1625-0031 Stat/Authority

Coast Guard, DHS

Pt. 111

also is to determine that the workmanship of all equipment and apparatus
and the installation is satisfactory.

111.05–19 Tank vessels; grounded distribution systems.

§ 110.30–5 Inspection for certification.
Electric installations and electric
equipment must be inspected at the inspection for certification and periodic
inspection to determine mechanical
and electrical condition and performance. Particular note must be made of
circuits added or modified after the
original issuance of the Certificate of
Inspection.

111.05–21 Ground detection.
111.05–23 Location of ground indicators.
111.05–25 Ungrounded systems.
111.05–27 Grounded neutral alternating current systems.
111.05–29 Dual voltage direct current systems.

[USCG 1999–4976, 65 FR 6504, Feb. 9, 2000]

§ 110.30–7 Repairs or alterations.
The Officer in Charge, Marine Inspection must be notified before—
(a) Alterations or modifications that
deviate from approved plans; or
(b) Repairs, alterations, or modifications that affect the safety of the vessel.
[CGD 94–108, 61 FR 28275, June 4, 1996]

GROUND DETECTION

GROUNDED CONDUCTORS
111.05–31 Grounding conductors for systems.
111.05–33 Equipment
safety
grounding
(bonding) conductors.
111.05–37 Overcurrent devices.

Subpart 111.10—Power Supply
111.10–1 Definitions.
111.10–3 Two generating sources.
111.10–4 Power requirements, generating
sources.
111.10–5 Multiple energy sources.
111.10–7 Dead ship.
111.10–9 Ship’s service supply transformers;
two required.

Subpart 111.12—Generator Construction
and Circuits

PART 111—ELECTRIC SYSTEMS—
GENERAL REQUIREMENTS

111.12–1 Prime movers.
111.12–3 Excitation.
111.12–5 Construction and testing of generators.
111.12–7 Voltage regulation and parallel operation.
111.12–9 Generator cables.
111.12–11 Generator protection.
111.12–13 Propulsion generator protection.

Subpart 111.01—General
Sec.
111.01–1
111.01–3
111.01–5
111.01–7
111.01–9
111.01–11
111.01–13
111.01–15
111.01–17
111.01–19

General.
Placement of equipment.
Protection from bilge water.
Accessibility and spacing.
Degrees of protection.
Corrosion-resistant parts.
Limitations on porcelain use.
Temperature ratings.
Voltage and frequency variations.
Inclination of the vessel.

Subpart 111.15—Storage Batteries and Battery Chargers: Contruction and Installation

Subpart 111.05—Equipment Ground,
Ground Detection, and Grounded Systems
111.05–1

Purpose.
EQUIPMENT GROUND

wreier-aviles on DSK3TPTVN1PROD with CFR

111.05–3 Design, construction, and installation; general.
111.05–7 Armored
and
metallic-sheathed
cable.
111.05–9 Masts.

111.15–1 General.
111.15–2 Battery construction.
111.15–3 Battery categories.
111.15–5 Battery installation.
111.15–10 Ventilation.
111.15–20 Conductors.
111.15–25 Overload and reverse current protection.
111.15–30 Battery chargers.

SYSTEM GROUNDING

Subpart 111.20—Transformer Construction,
Installation, and Protection

111.05–11 Hull return.
111.05–13 Grounding connection.
111.05–15 Neutral grounding.
111.05–17 Generation and distribution system grounding.

111.20–1 General requirements.
111.20–5 Temperature rise.
111.20–10 Autotransformers.
111.20–15 Protection of transformers against
overcurrent.

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Pt. 111

46 CFR Ch. I (10–1–11 Edition)
Subpart 111.25—Motors

Subpart 111.52—Calculation of ShortCircuit Currents

111.25–1 General requirements
111.25–5 Marking.
111.25–15 Duty cycle.

111.52–1
111.52–3
111.52–5

General.
Systems below 1500 kilowatts.
Systems 1500 kilowatts or above.

111.53–1

General.

Subpart 111.30—Switchboards
111.30–1 Location and installation.
111.30–3 Accessibility of switchboard components and connections.
111.30–4 Circuit breakers removable from
the front.
111.30–5 Construction.
111.30–11 Deck coverings.
111.30–15 Nameplates.
111.30–17 Protection of instrument circuits.
111.30–19 Buses and wiring.
111.30–24 Generation systems greater than
3000 kw.
111.30–25 Alternating-current ship’s service
switchboards.
111.30–27 Direct
current
ship’s
service
switchboards.
111.30–29 Emergency switchboards.

Subpart 111.53—Fuses

Subpart 111.54—Circuit Breakers
111.54–1
111.54–3

Subpart 111.55—Switches
111.55–1
111.55–3

111.59–1
111.59–3

General.
Nameplate data.
Installation.
Alarms and shutdowns.
Ventilation exhaust.
Propulsion systems.

Electrical propulsion installations.

Subpart 111.40—Panelboards
111.40–1 Panelboard standard.
111.40–5 Enclosure.
111.40–7 Location.
111.40–9 Locking device.
111.40–11 Numbered switching unit and panelboard directory.
111.40–13 Rating.
111.40–15 Overcurrent device.

Subpart 111.50—Overcurrent Protection

wreier-aviles on DSK3TPTVN1PROD with CFR

111.50–1 Protection of equipment.
111.50–2 Systems integration.
111.50–3 Protection of conductors.
111.50–5 Location of overcurrent protective
devices.
111.50–7 Enclosures.
111.50–9 Disconnecting and guarding.

Subpart 111.51—Coordination of
Overcurrent Protective Devices
111.51–1
111.51–3

General.
No mechanical cooling.

Subpart 111.60—Wiring Materials and
Methods

Subpart 111.35—Electric Propulsion
111.35–1

General.
Circuit connections.

Subpart 111.59—Busways

Subpart 111.33—Power Semiconductor
Rectifier Systems
111.33–1
111.33–3
111.33–5
111.33–7
111.33–9
111.33–11

Circuit breakers.
Remote control.

Purpose.
Protection of vital equipment.

111.60–1 Construction and testing of cable.
111.60–2 Specialty cable for communication
and RF applications.
111.60–3 Cable application.
111.60–4 Minimum cable conductor size.
111.60–5 Cable installation.
111.60–6 Fiber optic cable.
111.60–7 Demand loads.
111.60–9 Segregation of vital circuits.
111.60–11 Wire.
111.60–13 Flexible electric cord and cables.
111.60–17 Connections and terminations.
111.60–19 Cable splices.
111.60–21 Cable insulation tests.
111.60–23 Metal-clad (Type MC) cable.

Subpart 111.70—Motor Circuits, Controllers,
and Protection
111.70–1 General.
111.70–3 Motor controllers and motor-control centers.
111.70–5 Heater circuits.
111.70–7 Remote control, interlock, and indicator circuits.

Subpart 111.75—Lighting Circuits and
Protection
111.75–1 Lighting feeders.
111.75–5 Lighting branch circuits.
111.75–15 Lighting requirements.
111.75–16 Lighting of survival craft and rescue boats.
111.75–17 Navigation lights.
111.75–18 Signaling lights.
111.75–20 Lighting fixtures.

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Coast Guard, DHS

Pt. 111

Subpart 111.77—Appliances and
Appliance Circuits
111.77–1
111.77–3

Subpart 111.99—Fire Door Holding and
Release Systems
111.99–1
111.99–3
111.99–5

Overcurrent protection.
Appliances.

Applicability.
Definitions.
General.

Subpart 111.79—Receptacles
111.79–1 Receptacle outlets; general.
111.79–3 Grounding pole.
111.79–9 Transmitting power between receptacles.
111.79–11 Lifeboat receptacles.
111.79–13 Different voltages and power
types.
111.79–15 Receptacles for refrigerated containers.

Subpart 111.81—Outlet Boxes and Junction
Boxes
111.81–1 Outlet boxes and junction boxes;
general.
111.81–3 Cables entering boxes.

Subpart 111.83—Shore Connection Boxes
111.83–1 General.
111.83–5 Bottom entrance and protected enclosures.

Subpart 111.85—Electric Oil Immersion
Heaters
111.85–1

Electric oil immersion heaters.

Subpart 111.87—Electric Air Heating
Equipment
111.87–1
111.87–3

Applicability.
General requirements.

Subpart 111.91—Elevators and
Dumbwaiters
111.91–1 Power, control, and interlock circuits.

Subpart 111.95—Electric Power-Operated
Boat Winches
111.95–1
111.95–3
111.95–7

Applicability.
General requirements.
Wiring of boat winch components.

Subpart 111.101—Submersible MotorDriven Bilge Pumps
111.101–1
111.101–3

Subpart 111.103—Remote Stopping
Systems
111.103–1 Power ventilation systems except
machinery space ventilation systems.
111.103–3 Machinery space ventilation.
111.103–7 Ventilation stop stations.
111.103–9 Machinery stop stations.

Subpart 111.105—Hazardous Locations
111.105–1 Applicability; definition.
111.105–3 General requirements.
111.105–5 System integrity.
111.105–7 Approved equipment.
111.105–9 Explosion-proof and flameproof
equipment.
111.105–11 Intrinsically safe systems.
111.105–15 Additional methods of protection.
111.105–17 Wiring methods for hazardous locations.
111.105–19 Switches.
111.105–21 Ventilation.
111.105–27 Belt drives.
111.105–29 Combustible liquid cargo carriers.
111.105–31 Flammable or combustible cargo
with a flashpoint below 60 °C (140 °F), carriers of liquid-sulphur or inorganic acid.
111.105–32 Bulk liquefied flammable gas and
ammonia carriers.
111.105–33 Mobile offshore drilling units.
111.105–35 Vessels carrying coal.
111.105–37 Flammable anesthetics.
111.105–39 Additional requirements for vessels carrying vehicles with fuel in their
tanks.
111.105–40 Additional requirements for RO/
RO vessels.
111.105–41 Battery rooms.
111.105–43 Paint stowage or mixing spaces.
111.105–45 Vessels
carrying
agricultural
products.

wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 111.97—Electric Power-Operated
Watertight Door Systems
111.97–1
111.97–3
111.97–5
ply.
111.97–7
111.97–9

Applicability.
General requirements.

Subpart 111.107—Industrial Systems

Applicability.
General requirements.
Electric and hydraulic power supDistribution.
Overcurrent protection.

111.107–1

Industrial systems.

AUTHORITY: 46 U.S.C. 3306, 3703; Department of Homeland Security Delegation No.
0170.1.
SOURCE: CGD 74–125A, 47 FR 15236, Apr. 8,
1982, unless otherwise noted.

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§ 111.01–1

46 CFR Ch. I (10–1–11 Edition)

Subpart 111.01—General
§ 111.01–1 General.
(a) Electric installations on vessels
must ensure:
(1) Maintenance of services necessary
for safety under normal and emergency
conditions.
(2) Protection of passengers, crew,
other persons, and the vessel from electrical hazards.
(3) Maintenance of system integrity
through compliance with the applicable system requirements (IEEE, NEC,
IEC, etc.) to which plan review has
been approved.
(b) Combustible material should be
avoided in the construction of electrical equipment.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28275, June 4,
1996; 62 FR 23907, May 1, 1997]

§ 111.01–3 Placement of equipment.
(a) Electric equipment must be arranged, as far as practicable, to prevent mechanical damage to the equipment from the accumulation of dust,
oil vapors, steam, or dripping liquids.
(b) Apparatus that may arc must be
ventilated or be in ventilated compartments in which flammable gases, acid
fumes, and oil vapors cannot accumulate. Skylights and ventilators must be
arranged to prevent flooding of the apparatus.
§ 111.01–5 Protection from bilge water.
Each of the following in or around
the bilge area must be arranged or constructed so that it cannot be damaged
by bilge water:
(a) Generators.
(b) Motors.
(c) Electric coupling.
(d) Electric cable.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 61 FR 28275, June 4, 1996]

§ 111.01–7 Accessibility and spacing.
(a) The design and arrangement of
electric apparatus must afford accessibility to each part as needed to facilitate proper inspection, adjustment,
maintenance, or replacement.
(b) Within an enclosure, the spacing
between energized components (or between an energized component and
ground) must be to the appropriate in-

dustry standard for the voltage and
current utilized in the circuit. Additionally, spacing within any enclosure
must be sufficient to facilitate servicing.
[CGD 94–108, 61 FR 28275, June 4, 1996]

§ 111.01–9

Degrees of protection.

(a) Interior electrical equipment exposed to dripping liquids or falling
solid particles must be manufactured
to at least NEMA 250 or IEC 60529 (both
incorporated by reference; see 46 CFR
110.10–1) IP 22 degree of protection as
appropriate for the service intended.
(b) Electrical equipment in locations
requiring exceptional degrees of protection as defined in 46 CFR 110.15–1
must be enclosed to meet at least the
minimum degrees of protection in ABS
Steel Vessel Rules (incorporated by
reference; see 46 CFR 110.10–1), section
4–8–3, Table 2, or appropriate NEMA 250
type for the service intended. Each enclosure must be designed so that the
total rated temperature of the equipment inside the enclosure is not exceeded.
(c) Central control consoles and similar control enclosures must be manufactured to at least NEMA 250 Type 2
or IEC 60529 IP 22 degree of protection
regardless of location.
(d) Equipment for interior locations
not requiring exceptional degrees of
protection must be manufactured to at
least NEMA 250 Type 1 with dripshield
or IEC 60529 IP 11 as specified in IEC
60529.
[USCG–2003–16630, 73 FR 65195, Oct. 31, 2008]

§ 111.01–11

Corrosion-resistant parts.

Each enclosure and part of electric
equipment that can be damaged by corrosion must be made of corrosion-resistant materials or of materials having a corrosion resistant finish.
§ 111.01–13
use.

Limitations

on

porcelain

Porcelain must not be used for lamp
sockets, switches, receptacles, fuse
blocks, or other electric equipment
where the item is solidly mounted by
machine screws or their equivalent, unless the porcelain piece is resiliently
mounted.

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Coast Guard, DHS
§ 111.01–15

§ 111.05–3

Temperature ratings.

(a) In this subchapter, an ambient
temperature of 40°C (104°F) is assumed
except as otherwise stated.
(b) A 50°C (122°F) ambient temperature is assumed for all rotating electrical machinery in boiler rooms, engine
rooms,
auxiliary
machinery
rooms, and weather decks, unless it
can be shown that a 45°C (113°F) ambient temperature will not be exceeded
in these spaces.
(c) A 45 °C (113 °F) ambient temperature is assumed for cable and all other
non-rotating electrical equipment in
boiler rooms, in engine rooms, in auxiliary machinery rooms, and on weather
decks. For installations using UL 489
(incorporated by reference; see 46 CFR
110.10–1) SA marine type circuit breakers, the ambient temperature for that
component is assumed to be 40 °C
(104 °F). For installations using Navy
type circuit breakers, the ambient
temperature for that component is assumed to be 50 °C (122 °F).
(d) Unless otherwise indicated in this
subchapter, a 55°C (131°F) ambient temperature is assumed for all control and
instrumentation equipment.
(e) If electrical equipment is utilized
in a space in which the equipment’s
rated ambient temperature is below
the assumed ambient temperature of
the space, its load must be derated.
The assumed ambient temperature of
the space plus the equipment’s actual
temperature rise at its derated load
must not exceed the equipment’s total
rated temperature (equipment’s rated
ambient temperature plus its rated
temperature rise).
[CGD 94–108, 61 FR 28276, June 4, 1996, as
amended at 62 FR 23907, May 1, 1997; USCG–
2004–18884, 69 FR 58348, Sept. 30, 2004; USCG–
2003–16630, 73 FR 65196, Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.01–17 Voltage
variations.

and

frequency

Unless otherwise stated, electrical
equipment must function at variations
of at least ±5 percent of rated frequency and +6 percent to ¥10 percent
of rated voltage. This limitation does
not address transient conditions.
[CGD 94–108, 61 FR 28276, June 4, 1996]

§ 111.01–19 Inclination of the vessel.
(a) All electrical equipment must be
designed and installed to operate for
the particular location and environment in which it is to be used. Additionally, electrical equipment necessary for the maneuvering, navigation, and safety of the vessel or its personnel must be designed and installed
to operate under any combination of
the following conditions:
(1) 15 degrees static list, 22.5 degrees
dynamic roll; and
(2) 7.5 degrees static trim.
(b) All emergency installations must
be designed and installed to operate
when the vessel is at 22.5 degrees list
and 10 degrees trim.
[CGD 94–108, 61 FR 28276, June 4, 1996, as
amended at 62 FR 23907, May 1, 1997]

Subpart
111.05—Equipment
Ground, Ground Detection,
and Grounded Systems
§ 111.05–1 Purpose.
This subpart contains requirements
for the grounding of electric systems,
circuits, and equipment.
NOTE: Circuits are grounded to limit excessive voltage from lightning, transient surges,
and unintentional contact with higher voltage lines, and to limit the voltage to ground
during normal operation. Conductive materials enclosing electric conductors and
equipment, or forming part of that equipment, are grounded to prevent a voltage
above ground on the enclosure materials.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28276, June 4,
1996]

EQUIPMENT GROUND
§ 111.05–3 Design, construction, and installation; general.
(a) An electric apparatus must be designed, constructed, and installed to
prevent any person from accidentally
contacting energized parts.
(b)
Exposed,
noncurrent-carrying
metal parts of fixed equipment that
may become energized because of any
condition must be grounded.
(c)
Exposed,
noncurrent-carrying
metal parts of portable equipment
must be grounded through a conductor
in the supply cable to the grounding
pole in the receptacle.

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§ 111.05–7

46 CFR Ch. I (10–1–11 Edition)

(d) If the installation of the electrical equipment does not ensure a
positive ground to the metal hull or
equivalent conducting body, the apparatus must be grounded to the hull
with a grounding conductor.
§ 111.05–7 Armored
sheathed cable.

and

metallic

When installed, the metallic armor
or sheath must meet the installation
requirements of Section 25 of IEEE 45–
2002 (incorporated by reference; see 46
CFR 110.10–1).
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

§ 111.05–9

Masts.

Each nonmetallic mast and topmast
must have a lightning-ground conductor in accordance with section 10 of
IEC 92–401 (incorporated by reference;
see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

SYSTEM GROUNDING
§ 111.05–11

Hull return.

(a) A vessel’s hull must not carry
current as a conductor except for the
following systems:
(1) Impressed current cathodic protection systems.
(2) Limited and locally grounded systems, such as a battery system for engine starting that has a one-wire system and the ground lead connected to
the engine.
(3) Insulation level monitoring devices if the circulation current does
not exceed 30 milliamperes under the
most unfavorable conditions.
(4) Welding systems with hull return
except vessels subject to 46 CFR Subchapter D.
§ 111.05–13

Grounding connection.

Each grounded system must have
only one point of connection to ground
regardless of the number of power
sources operating in parallel in the system.
wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.05–15

Neutral grounding.

(a) Each propulsion, power, lighting,
or distribution system having a neutral
bus or conductor must have the neutral
grounded.

(b) The neutral of a dual-voltage system must be solidly grounded at the
generator switchboard.
§ 111.05–17 Generation and
tion system grounding.

The neutral of each grounded generation and distribution system must:
(a) Be grounded at the generator
switchboard, except the neutral of an
emergency power generation system
must be grounded with:
(1) No direct ground connection at
the emergency switchboard;
(2) The neutral bus permanently connected to the neutral bus on the main
switchboard; and
(3) No switch, circuit breaker, or fuse
in the neutral conductor of the bus-tie
feeder
connecting
the
emergency
switchboard to the main switchboard;
and
(b) Have the ground connection accessible for checking the insulation resistance of the generator to ground before the generator is connected to the
bus.
§ 111.05–19 Tank vessels; grounded distribution systems.
(a) If the voltage of a distribution
system is less than 1,000 volts, line to
line, a tank vessel must not have a
grounded distribution system.
(b) If the voltage of a distribution
system on a tank vessel is 1,000 volts or
greater, line to line, and the distribution system is grounded (including
high-impedance grounding), any resulting current must not flow through a
hazardous (classified) location.
[CGD 94–108, 61 FR 28276, June 4, 1996, as
amended at 62 FR 23907, May 1, 1997]

GROUND DETECTION
§ 111.05–21

Ground detection.

There must be ground detection for
each:
(a) Electric propulsion system;
(b) Ship’s service power system;
(c) Lighting system; and
(d) Power or lighting distribution
system that is isolated from the ship’s
service power and lighting system by
transformers, motor generator sets, or
other devices.

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Coast Guard, DHS

§ 111.05–37

§ 111.05–23 Location of ground indicators.
Ground indicators must:
(a) Be at the vessel’s ship’s service
generator distribution switchboard for
the normal power, normal lighting, and
emergency lighting systems;
(b) Be at the propulsion switchboard
for propulsion systems; and
(c) Be readily accessible.
(d) Be provided (at the distribution
switchboard or at another location,
such as a centralized monitoring position for the circuit affected) for each
feeder circuit that is isolated from the
main source by a transformer or other
device.
NOTE TO PARAGRAPH (d): An alarm contact
or indicating device returned to the main
switchboard via a control cable, that allows
the detecting equipment to remain near the
transformer or other isolating device for
local troubleshooting, is allowed.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28276, June 4,
1996; 62 FR 23907, May 1, 1997]

§ 111.05–25 Ungrounded systems.
Each ungrounded system must be
provided with a suitably sensitive
ground detection system located at the
respective switchboard which provides
continuous indication of circuit status
to ground with a provision to momentarily remove the indicating device
from the reference ground.

[CGD 94–108, 61 FR 28276, June 4, 1996]

GROUNDED CONDUCTORS
§ 111.05–31 Grounding conductors for
systems.
(a) A conductor for grounding a direct-current system must be the larger
of:
(1) The largest conductor supplying
the system; or
(2) No. 8 AWG (8.4mm2).
(b) A conductor for grounding the
neutral of an alternating-current system must meet Table 111.05–31(b).
TABLE 111.05–31(b)—NEUTRAL GROUNDING
CONDUCTOR FOR ALTERNATING-CURRENT
SYSTEM
Size of the largest generator cable or equivalent for parallel generators—AWG-MCM (mm2)
Greater than

Less than or equal to

Size of the
system
grounding
conductor—
AWG(mm2)

....................................
2 (33.6) ......................
0 (53.5) ......................
3/0 (85.0) ...................
350 MCM (177) .........
600 MCM (304) .........
1100 MCM (557) .......

2 (33.6) ......................
0 (53.5) ......................
3/0 (85.0) ...................
350 MCM (177) .........
600 MCM (304) .........
1100 MCM (557) .......
...................................

8 (8.4)
6 (13.3)
4 (21.2)
2 (33.6)
0 (53.5)
2/0 (67.5)
3/0 (85.0)

§ 111.05–33 Equipment safety grounding (bonding) conductors.

[CGD 94–108, 61 FR 28276, June 4, 1996]

§ 111.05–27 Grounded neutral alternating current systems.
Grounded neutral and high-impedance grounded neutral alternating current systems must have a suitably sensitive ground detection system which
indicates current in the ground connection, is able to withstand the maximum available fault current without
damage, and provides continuous indication of circuit status to ground. A
provision must be included to compare
indications under fault conditions with
those under normal conditions.
wreier-aviles on DSK3TPTVN1PROD with CFR

ground detection system which indicates current in the ground connection,
has a range of at least 150 percent of
neutral current rating and indicates
the polarity of the fault.

(a) Each equipment-grounding conductor must be sized in accordance
with Section 250.122 of NFPA NEC 2002
(incorporated by reference; see 46 CFR
110.10–1).
(b) Each equipment-grounding conductor (other than a system-grounding
conductor) of a cable must be permanently identified as a grounding conductor in accordance with the requirements of Section 250.119 of NFPA NEC
2002.
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

[CGD 94–108, 62 FR 23907, May 1, 1997]

§ 111.05–37

§ 111.05–29 Dual voltage direct current
systems.
Each dual voltage direct current system must have a suitably sensitive

(a) A permanently grounded conductor must not have an overcurrent
device unless the overcurrent device simultaneously opens each ungrounded
conductor of the circuit.

Overcurrent devices.

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§ 111.10–1

46 CFR Ch. I (10–1–11 Edition)

(b) The neutral conductor of the
emergency-main switchboard bus-tie
must not have a switch or circuit
breaker.
[CGD 94–108, 61 FR 28276, June 4, 1996]

Subpart 111.10—Power Supply
§ 111.10–1 Definitions.
As used in this Subpart:
(a) Ships’s service loads mean electrical equipment for all auxiliary services necessary for maintaining the vessel in a normal, operational and habitable condition. Ship’s service loads include, but are not limited to, all safety,
lighting,
ventilation,
navigational,
communications, habitability, and propulsion auxiliary loads. Electrical propulsion motor, bow thruster motor,
cargo transfer, drilling, cargo refrigeration for other than Class 5.2 organic
peroxides and Class 4.1 self-reactive
substances, and other industrial type
loads are not included.
(b) Drilling loads means all loads associated exclusively with the drilling operation including power to the drill
table, mud system, and positioning
equipment.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28276, June 4,
1996; 62 FR 23907, May 1, 1997]

§ 111.10–3 Two generating sources.
In addition to the emergency power
sources required under part 112 of this
chapter, each self-propelled vessel and
each mobile offshore drilling unit must
have at least two electric generating
sources.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 61 FR 28276, June 4, 1996]

§ 111.10–4 Power requirements, generating sources.
(a) The aggregate capacity of the
electric
ship’s
service
generating
sources required in § 111.10–3 must be
sufficient for the ship’s service loads.
(b) With the ship’s service generating
source of the largest capacity stopped,
the combined capacity of the remaining electric ship’s service generating
source or sources must be sufficient to
supply those services necessary to provide normal operational conditions of
propulsion and safety, and minimum
comfortable conditions of habitability.

Habitability services include cooking,
heating, air conditioning (where installed), domestic refrigeration, mechanical ventilation, sanitation, and
fresh water.
(c) The capacity of the ship’s service
generating sources must be sufficient
for supplying the ship’s service loads
without the use of a generating source
which is dependent upon the speed or
direction of the main propelling engines or shafting.
(d) Operating generators must provide a continuous and uninterrupted
source of power for the ship’s service
load under normal operational conditions. Any vessel speed change or
throttle movement must not cause a
ship’s service load power interruption.
(e) Vessels with electric propulsion
that have two or more constant-voltage generators which supply both
ship’s service and propulsion power do
not need additional ship’s service generators provided that with any one propulsion/ship’s service generator out of
service the capacity of the remaining
generator(s) is sufficient for the electrical loads necessary to provide normal operational conditions of propulsion and safety, and minimum comfortable conditions of habitability.
(f) A generator driven by a main propulsion unit (such as a shaft generator)
which is capable of providing electrical
power continuously, regardless of the
speed and direction of the propulsion
shaft, may be considered one of the
ship’s service generating sets required
by § 111.10–3. A main-engine-dependent
generator which is not capable of providing continuous electrical power may
be utilized as a supplemental generator
provided that a required ship’s service
generator or generators having sufficient capacity to supply the ship’s
service loads can be automatically
brought on line prior to the main-engine-dependent generator tripping offline due to a change in the speed or direction of the main propulsion unit.
[CGD 94–108, 61 FR 28277, June 4, 1996; 61 FR
36787, July 12, 1996]

§ 111.10–5

Multiple energy sources.

Failure of any single generating set
energy source such as a boiler, diesel,
gas turbine, or steam turbine must not

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Coast Guard, DHS

§ 111.12–5

cause all generating sets required in
§ 111.10–3 to be inoperable.
§ 111.10–7

Dead ship.

(a) The generating plant of each selfpropelled vessel must provide the electrical services necessary to start the
main propulsion plant from a dead ship
condition.
(b) If the emergency generator is
used for part or all of the electric
power necessary to start the main propulsion plant from a dead ship condition, the emergency generator must be
capable of providing power to all emergency lighting, emergency internal
communications systems, and fire detection and alarm systems in addition
to the power utilized for starting the
main propulsion plant. Additional requirements are in § 112.05–3(c) of this
chapter.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28277, June 4,
1996]

§ 111.10–9 Ship’s service supply transformers; two required.
If transformers are used to supply
the ship’s service distribution system
required by this subpart for ships and
mobile offshore drilling units, there
must be at least two installed, independent power transformers. With the
largest transformer out of service, the
capacity of the remaining units must
be sufficient to supply the ship service
loads.
NOTE TO § 111.10–9: A ship’s service supply
system would consist of transformers, overcurrent protection devices, and cables, and
would normally be located in the system between a medium voltage bus and a low voltage ship’s service switchboard.
[CGD 94–108, 61 FR 28277, June 4, 1996; 61 FR
33045, June 26, 1996]

wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 111.12—Generator
Construction and Circuits
§ 111.12–1 Prime movers.
(a) Prime movers must meet section
58.01–5 and 46 CFR subpart 58.10 except
that those for mobile offshore drilling
units must meet Part 4, Chapter 3, sections 4/3.17 and 4/3.19 of the ABS MODU
Rules (incorporated by reference; see 46
CFR 110.10–1). Further requirements for

emergency generator prime movers are
in 46 CFR subpart 112.50.
(b) Each generator prime mover must
have an overspeed device that is independent of the normal operating governor and adjusted so that the speed
cannot exceed the maximum rated
speed by more than 15 percent.
(c) Each prime mover must shut
down automatically upon loss of lubricating pressure to the generator bearings if the generator is directly coupled
to the engine. If the generator is operating from a power take-off, such as a
shaft driven generator on a main propulsion engine, the generator must
automatically declutch (disconnect)
from the prime mover upon loss of lubricating pressure to generator bearings.
[CGD
33045,
23907,
65196,

94–108, 61 FR 28277, June 4, 1996; 61 FR
June 26, 1996, as amended at 62 FR
May 1, 1997; USCG–2003–16630, 73 FR
Oct 31, 2008]

§ 111.12–3

Excitation.

In general, excitation must meet sections 4–8–3/13.2(a), 4–8–5/5.5.1, 4–8–5/5.5.2,
and 4–8–5/5.17.6 of the ABS Steel Vessel
Rules (incorporated by reference; see 46
CFR 110.10–1), except that those for mobile offshore drilling units must meet
Part 4, Chapter 3, sections 4/3.21.1 and 4/
3.23.1 of the ABS MODU Rules (incorporated by reference; see 46 CFR 110.10–
1). In particular, no static exciter may
be used for excitation of an emergency
generator unless it is provided with a
permanent magnet or a residual-magnetism-type exciter that has the capability of voltage build-up after two
months of no operation.
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

§ 111.12–5 Construction and testing of
generators.
Each generator must meet the applicable requirements for construction
and testing in section 4–8–3 of the ABS
Steel Vessel Rules (incorporated by
reference; see 46 CFR 110.10–1) except
that each one for a mobile offshore
drilling unit must meet the requirements in part 4, chapter 3, section 4 of
the ABS MODU Rules (incorporated by
reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

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§ 111.12–7

46 CFR Ch. I (10–1–11 Edition)

§ 111.12–7 Voltage regulation and parallel operation.
Voltage regulation and parallel operation must meet:
(a) For AC systems: sections 4–2–3/
7.5.2, 4–2–4/7.5.2, 4–8–3/3.13.2, and 4–8–3/
3.13.3 of the ABS Steel Vessel Rules (incorporated by reference; see 46 CFR
110.10–1);
(b) For DC systems: section 4–8–3/
3.13.3(c) of the ABS Steel Vessel Rules,
and IEC 92–202 and IEC 92–301 (both incorporated by reference; see 46 CFR
110.10–1); and
(c) For mobile offshore drilling units:
Part 4, Chapter 3, section 4/3.21.2, 4/
3.21.3, 4/3.23.2, and 4/3.23.3 of the ABS
MODU Rules (incorporated by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

§ 111.12–9

Generator cables.

(a) The current-carrying capacity of
generator cables must not be:
(1) Less than 115 percent of the continuous generator rating; or
(2) Less than 115 percent of the overload for a machine with a 2 hour or
greater overload rating.
(b) Generator cables must not be in
the bilges.

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.12–11

Generator protection.

(a) Applicability. This section applies
to each generator except a propulsion
generator.
(b) General. Each ship’s service generator and emergency generator must be
protected by an individual, tripfree, air
circuit breaker whose tripping characteristics can be set or adjusted to
closely match the generator capabilities and meet the coordination requirements of Subpart 111.51. Each circuit
breaker must contain the trips required by this section.
(c) Type of trips. A circuit breaker for
a generator must:
(1) Open upon the shutting down of
the prime mover;
(2) Have longtime overcurrent trips
or relays set as necessary to coordinate
with the trip settings of the feeder circuit breakers; and
(3) Not have an instantaneous trip
with the exception that an instantaneous trip is required if:

(i) Three or more alternating-current
generators can be paralleled; or
(ii) The circuit breaker is for a direct
current generator.
(d) Setting of longtime overcurrent trips.
The pickup setting of the longtime
overcurrent trip of a generator circuit
breaker must not be larger than:
(1) 115 percent of the generator rating
for a continuous rated machine; or
(2) 115 percent of the overload rating
for a machine with a 2-hour or greater
overload rating.
(e) Setting of instantaneous trips. The
instantaneous trip of a generator circuit breaker must be set above, but as
close as practicable to, the maximum
asymmetrical short circuit available
from any one of the generators that
can be paralleled.
(f) Reverse-power and reverse-current
trips. Each generator arranged for parallel operation must have reversepower or reverse-current trips.
(g) Location. A ship’s service generator overcurrent protective device
must be on the ship’s service generator
switchboard. The generator and its
switchboard must be in the same space.
(For the purposes of this section, the
following are not considered separate
from the machinery space: (1) A control room that is inside of the machinery casing and (2) a dedicated switchgear and semiconductor rectifier (SCR)
compartment on a mobile offshore
drilling unit that is separate from but
directly adjacent to and on the same
level as the generator room).
(h) Three-wire, single-phase and fourwire, three-phase generators. There must
be circuit breaker poles for each generator lead, except in the neutral lead.
(i) Three-wire, direct-current generators. Each three-wire, direct current
generator must meet the following requirements:
(1) Circuit breaker poles. There must
be separate circuit breaker poles for
the positive and negative leads, and,
unless the main poles provide protection, for each equalizer lead. If there
are equalizer poles for a three-wire
generator, each overload trip must be
of the ‘‘Algebraic’’ type. If there is a
neutral pole in the generator circuit
breaker, there must not be an overload
trip element for the neutral pole. In

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Coast Guard, DHS

§ 111.15–5

this case, there must be a neutral overcurrent relay and alarm system that is
set to function at a current value not
more than the neutral rating.
(2) Equalizer buses. For each threewire generator, the circuit breaker
must protect against a short circuit on
the equalizer bus.
(j) Circuit breaker reclosing. Generator
circuit breakers must not automatically close after tripping.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 81–030, 53 FR 17847, May 18,
1988; CGD 94–108, 61 FR 28277, June 4, 1996; 62
FR 23908, May 1, 1997]

§ 111.12–13 Propulsion generator protection.
For
general
requirements,
§ 111.35–1 of this chapter.

see

Subpart 111.15—Storage Batteries
and Battery Chargers: Construction and Installation
§ 111.15–1

General.

Each battery must meet the requirements of this subpart.
[CGD 94–108, 61 FR 28277, June 4, 1996]

§ 111.15–2

Battery construction.

(a) A battery cell, when inclined at 40
degrees from the vertical, must not
spill electrolyte.
(b) Each fully charged lead-acid battery must have a specific gravity that
meets section 22 of IEEE 45–2002 (incorporated by reference; see 46 CFR 110.10–
1).
(c) Batteries must not evolve hydrogen at a rate exceeding that of a similar size lead-acid battery under similar
charging condition.
(d) Batteries must be constructed to
take into account the environmental
conditions of a marine installation, including temperature, vibration, and
shock.
[CGD 94–108, 61 FR 28277, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65196,
Oct. 31, 2008]
wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.15–3

Battery categories.

(a) A battery installation is classified
as one of three types, based upon power
output of the battery charger, as follows:

(1) Large. A large battery installation
is one connected to a battery charger
that has an output of more than 2 kw
computed from the highest possible
charging current and the rated voltage
of the battery installation.
(2) Moderate. A moderate battery installation is one connected to a battery
charger that has an output of between
0.2 kw and 2 kw computed from the
highest possible charging current and
the rated voltage of the battery installation.
(3) Small. A small battery installation
is one connected to a battery charger
that has an output of less than 0.2 kw
computed from the highest possible
charging current and the rated voltage
of the battery installation.
(b) Batteries that generate less hydrogen under normal charging and discharging conditions than an equivalent
category of lead-acid batteries (e.g.,
sealed batteries) may have their battery category reduced to an equivalent
category of lead-acid batteries.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28278, June 4,
1996]

§ 111.15–5 Battery installation.
(a) Large batteries. Each large battery
installation must be in a room that is
only for batteries or a box on deck. Installed electrical equipment must meet
the hazardous location requirements in
subpart 111.105 of this part.
(b) Moderate batteries. Each moderate
battery installation must be in a battery room, in a box on deck, or in a box
or locker in another space such as an
engineroom, storeroom, or similar
space, except if a moderate battery installation is in a ventilated compartment such as the engineroom and is
protected from falling objects, a box or
locker is not required. A moderate battery installation must not be in a
sleeping space. An engine cranking battery for one or more engines must be as
close as possible to the engine or engines.
(c) Small batteries. Small size battery
installations must not be located in
poorly-ventilated spaces, such as closets, or in living spaces, such as staterooms.
(d) Battery trays. Each battery tray
must be chocked with wood strips or

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§ 111.15–10

46 CFR Ch. I (10–1–11 Edition)

their equivalent to prevent movement,
and each tray must have non-absorbent
insulating supports on the bottom and
similar spacer blocks at the sides, or
equivalent provisions for air circulation space all around each tray. Each
battery tray must provide adequate accessibility for installation, maintenance, and removal of the batteries.
(e) Nameplates. Each battery must be
provided with the name of its manufacturer, model number, type designation,
either the cold cranking amp rating or
the amp-hour rating at a specific discharge and, for a lead-acid battery, the
fully charged specific gravity value.
This information must be permanently
fixed to the battery.
(f) Lining in battery rooms and lockers.
(1) Each battery room and locker must
have a watertight lining that is—
(i) On each shelf to a height of at
least 76 mm (3 inches); or
(ii) On the deck to a height of at
least 152 mm (6 inches).
(2) For lead-acid batteries, the lining
must be 1.6 mm (1⁄16 inch) thick lead or
other material that is corrosion-resistant to the electrolyte of the battery.
(3) For alkaline batteries, the lining
must be 0.8 mm (1⁄32 inch) thick steel or
other material that is corrosion-resistant to the electrolyte of the battery.
(g) Lining of battery boxes. Each battery box must have a watertight lining
to a height of at least 76 mm (3 inches)
that meets paragraphs (f)(2) and (f)(3)
of this section.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28278, June 4,
1996; 61 FR 36787, July 12, 1996; 62 FR 23908,
May 1, 1997]

§ 111.15–10 Ventilation.
(a) General. Each room, locker, and
box for storage batteries must be arranged or ventilated to prevent accumulation of flammable gas.
(b) Power ventilation. If power ventilation is required, the following must be
met:
(1) The power ventilation system
must be separate from ventilation systems for other spaces.
(2) Electric motors must be outside
the duct and compartment and:
(i) Have an explosion-proof motor for
a Class I, Division 1, Group B location;
or

(ii) Be at least 10 ft. (3 m) from the
exhaust end of the duct.
(3) Each blower must have a nonsparking fan.
(4) The power ventilation system
must be interlocked with the battery
charger so that the battery cannot be
charged without ventilation.
(c) Large battery installations. Each
battery room for large battery installations must have a power exhaust ventilation system and have openings for
intake air near the floor that allow the
passage of the quantity of air that
must be expelled. The quantity of the
air expelled must be at least:
q=3.89(i)(n).
where: q=quantity of expelled air in cubic
feet per hour.
i=Maximum charging current during gas formation, or one-fourth of the maximum obtainable charging current of the charging
facility, whichever is greater.
n=Number of cells.

(d) Moderate and small battery installations. Each battery room or battery
locker for moderate or small battery
installations must have louvers near
the bottom of the room or locker for
air, and must be ventilated by:
(1) Ventilation that meets paragraph
(c) of this section;
(2) An exhaust duct:
(i) That ends in a mechanically ventilated space or in the weather;
(ii) That extends from the top of the
room or locker to at least 3 ft. (1 m)
above the top of the room or locker;
(iii) That is at an angle of 45 degrees
or less from the vertical; and
(iv) That has no appliances, such as
flame arresters, that impede free passage of air or gas mixtures; or
(3) A duct from the top of the room
or locker to an exhaust ventilation
duct.
(e) Deck boxes. Except for a deck box
for a small battery installation, each
deck box must have a duct from the
top of the box to at least 4 ft. (1.2 m)
above the box ending in a gooseneck or
mushroom head that prevents entrance
of water. Holes for air must be on at
least two parallel sides of each box.
(f) Weathertight. Each deck box must
be weathertight.
(g) Boxes for small battery installations.
Each box for a small battery installation must have openings near the top

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Coast Guard, DHS

§ 111.25–1

to allow escape of gas. If the installation is in a non-environmentally-controlled location, the installation must
prevent the ingress of water.

Subpart 111.20—Transformer Construction, Installation, and Protection

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28278, June 4,
1996]

§ 111.20–1

§ 111.15–20

Conductors.

(a) Each conductor penetration to a
battery room must be made watertight.
(b) The termination of each cable
must be sealed to prevent the entrance
of electrolyte by spray or creepage.
(c) Each connecting cable must have
sufficient capacity to carry the maximum charging current or maximum
discharge current, whichever is greater, while maintaining the proper voltage at the load end.
[CGD 94–108, 61 FR 28278, June 4, 1996, as
amended at 62 FR 23908, May 1, 1997]

§ 111.15–25 Overload and reverse current protection.
(a) An overload protective device
must be in each battery conductor, except conductors of engine cranking
batteries and batteries with a nominal
potential of 6 volts or less. For large
storage battery installations, the overcurrent protective devices must be
next to, but outside of, the battery
room.
(b) Except when a rectifier is used,
the charging equipment for all batteries with a nominal voltage more
than 20 percent of line voltage must
protect automatically against reversal
of current.

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.15–30

Battery chargers.

Each battery charger enclosure must
meet § 111.01–9. Additionally, each
charger must be suitable for the size
and type of battery installation that it
serves. Chargers incorporating grounded autotransformers must not be used.
Except for rectifiers, chargers with a
voltage exceeding 20 percent of the line
voltage must be provided with automatic protection against reversal of
current.
[CGD 94–108, 61 FR 28278, June 4, 1996; 61 FR
36787, July 12, 1996]

General requirements.

Each transformer winding must be
resistant to moisture, sea atmosphere,
and oil vapor, unless special precautions are taken, such as enclosing
the winding in an enclosure with a high
degree of ingress protection.
[CGD 94–108, 61 FR 28278, June 4, 1996]

§ 111.20–5

Temperature rise.

(a) The temperature rise, based on an
ambient temperature of 40 degrees C,
must not exceed the following:
(1) For Class A insulation, 55 degrees
C.
(2) For Class B insulation, 80 degrees
C.
(3) For Class F insulation, 115 degrees
C.
(4) For Class H insulation, 150 degrees
C.
(b) If the ambient temperature is
higher than 40 degrees C, the transformer must be derated so that the
total temperature stated in this section is not exceeded. The temperature
must be taken by the resistance method.
§ 111.20–10

Autotransformers.

An autotransformer must not supply
feeders or branch circuits.
§ 111.20–15 Protection of transformers
against overcurrent.
Each transformer must have protection against overcurrent that meets
Article 450 of NFPA NEC 2002 or IEC
92–303 (both incorporated by reference;
see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

Subpart 111.25—Motors
§ 111.25–1

General requirements.

The requirements for generators contained in § 111.12–5 apply to motors.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 62 FR 23908, May 1,
1997]

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§ 111.25–5
§ 111.25–5

46 CFR Ch. I (10–1–11 Edition)
Marking.

(a) Each motor must have a marking
or nameplate that meets either Section
430.7 of NFPA NEC 2002 or clause 16 of
IEC 92–301 (both incorporated by reference; see 46 CFR 110.10–1).
(b) The marking or nameplate for
each motor that is in a corrosive location must be corrosion-resistant.

§ 111.30–4 Circuit breakers removable
from the front.

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28278, June 4,
1996; USCG–2003–16630, 73 FR 65196, Oct. 31,
2008]

Circuit breakers, when installed on
generator or distribution switchboards,
must be mounted or arranged in such a
manner that the circuit breaker may
be removed from the front without unbolting bus or cable connections or deenergizing the supply, unless the
switchboard is divided into sections,
such that each section is capable of
providing power to maintain the vessel
in a navigable condition, and meets
§ 111.30–24 (a) and (b).

§ 111.25–15

[CGD 94–108, 61 FR 28278, June 4, 1996]

Duty cycle.

Each motor must be rated for continuous duty, except a motor for an application listed in Table 111.25–15 or a
similar duty must meet the minimum
short-time rating stated in the table.
TABLE 111.25–15
Application of motor
Deck winch and direct acting
capstan.
Deck winch with hydraulic
transmission.
Direct acting windlass ............
Windlass with hydraulic transmission.
Steering gear, direct acting ...
Steering gear, indirect drive ..

Watertight door operators ......
Boat winches .........................

Minimum short-time rating of
motor, in hours
Half.
Continuous at no load followed by 1⁄2 hr. at full load.
One fourth.
Half hour idle pump operation, followed by 1⁄4 hr. full
load operation.
One.
Continuous operation at 15
pct. load followed by 1 hr.
at full load.
1⁄12.
1⁄12.

Subpart 111.30—Switchboards
§ 111.30–1

§ 111.30–5

(a) All low voltage and medium voltage switchboards (as low and medium
are determined within the standard
used) must meet—
(1) For low voltages, either section
8.3 of IEEE 45–2002 or IEC 60092–302
(both incorporated by reference; see 46
CFR 110.10–1), as appropriate.
(2) For medium voltages, either section 8.4 of IEEE 45–2002 or IEC 92–503
(incorporated by reference; see 46 CFR
110.10–1), as appropriate.
(b) Each switchboard must be fitted
with a dripshield unless the switchboard is a deck-to-overhead mounted
type which cannot be subjected to
leaks or falling objects.
[CGD 94–108, 61 FR 28278, June 4, 1996, as
amended at 62 FR 23908, May 1, 1997; USCG–
2003–16630, 73 FR 65196, Oct. 31, 2008]

§ 111.30–11

Location and installation.

Each switchboard must meet the location and installation requirements in
section 8.2 of IEEE 45–2002 or IEC 60092–
302 (both incorporated by reference; see
46 CFR 110.10–1), as applicable.
[USCG–2003–16630, 73 FR 65196, Oct. 31, 2008]

Construction.

Deck coverings.

Non-conducting deck coverings, such
as non-conducting mats or gratings,
suitable for the specific switchboard
voltage must be installed for personnel
protection at the front and rear of the
switchboard and must extend the entire length of, and be of sufficient
width to suit, the operating space.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 62 FR 23908, May 1, 1997]

§ 111.30–3 Accessibility of switchboard
components and connections.

§ 111.30–15

Each component and bus bar connection on a switchboard that is not accessible from the rear, except a bus bar
connection for a draw-out type circuit
breaker, must be within 0.5 m (20 in.) of
the front of the switchboard.

(a) Each device must have a nameplate showing the device’s function.
(b) Each nameplate for a circuit
breaker must show the electrical load
served and the setting of the circuit
breaker.

Nameplates.

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Coast Guard, DHS
§ 111.30–17 Protection
circuits.

§ 111.30–25
of

instrument

(a) Each circuit that supplies a device on a switchboard, except a circuit
under paragraph (b) of this section,
must have overcurrent protection.
(b) A circuit that supplies a device on
a switchboard must not have overload
protection if it supplies:
(1) An electric propulsion control;
(2) A voltage regulator;
(3) A ship’s service generator circuit
breaker tripping control; or
(4) A device that creates a hazard to
the vessel if deenergized.
(c) If short circuit protection is used
in any of the circuits listed in paragraph (b) of this section, it must be set
at not less than 500% of the expected
current.
(d) A secondary circuit of a current
transformer must not be fused, and the
circuit from a current transformer to a
device that is not in the switchboard
must have a high voltage protector to
short the transformer during an open
circuit.

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.30–19

Buses and wiring.

(a) General. Each bus must meet the
requirements of either—
(1) Section 7.10 of IEEE 45–1998 (incorporated by reference; see 46 CFR 110.10–
1); or
(2) IEC 60092–302 (clause 7) (incorporated by reference; see 46 CFR 110.10–
1).
(b) Wiring. Instrumentation and control wiring must be—
(1) Suitable for installation within in
a switchboard enclosure and be rated
at 90 °C or higher;
(2) Stranded copper;
(3) No. 14 AWG (2.10 mm2) or larger or
must be ribbon cable or similar conductor size cable recommended for use
in low-power instrumentation, monitoring, or control circuits by the equipment manufacturer;
(4) Flame-retardant meeting test
VW–1 of UL 1581 or IEC 332–1 (both incorporated by reference; see 46 CFR
110.10–1); and
(5) Extra flexible, if used on a hinged
panel.
[CGD 94–108, 61 FR 28278, June 4, 1996, as
amended at 62 FR 23908, May 1, 1997; USCG–
2003–16630, 73 FR 65197, Oct. 31, 2008]

§ 111.30–24 Generation systems greater
than 3000 kw.
Except on a non-self-propelled mobile
offshore drilling unit (MODU) and a
non-self-propelled floating Outer Continental Shelf facility, when the total installed electric power of the ship’s
service generation system is more than
3000 kW, the switchboard must have
the following:
(a) At least two sections of the main
bus that are connected by:
(1) A non-automatic circuit breaker;
(2) A disconnect switch; or
(3) Removable links.
(b) As far as practicable, the connection of generators and duplicated
equipment equalized between the sections of the main bus.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996]

§ 111.30–25 Alternating-current ship’s
service switchboards.
(a) Except as allowed in paragraph (g)
of this section, each alternating-current ship’s service switchboard must
have the equipment required by paragraphs (b) through (f) of this section.
(b) For each connected generator,
each switchboard must have the following:
(1) A circuit breaker that meets
§ 111.12–11 and § 111.50–5.
(2) A disconnect switch or link for
each generator conductor, except a
switchboard having a draw-out or plugin type generator circuit breaker that
disconnects:
(i) Each generator conductor; or
(ii) If there is a switch in the generator neutral, each ungrounded conductor.
(3) A pilot lamp connected between
the generator and the circuit breaker.
(4) An ammeter with a selector
switch that connects the ammeter to
show the current in each phase.
(5) A voltmeter with a selector
switch that connects the voltmeter to
show the:
(i) Generator voltage of each phase;
and
(ii) Bus voltage of one phase.
(6) A voltage regulator and voltage
regulator functional cut-out switch.
(c) For each generator that is not excited from a variable voltage or rotary

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wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.30–27

46 CFR Ch. I (10–1–11 Edition)

amplifier that is controlled by a voltage regulator unit acting on the exciter field, each switchboard must
have:
(1) A generator field rheostat;
(2) A double-pole field switch;
(3) Discharge clips; and
(4) A discharge resistor.
(d) If generators are arranged for parallel operation, each switchboard must
have:
(1) A speed control for the prime
mover of each generator;
(2) An indicating wattmeter for each
generator; and
(3) A synchroscope and synchronizing
lamp that have a selector switch to
show synchronization for paralleling
generators.
(e) Each switchboard must have the
following:
(1) Ground detection that meets Subpart 111.05 for the:
(i) Ship’s service power system;
(ii) Normal lighting system; and
(iii) Emergency lighting system.
(2) A frequency meter with a selector
switch to connect the meter to each
generator.
(3) An exciter field rheostat.
(f) For each shore power connection
each switchboard must have:
(1) A circuit breaker or fused switch;
(2) A pilot light connected to the
shore side of the circuit breaker or
fused switch; and
(3) One of the voltmeters under paragraph (b)(5) of this section connected to
show the voltage of each phase of the
shore power connection.
(g) The equipment under paragraphs
(b), (d), (e), and (f) of this section, except the equipment under paragraphs
(b)(1), (b)(2), and (f)(1), must be on the
ship’s service switchboard or on a central control console that:
(1) Is in the same control area as the
main ship’s service switchboard or can
remotely control the ship’s service generator circuit breaker;
(2) Has a generator section that has
only generator functions;
(3) Has the generator section segregated from each other console section by a fire-resistant barrier; and
(4) Has cabling from the main switchboard to the generator section of the
console that:

(i) Has only generator control and
generator instrumentation circuits;
and
(ii) Is protected from mechanical
damage.
§ 111.30–27 Direct current ship’s service switchboards.
(a) Each direct current ship’s service
switchboard must have the equipment
required by paragraphs (b) through (f)
of this section.
(b) For each connected generator,
each switchboard must have the following:
(1) A circuit breaker that meets
§ 111.12–11 and § 111.50–5.
(2) A disconnect switch or link for
each generator conductor, except a
switchboard having a draw-out or plugin type generator circuit breaker that
disconnects—
(i) Each conductor; or
(ii) If there is a switch in the generator neutral, each ungrounded conductor.
(3) A field rheostat.
(4) A pilot lamp connected between
the generator and circuit breaker.
(c) For each two-wire generator, each
switchboard must have:
(1) An ammeter; and
(2) A voltmeter with a selector
switch that connects the voltmeter to
show:
(i) Generator voltage; and
(ii) Bus voltage.
(d) For each three-wire generator,
each switchboard must have the following:
(1) An ammeter for:
(i) The positive lead; and
(ii) The negative lead.
(2) A center zero type ammeter for
the neutral ground connection.
(3) A voltmeter with a selector
switch that connects the voltmeter to
show generator and bus voltage:
(i) Positive to negative;
(ii) Positive to neutral; and
(iii) Neutral to negative.
(e) Each switchboard must have
ground detection that meets Subpart
111.05 for the:
(1) Main power system;
(2) Main lighting system; and
(3) Emergency lighting system.
(f) For each shore power connection,
each switchboard must have:

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Coast Guard, DHS

§ 111.33–3

wreier-aviles on DSK3TPTVN1PROD with CFR

(1) A circuit breaker or fused switch;
and
(2) A pilot light connected to the
shore side.
(g) One of the voltmeters under paragraph (c)(2) or (d)(3) of this section
must be connected to show:
(1) For each two-wire system, shore
connection voltage; and
(2) For each three-wire system, shore
connection voltage:
(i) Positive to negative;
(ii) Positive to neutral; and
(iii) Neutral to negative.
§ 111.30–29 Emergency switchboards.
(a) Each emergency generator must
have an emergency switchboard.
(b) There must be a test switch at the
emergency switchboard to simulate a
failure of the normal power source and
cause the emergency loads to be supplied from the emergency power
source.
(c) The emergency switchboard must
be as near as practicable to the emergency power source but not in the same
space as a battery emergency power
source.
(d) Each alternating-current emergency switchboard must have the
equipment required by paragraphs (c)
through (e) of this section.
(e) For each connected emergency
generator, each emergency switchboard
must have:
(1) A circuit breaker that meets
§ 111.12–11;
(2) A disconnect switch or link for
each emergency generator conductor,
except for a switchboard with a draw
out or plug-in type generator circuit
breaker that disconnects:
(i) Each generator conductor; and
(ii) If there is a switch in the generator neutral, each ungrounded conductor; and
(3) A pilot lamp connected between
the generator and circuit breaker.
(f) For each emergency generator
that is not excited from a variable
voltage or rotary amplifier exciter that
is controlled by a voltage regulator
unit acting on the exciter field, each
emergency switchboard must have:
(1) A generator field rheostat;
(2) A double pole field switch;
(3) Discharge clips; and
(4) A discharge resistor.

(g) Each emergency switchboard
must have the following:
(1) An ammeter with a selector
switch that connects the ammeter to
show the current for each phase.
(2) A voltmeter with a selector
switch that connects the voltmeter to
show:
(i) Generator voltage of each phase;
and
(ii) Bus voltage of one phase.
(3) Ground detection that meets subpart 111.05 for the emergency lighting
system.
(4) A frequency meter.
(5) An exciter field rheostat.
(6) A voltage regulator and a voltage
regulator functional cut-out switch.
(h) Each direct-current emergency
switchboard must have the:
(1) Equipment under § 111.30–27 (b)
through (d); and
(2) Ground detection under subpart
111.05 for the emergency lighting system.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996]

Subpart 111.33—Power
Semiconductor Rectifier Systems
§ 111.33–1 General.
This subpart is applicable to all
power semiconductor rectifier systems.
In addition to the regulations contained in this subpart, the requirements of §§ 111.30–11, 111.30–19 and
111.30–21 of this part must be met, if applicable.
§ 111.33–3 Nameplate data.
(a) Each semiconductor rectifier system must have a nameplate of durable
material affixed to the unit that meets
the requirements of—
(1) Section 10.20.12 of IEEE 45–2002
(incorporated by reference; see 46 CFR
110.10–1); or
(2) Clause 8 of IEC 92–304 (incorporated by reference; see 46 CFR 110.10–
1).
(b) Each semiconductor rectifier system must have a nameplate containing
the words ‘‘marine semiconductor rectifier,’’ and the following information:
(1) Manufacturer’s name and address.
(2) Manufacturer’s serial number.
(3) Type.

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§ 111.33–5

46 CFR Ch. I (10–1–11 Edition)

(4) Rated AC volts.
(5) Rated AC amperes.
(6) Number of phases.
(7) Frequency.
(8) Rated DC volts.
(9) Rated DC amperes.
(10) Ambient temperature range.
(11) Duty cycle.
(12) Cooling medium.
(c) If, on small rectifiers, the information required by paragraph (a) of
this section cannot be shown because
of space limitations, the nameplate
must be at least large enough to contain the manufacturer’s name and serial number. The remaining information must be shown on the schematic
diagram.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996; USCG–2003–16630, 73 FR 65197, Oct. 31,
2008]

§ 111.33–5 Installation.
Each semiconductor rectifier system
must meet the installation requirements, as appropriate, of—
(a) Sections 10.20.2, 10.20.7, and 10.20.8
of IEEE 45–2002 (incorporated by reference; see 46 CFR 110.10–1); or
(b) IEC 92–304 (incorporated by reference; see 46 CFR 110.10–1).

[USCG–2003–16630, 73 FR 65197, Oct. 31, 2008]

Subpart 111.35—Electric
Propulsion
§ 111.35–1 Electrical propulsion installations.
Each electric propulsion installation
must meet sections 4–8–5/5.5, 4–8–5/5.11,
4–8–5/5.13, 4–8–5/5.17.8(e), 4–8–5/5.17.9, and
4–8–5/5.17.10 of ABS Steel Vessel Rules
(incorporated by reference; see 46 CFR
110.10–1), except that each one for mobile offshore drilling units must meet
the requirements in part 4, chapter 3,
section 4/3.5.3 of ABS MODU Rules (incorporated by reference; see 46 CFR
110.10–1).
[USCG–2003–16630, 73 FR 65197, Oct. 31, 2008]

Subpart 111.40—Panelboards
§ 111.40–1

Panelboard standard.

Each panelboard must meet section
17.1 of IEEE 45–2002 (incorporated by
reference; see 46 CFR 110.10–1).

[CGD 94–108, 61 FR 28279, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65197,
Oct. 31, 2008]

[USCG–2003–16630, 73 FR 65197, Oct. 31, 2008]

§ 111.33–7 Alarms and shutdowns.
Each power semiconductor rectifier
must have a high temperature alarm or
shutdown, except as provided in
§ 111.33–11.

Each panelboard must have a noncombustible enclosure that meets
§§ 111.01–7 and 111.01–9.

§ 111.33–9 Ventilation exhaust.
The exhaust of each forced-air semiconductor rectifier system must:
(a) Terminate in a location other
than a hazardous location under Subpart 111.105 of this part; and
(b) Not impinge upon any other electric device.

wreier-aviles on DSK3TPTVN1PROD with CFR

the requirements in Part 4, Chapter 3,
section 4/3.5.3 of ABS MODU Rules (incorporated by reference; see 46 CFR
110.10–1).

§ 111.33–11 Propulsion systems.
Each power semiconductor rectifier
system in a propulsion system must
meet sections 4–8–5/5.17.9 and 4–8–5/
5.17.10 of ABS Steel Vessel Rules (incorporated by reference; see 46 CFR
110.10–1), except that each one for mobile offshore drilling units must meet

§ 111.40–5

Enclosure.

[CGD 94–108, 61 FR 28279, June 4, 1996]

§ 111.40–7

Location.

Each panelboard must be accessible
but not in a bunker or a cargo hold, except a cargo hold on a roll-on/roll-off
vessel.
[CGD 94–108, 61 FR 28279, June 4, 1996]

§ 111.40–9

Locking device.

The door of each panelboard enclosure that is accessible to any passenger
must have a locking device.
§ 111.40–11 Numbered switching unit
and panelboard directory.
(a) Each panelboard switching unit
must be numbered.
(b) Each panelboard must have:

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Coast Guard, DHS

§ 111.50–3

(1) A circuit directory cardholder;
and
(2) A circuit directory that has:
(i) The circuit designation of each
circuit;
(ii) A description of the load of each
circuit; and
(iii) The rating or setting of the overcurrent protective device for each circuit.
§ 111.40–13 Rating.
Each panelboard must have a current
rating not less than the feeder circuit
capacity.
§ 111.40–15 Overcurrent device.
The total load on any overcurrent device located in a panelboard must not
exceed 80 percent of its rating if, in
normal operation, the load will continue for 3 hours or more; except if the
assembly, including the overcurrent
device, is rated for continuous duty at
100% of its rating.

Subpart 111.50—Overcurrent
Protection
§ 111.50–1 Protection of equipment.
Overcurrent protection of electric
equipment must meet the following
listed subparts of this chapter:
(a) Appliances, Subpart 111.77.
(b) Generators, Subpart 111.12.
(c) Motors, motor circuits, and controllers, Subpart 111.70.
(d) Transformers, Subpart 111.20.
§ 111.50–2 Systems integration.
The electrical characteristics of each
overcurrent protective device must be
compatible with other devices and its
coordination must be considered in the
design of the entire protective system.
NOTE TO § 111.50–2: The electrical characteristics of overcurrent protective devices may
differ between standards. The interchangeability and compatibility of components
complying with differing standards cannot
be assumed.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 61 FR 28279, June 4, 1996]

§ 111.50–3 Protection of conductors.
(a) Purpose. The purpose of overcurrent protection for conductors is to
open the electric circuit if the current
reaches a value that will cause an ex-

cessive or dangerous temperature in
the conductor or conductor insulation.
A grounded conductor is protected
from overcurrent if a protective device
of a suitable rating or setting is in
each ungrounded conductor of the same
circuit.
(b) Overcurrent protection of conductors. Each conductor must be protected
in accordance with its current carrying
capacity, except a conductor for the
following circuits which must meet the
following listed subparts of this chapter:
(1) Propulsion circuits, Subpart
111.35.
(2) Steering circuits, subchapter F of
this chapter.
(3) Motor circuits, Subpart 111.70.
(4) Flexible cord and fixture wire for
lighting circuits, Subpart 111.75.
(5) Switchboard circuits, Subpart
111.30.
(c) Fuses and circuitbreakers. If the allowable current-carrying capacity of
the conductor does not correspond to a
standard
rating
for
fuses
or
circuitbreakers that meets Section
240.6 of NFPA NEC 2002 or IEC 92–202
(both incorporated by reference; see 46
CFR 110.10–1), then the next larger such
rating is acceptable, except that:
(1) This rating must not be larger
than 150 percent of the current-carrying capacity of the conductor; and
(2) The effect of temperature on the
operation of fuses and thermally controlled circuitbreakers must be taken
into consideration.
(d) Parallel overcurrent protective devices. An overcurrent protective device
must not be connected in parallel with
another overcurrent protective device.
(e) Thermal devices. No thermal cutout, thermal relay, or other device not
designed to open a short circuit may be
used for protection of a conductor
against overcurrent due to a short circuit or ground, except in a motor circuit as described in Article 430 of
NFPA NEC 2002 or in IEC 92–202.
(f) Ungrounded conductors. A fuse or
overcurrent trip unit of a circuit
breaker must be in each ungrounded
conductor. A branch switch or circuit
breaker must open all conductors of
the circuit, except grounded conductors.

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§ 111.50–5

46 CFR Ch. I (10–1–11 Edition)

(g) Grounded conductor. An overcurrent device must not be in a permanently grounded conductor, except:
(1) An overcurrent device that simultaneously opens all conductors of the
circuit, unless prohibited by § 111.05–17
for the bus-tie feeder connecting the
emergency and main switchboards; and
(2) For motor-running protection described in Article 430 of NFPA NEC 2002
or in IEC 92–202.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996; CGD 97–057, 62 FR 51047, Sept. 30, 1997;
USCG–2003–16630, 73 FR 65197, Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.50–5 Location of overcurrent protective devices.
(a) Location in circuit. Overcurrent devices must be at the point where the
conductor to be protected receives its
supply, except as follows:
(1) The generator overcurrent protective device must be on the ship’s service generator switchboard. (See § 111.12–
11(g) for additional requirements.)
(2) The overcurrent protection for the
shore connection conductors must
meet § 111.30–25.
(3) If the overcurrent device that protects the larger conductors also protects the smaller conductors, an overcurrent device is not required at the
supply to the smaller conductors.
(4) If the overcurrent device protecting the primary side of a single
phase transformer (two wire with single-voltage secondary) also protects
the conductors connected to the secondary side, as determined by multiplying the current-carrying capacity of
the secondary conductor by the secondary to primary transformer voltage
ratio, and this protection meets
§ 111.20–15 of this chapter, an overcurrent device is not required at the supply to the secondary side conductors.
(b) Location on vessel. Each overcurrent device:
(1) Must be:
(i) Readily accessible; and
(ii) In a distribution panelboard,
switchboard, motor controller, or similar enclosure; and
(2) Must not be:
(i) Exposed to mechanical damage;
and

(ii) Near an easily ignitable material
or where explosive gas or vapor may
accumulate.
§ 111.50–7 Enclosures.
(a) Each enclosure of an overcurrent
protective device must meet Sections
240–30 and 240–33 of NFPA NEC 2002 (incorporated by reference; see 46 CFR
110.10–1).
(b) No enclosure may be exposed to
the weather unless accepted by the
Commandant.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2003–16630, 73 FR 65197,
Oct. 31, 2008]

§ 111.50–9 Disconnecting and guarding.
Disconnecting and guarding of overcurrent protective devices must meet
Part IV of Article 240 of NFPA NEC
2002 (incorporated by reference; see 46
CFR 110.10–1).
[USCG–2003–16630, 73 FR 65197, Oct. 31, 2008]

Subpart 111.51—Coordination of
Overcurrent Protective Devices
§ 111.51–1 Purpose.
The purpose of this subpart is to provide continuity of service for equipment vital to the propulsion, control or
safety of the vessel under short-circuit
conditions through coordination and
selective operation of overcurrent protective devices.
§ 111.51–3 Protection of vital equipment.
(a) The coordination of overcurrent
protective devices must be demonstrated for all potential plant configurations.
(b)Overcurrent protective devices
must be installed so that:
(1) A short-circuit on a circuit that is
not vital to the propulsion, control, or
safety of the vessel does not trip equipment that is vital; and
(2) A short-circuit on a circuit that is
vital to the propulsion, control, or
safety of the vessel is cleared only by
the protective device that is closest to
the point of the short-circuit.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 62 FR 23908, May 1,
1997]

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Coast Guard, DHS

§ 111.54–1

Subpart 111.52—Calculation of
Short-Circuit Currents
§ 111.52–1

General.

The available short-circuit current
must be computed—
(a) From the aggregate contribution
of all generators that can simultaneously operate in parallel;
(b) From the largest probable motor
load; and
(c) With a three phase fault on the
load terminals of the protective device.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996]

§ 111.52–3 Systems
watts.

below

1500

kilo-

The following short-circuit assumptions must be made for a system with
an aggregate generating capacity
below 1500 kilowatts, unless detailed
computations in accordance with
§ 111.52–5 are submitted:
(a) The maximum short-circuit current of a direct current system must be
assumed to be 10 times the aggregate
normal rated generator currents plus
six times the aggregate normal rated
currents of all motors that may be in
operation.
(b) The maximum asymmetrical
short-circuit current for an alternating
current system must be assumed to be
10 times the aggregate normal rated
generator currents plus four times the
aggregate normal rated currents of all
motors that may be in operation.
(c) The average asymmetrical shortcircuit current for an alternating-current system must be assumed to be 81⁄2
times the aggregate normal rated generator currents plus 31⁄2 times the aggregate normal rated currents of all
motors that may be in operation.

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.52–5 Systems 1500 kilowatts or
above.
Short-circuit calculations must be
submitted for systems with an aggregate generating capacity of 1500 kilowatts or more by utilizing one of the
following methods:
(a) Exact calculations using actual
impedance and reactance values of system components.

(b) Estimated calculations using
NAVSEA DDS 300–2 (incorporated by
reference, see 46 CFR 110.10–1).
(c) Estimated calculations using IEC
61363–1 (incorporated by reference; see
46 CFR 110.10–1).
(d) The estimated calculations using
a commercially established analysis
procedure for utility or industrial applications.
[CGD 94–108, 61 FR 28279, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65197,
Oct. 31, 2008]

Subpart 111.53—Fuses
§ 111.53–1 General.
(a) Each fuse must—
(1) Meet the general provisions of Article 240 of NFPA NEC 2002 or IEC 92–
202 (both incorporated by reference; see
46 CFR 110.10–1) as appropriate.
(2) Have an interrupting rating sufficient to interrupt the asymmetrical
RMS short-circuit current at the point
of application; and
(3) Be listed by an independent laboratory.
(b) Renewable link cartridge-type
fuses must not be used.
(c) Each fuse installation must provide for ready access to test the condition of the fuse.
[CGD 94–108, 61 FR 28279, June 4, 1996, as
amended by61 FR 33045, June 26, 1996; USCG–
2003–16630, 73 FR 65197, Oct. 31, 2008]

Subpart 111.54—Circuit Breakers
§ 111.54–1 Circuit breakers.
(a) Each Circuit breaker must—
(1) Meet the general provision of Article 240 of NFPA NEC 2002 or IEC 92–
202 (both incorporated by reference; see
46 CFR 110.10–1) as appropriate;
(2) Meet subpart 111.55 of this part;
and
(3) Have an interrupting rating sufficient to interrupt the maximum asymmetrical short-circuit current available at the point of application.
(b) No molded-case circuitbreaker
may be used in any circuit having a
nominal voltage of more than 600 volts
(1,000 volts for a circuit containing a
circuitbreaker manufactured to the
standards of the IEC). Each moldedcase circuitbreaker must meet section

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§ 111.54–3

46 CFR Ch. I (10–1–11 Edition)

wreier-aviles on DSK3TPTVN1PROD with CFR

9 and marine supplement SA of UL 489
(incorporated by reference, see 46 CFR
110.10–1) or part 2 of IEC 60947–2 (incorporated by reference; see § 110.10–1), except as noted in paragraph (e) of this
section.
(c) Each circuitbreaker, other than a
molded-case one, that is for use in any
of the following systems must meet the
following requirements:
(1) An alternating-current system
having a nominal voltage of 600 volts
or less (1,000 volts for such a system
with circuitbreakers manufactured to
the standards of the IEC) must meet:
(i) IEEE C37.13 (incorporated by reference; see 46 CFR 110.10–1);
(ii) ANSI/IEEE C37.27 (incorporated
by reference; see 46 CFR 110.10–1); or
(iii) IEC 60947–2.
(2) A direct-current system of 3,000
volts or less must meet IEEE C37.14
(incorporated by reference; see 46 CFR
110.10–1) or IEC 60947–2.
(3) An alternating-current system
having a nominal voltage greater than
600 volts (or greater than 1,000 volts for
IEC standard circuitbreakers) must
meet:
(i) IEEE C37.04, IEEE C37.010, and
ANSI/IEEE C37.12 (all three standards
incorporated by reference; see 46 CFR
110.10–1); or
(ii) IEC 62271–100 (incorporated by reference; see 46 CFR 110.10–1).
(d) A circuit breaker must not:
(1) Be dependent upon mechanical
cooling to operate within its rating; or
(2) Have a long-time-delay trip element set above the continuous current
rating of the trip element or of the circuit breaker frame.
(e) Each circuit breaker located in an
engineroom, boilerroom, or machinery
space must be calibrated for a 50 degree
C ambient temperature. If the circuit
breaker is located in an environmentally controlled machinery control
room where provisions are made for ensuring an ambient temperature of 40
degree C or less, a circuit breaker must
have at least the standard 40 degrees C
ambient temperature calibration.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28279, June 4,
1996; 61 FR 33045, June 26, 1996; 62 FR 23908,
May 1, 1997; USCG–2003–16630, 73 FR 65197,
Oct. 31, 2008]

§ 111.54–3

Remote control.

Remotely controlled circuit breakers
must have local manual means of operation.
[CGD 81–030, 53 FR 17847, May 18, 1988]

Subpart 111.55—Switches
§ 111.55–1

General.

(a) Each switch must meet Article
404 of NFPA NEC 2002 (incorporated by
reference; see 46 CFR 110.10–1).
(b) Each switch that is in the weather must be in a watertight enclosure
and be externally operable.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2003–16630, 73 FR 65198,
Oct. 31, 2008]

§ 111.55–3

Circuit connections.

The load side of each circuit must be
connected to the fuse end of a fusedswitch or to the coil end of a circuit
breaker, except a generator which is
connected to either end of a circuit
breaker.

Subpart 111.59—Busways
§ 111.59–1

General.

Each busway must meet Article 368
of NFPA NEC 2002 (incorporated by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65198, Oct. 31, 2008]

§ 111.59–3

No mechanical cooling.

A busway must not need mechanical
cooling to operate within its rating.
[CGD 94–108, 61 FR 28280, June 4, 1996]

Subpart 111.60—Wiring Materials
and Methods
§ 111.60–1 Construction and testing of
cable.
(a) Each marine shipboard cable must
meet all the requirements for construction and identification of either IEEE
1580, UL 1309, IEC 92–353, or NPFC MIL–
C–24640A or NPFC MIL–C–24643A (all
five standards incorporated by reference; see 46 CFR 110.10–1), including
the respective flammability tests contained therein, and must be of a copper-stranded type.

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Coast Guard, DHS

§ 111.60–5

(b) Each cable constructed to IEC 92–
353 must meet the flammability requirements of Category A of IEC 60332–
3–22 (incorporated by reference; see 46
CFR 110.10–1).
(c) Medium-voltage electric cable
must meet the requirements of IEEE
1580 and UL 1072 (incorporated by reference; see 46 CFR 110.10–1), where applicable, for cables rated above 5,000
volts.
(d) Electrical cable that has a polyvinyl-chloride insulation with a nylon
jacket (Type T/N) must meet either UL
1309, IEEE 1580, or section 8 of IEEE 45–
2002 (incorporated by reference; see 46
CFR 110.10–1).
(e) Electrical cable regardless of construction must meet, at a minimum,
all of the performance and marking requirements of section 5.13 of IEEE 1580.
[USCG–2003–16630, 73 FR 65198, Oct. 31, 2008]

§ 111.60–2 Specialty cable for communication and RF applications.
Specialty cable such as certain coaxial cable that cannot pass the flammability test contained in IEEE 1580,
test VW–1 of UL 1581, or Category A of
IEC 60332–3–22 (all three standards incorporated by reference; see 46 CFR
110.10–1) because of unique properties of
construction, must:
(a) Be installed physically separate
from all other cable; and
(b) Have fire stops installed—
(1) At least every 7 meters (21.5 feet)
vertically, up to a maximum of 2 deck
heights;
(2) At least every 15 meters (46 feet)
horizontally;
(3) At each penetration of an A or B
Class boundary;
(4) At each location where the cable
enters equipment; or
(5) In a cableway that has an A–60
fire rating.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 61 FR 28280, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65198,
Oct. 31, 2008]

§ 111.60–3 Cable application.
(a)(1) Cable constructed according to
IEEE 1580 must meet the provisions for
cable application of section 24 of IEEE
45–2002 (both incorporated by reference;
see 46 CFR 110.10–1).
(2) Cable constructed according to
IEC 92–353 or UL 1309 (both incor-

porated by reference; see 46 CFR 110.10–
1) must meet section 24 of IEEE 45–2002,
except 24.6.1, 24.6.7, and 24.8.
(3) Cable constructed according to
IEC 92–353 must be applied in accordance with IEC 60092–352 (incorporated
by reference; see 46 CFR 110.10–1), Table
1, for ampacity values.
(b)(1) Cable constructed according to
IEEE 1580 must be applied in accordance with Table 25, Note 6, of IEEE 45–
2002.
(2) Cable constructed according to
IEC 92–353 must be derated according
to IEC 60092–352, clause 8.
(3) Cable constructed according to
NPFC MIL–C–24640A or NPFC MIL–C–
24643A must be derated according to
NAVSEA MIL–HDBK–299 (SH) (all
three standards incorporated by reference; see 46 CFR 110.10–1).
(c) Cable for special applications defined in section 24 of IEEE 45–2002 must
meet the provisions of that section.
[USCG–2003–16630, 73 FR 65198, Oct. 31, 2008]

§ 111.60–4
size.

Minimum

cable

conductor

Each cable conductor must be #18
AWG (0.82 mm2) or larger except—
(a) Each power and lighting cable
conductor must be #14 AWG (2.10 mm2)
or larger; and
(b) Each thermocouple, pyrometer, or
instrumentation cable conductor must
be #22 AWG (0.33 mm2) or larger.
[CGD 94–108, 61 FR 28280, June 4, 1996]

§ 111.60–5

Cable installation.

(a) Each cable installation must
meet—
(1) Sections 25, except 25.11, of IEEE
45–2002 (incorporated by reference; see
46 CFR 110.10–1); or
(2) Cables manufactured to IEC 92–353
must be installed in accordance with
IEC 60092–352 (both incorporated by reference; see 46 CFR 110.10–1), including
clause 8.
(b) Each cable installation made in
accordance with clause 8 of IEC 60092–
352
must
utilize
the
conductor
ampacity values of Table I of IEC
60092–352.
(c) No cable may be located in any
tank unless—

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§ 111.60–6

46 CFR Ch. I (10–1–11 Edition)

(1) The purpose of the cable is to supply equipment or instruments especially designed for and compatible with
service in the tank and whose function
requires the installation of the cable in
the tank;
(2) The cable is either compatible
with the liquid or gas in the tank or
protected by an enclosure; and
(3) Neither braided cable armor nor
cable metallic sheath is used as the
grounding conductor.
(d) Braided cable armor or cable metallic sheath must not be used as the
grounding conductor.

§ 111.60–6

Fiber optic cable.

Each fiber optic cable must—
(a) Be constructed to pass the flammability test contained in IEEE 1202,
test VW–1 of UL 1581, or Category A of
IEC 60332–3–22 (all three standards incorporated by reference; see 46 CFR
110.10–1); or
(b) Be installed in accordance with
§ 111.60–2.
[CGD 94–108, 61 FR 28280, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65198,
Oct. 31, 2008]

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28280, June 4,
1996; USCG–2003–16630, 73 FR 65198, Oct. 31,
2008]

§ 111.60–7 Demand loads.
Generator, feeder, and bus-tie cables must be selected on the basis of a computed load of not less than the demand load given in Table 111.60–7.
TABLE 111.60–7—DEMAND LOADS
Type of circuit

Demand load

Generator cables .........................................................
Switchboard bus-tie, except ship’s service to emergency switchboard bus-tie.
Emergency switchboard bus-tie ...................................
Motor feeders ...............................................................
Galley equipment feeder ..............................................

Lighting feeder .............................................................
Grounded neutral of a dual voltage feeder .................

115 percent of continuous generator rating.
75 percent of generating capacity of the larger switchboard.
115 percent of continuous rating of emergency generator.
Article 430, NFPA NEC 2002 (incorporated by reference; see 46 CFR
110.10–1).
100 percent of either the first 50 KW or one-half the connected load,
whichever is the larger, plus 65 percent of the remaining connected
load, plus 50 percent of the rating of the spare switches or circuit
breakers on the distribution panel.
100 percent of the connected load plus the average active circuit load
for the spare switches or circuit breakers on the distribution panels.
100 percent of the capacity of the ungrounded conductors when grounded neutral is not protected by a circuit breaker overcurrent trip, or not
less than 50 percent of the capacity of the ungrounded conductors
when the grounded neutral is protected by a circuit breaker overcurrent trip or overcurrent alarm.

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2004–18884, 69 FR 58348,
Sept. 30, 2004; USCG–2003–16630, 73 FR 65198,
Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.60–9

Segregation of vital circuits.

(a) General. A branch circuit that
supplies equipment vital to the propulsion, control, or safety of the vessel
must not supply any other equipment.
(b) Passenger vessels. (1) Each passenger vessel with firescreen bulkheads
that form main fire zones must have
distribution systems arranged so that
fire in a main fire zone does not inter-

fere with essential services in another
main fire zone.
(2) Main and emergency feeders passing through a main fire zone must be
separated vertically and horizontally
as much as practicable.
§ 111.60–11 Wire.
(a) Wire must be in an enclosure.
(b) Wire must be component insulated.
(c) Wire, other than in switchboards,
must meet the requirements in sections 24.6.7 and 24.8 of IEEE 45–2002,
NPFC MIL–W–76D, UL 44, UL 83 (all

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Coast Guard, DHS

§ 111.60–23

four standards incorporated by reference; see 46 CFR 110.10–1), or equivalent standard.
(d) Switchboard wire must meet subpart 111.30 of this part.
(e) Wire must be of the copper stranded type.
[CGD 94–108, 61 FR 28281, June 4, 1996, as
amended at 62 FR 23908, May 1, 1997; 62 FR
27659, May 20, 1997; USCG–2003–16630, 73 FR
65198, Oct. 31, 2008]

§ 111.60–13 Flexible electric cord and
cables.
(a) Construction and testing. Each
flexible cord and cable must meet the
requirements in section 24.6.1 of IEEE
45–2002, Article 400 of NFPA NEC 2002,
NEMA WC–3, NEMA WC–70, or UL 62
(all five standards incorporated by reference; see 46 CFR 110.10–1).
(b) Application. No flexible cord may
be used except:
(1) As allowed under Sections 400–7
and 400–8 of NFPA NEC 2002; and
(2) In accordance with Table 400–4 in
NFPA NEC 2002.
(c) Allowable current-carrying capacity.
No flexible cord may carry more current than allowed under Table 400–5 in
NFPA NEC 2002, NEMA WC–3, or NEMA
WC–70.
(d) Conductor size. Each flexible cord
must be No. 18 AWG (0.82 mm2) or larger.
(e) Splices. Each flexible cord and
cable must be without splices or taps
except for a cord or cable No. 12 AWG
(3.3 mm2) or larger spliced for repairs
in accordance with § 111.60–19.
(f) Pull at joints and terminals. Each
flexible cord and cable must be connected to a device or fitting by a knot,
tape, or special fitting so that tension
is not transmitted to joints or terminal
screws.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28281, June 4,
1996; USCG–2003–16630, 73 FR 65198, Oct. 31,
2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.60–17 Connections
nations.

and

termi-

(a) In general, connections and terminations to all conductors must retain
the original electrical, mechanical,
flame-retarding, and, where necessary,
fire-resisting properties of the cable.

All connecting devices must be suitable for copper stranded conductors.
(b) If twist-on type of connectors are
used, the connections must be made
within an enclosure and the insulated
cap of the connector must be secured
to prevent loosening due to vibration.
(c) Twist-on type of connectors may
not be used for making joints in cables,
facilitating a conductor splice, or extending the length of a circuit.
[CGD 94–108, 61 FR 28281, June 4, 1996]

§ 111.60–19 Cable splices.
(a) A cable must not be spliced in a
hazardous location, except in intrinsically safe systems.
(b) Each cable splice must be made in
accordance with section 25.11 of IEEE
45–2002 (incorporated by reference; see
46 CFR 110.10–1).
[CGD 94–108, 61 FR 28281, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65198,
Oct 31, 2008]

§ 111.60–21 Cable insulation tests.
All cable for electric power and lighting and associated equipment must be
checked for proper insulation resistance to ground and between conductors. The insulation resistance must
not be less than that in section 34.2.1 of
IEEE 45–2002 (incorporated by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65199, Oct. 31, 2008]

§ 111.60–23 Metal-clad
(Type
MC)
cable.
(a) Metal-clad (Type MC) cable permitted on board a vessel must be continuous corrugated metal-clad cable.
(b) The cable must have a corrugated
gas-tight, vapor-tight, and watertight
sheath of aluminum or other suitable
metal that is close-fitting around the
conductors and fillers and that has an
overall jacket of an impervious PVC or
thermoset material.
(c) The cable is not allowed in areas
or applications exposed to high vibration, festooning, repeated flexing, excessive movement, or twisting, such as
in engine rooms, on elevators, or in the
area of drill floors, draw works, shakers, and mud pits.
(d) The cable must be installed in accordance with Article 326 of NFPA NEC
2002 (incorporated by reference; see 46

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§ 111.70–1

46 CFR Ch. I (10–1–11 Edition)

CFR 110.10–1). The ampacity values
found in table 25 of IEEE 45–2002 (incorporated by reference; see 46 CFR 110.10–
1) may not be used.
(e) The side wall pressure on the
cable must not exceed 1,000 pounds per
foot of radius.
(f) Equipment grounding conductors
in the cable must be sized in accordance with Section 250.122 of NFPA NEC
2002. System grounding conductors
must be of a cross-sectional area not
less than that of the normal current
carrying conductors of the cable. The
metal sheath must be grounded but
must not be used as a required grounding conductor.
(g) On an offshore floating drilling
and production facility, the cable may
be used as interconnect cable between
production modules and between fixed
distribution panels within the production modules, except that interconnection between production and temporary drilling packages is prohibited.
Also, the cable may be used within columns, provided that the columns are
not subject to the conditions described
in paragraph (c) of this section.
(h) When the cable is used within a
hazardous (classified) location, terminations or fittings must be listed, and
must be appropriate, for the particular
Type MC cable used and for the environment in which they are installed.
[CGD 94–108, 62 FR 23908, May 1, 1997, as
amended by USCG–2003–16630, 73 FR 65199,
Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 111.70—Motor Circuits,
Controllers, and Protection
§ 111.70–1 General.
(a) Each motor circuit, controller,
and protection must meet the requirements of ABS Steel Vessel Rules, sections 4–8–2/9.17, 4–8–3/5.7.3, 4–8–4/9.5, and
4–8–3/5; ABS MODU Rules, Part 4, Chapter 3, sections 4/7.11 and 4/7.17; or IEC
92–301 (all three standards incorporated
by reference; see 46 CFR 110.10–1), as
appropriate, except for the following
circuits:
(1) Each steering gear motor circuit
and protection must meet part 58, subpart 58.25, of this chapter.
(2) Each propulsion motor circuit and
protection must meet subpart 111.35 of
this part.

(b) In ungrounded three-phase alternating current systems, only two
motor-running
protective
devices
(overload coil or heater type relay
within the motor and controller) need
be used in any two ungrounded conductors, except when a wye-delta or a
delta-wye transformer is used.
(c) The motor disconnecting means
must be an externally operable switch
or circuit breaker.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28281, June 4,
1996; 62 FR 23909, May 1, 1997; USCG–2003–
16630, 73 FR 65199, Oct. 31, 2008]

§ 111.70–3 Motor
controllers
and
motor-control centers.
(a) General. The enclosure for each
motor controller or motor-control center must meet either NEMA ICS 2 and
NEMA ICS 2.3, or Table 5 of IEC 92–201
(all three standards incorporated by
reference; see 46 CFR 110.10–1), as appropriate, for the location where it is
installed. In addition, each such enclosure in a hazardous location must meet
subpart 111.105 of this part. NEMA ICS
2.4 (incorporated by reference; see 46
CFR 110.10–1) provides guidance on the
differences between devices meeting
NEMA and those meeting IEC for
motor service.
(b) Low-voltage release. Each motor
controller for a fire pump, elevator,
steering gear, or auxiliary that is vital
to the vessel’s propulsion system, except a motor controller for a vital propulsion auxiliary which can be restarted from a central control station,
must have low-voltage release if automatic restart after a voltage failure or
its resumption to operation is not hazardous. If automatic restart is hazardous, the motor controller must have
low-voltage protection. Motor controllers for other motors must not have
low-voltage release unless the starting
current and the short-time sustained
current of the additional low-voltage
release load is within the capacity of
one ship’s service generator. Automatic sequential starting of low-voltage release controllers is acceptable to
meet this paragraph.
(c) Low-voltage protection. Each motor
controller must have low-voltage protection, except for the following motor
controllers:

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Coast Guard, DHS

§ 111.70–7

(1) A motor controller that has lowvoltage release under paragraph (b) of
this section.
(2) A motor controller for a motor of
less than 2 horsepower (1.5 kW).
(d) Identification of controllers. (1)
Each motor controller and motor control center must be marked externally
with the following information:
(i) Manufacturer’s name or identification.
(ii) Voltage.
(iii) Number of phases.
(iv) Current.
(v) kW (Horsepower).
(vi) Identification of motor being
controlled.
(vii) Current rating of trip setting.
(2) Each controller must be provided
with heat durable and permanent elementary wiring/schematic diagrams of
the controller located on the door interior.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 94–108, 61 FR 28281, June 4, 1996; 61 FR
33045, June 26, 1996, as amended by USCG–
2003–16630, 73 FR 65199, Oct. 31, 2008]

§ 111.70–5 Heater circuits.
(a) If an enclosure for a motor, master switch, or other equipment has an
electric heater inside the enclosure
that is energized from a separate circuit, the heater circuit must be disconnected from its source of potential by a
disconnect device independent of the
enclosure containing the heater. The
heater disconnecting device must be
adjacent
to
the
equipment
disconnecting device. A fixed sign, warning the operator to open both devices,
must be on the enclosure of the equipment disconnect device, except as in
paragraph (b) of this section.
(b) If the location of the enclosure for
a motor, master switch, or other equipment for deck machinery is remote
from the motor and controller disconnect device, a sign must be fixed to
the enclosure if the disconnect arrangement required by paragraph (a) of
this section is not used. The sign must
warn the operator of the presence of
two sources of potential within the enclosure and show the location of the
heater circuit disconnect device.
(c) Electric heaters installed within
motor controllers and energized from a
separate circuit must be disconnected
in the same manner as required by

paragraph (a) of this section or by
§ 111.70–7(d).
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996]

§ 111.70–7 Remote control, interlock,
and indicator circuits.
(a) Overcurrent protection. A conductor of a control, interlock, or indicator circuit of a motor controller
must be protected against overcurrent
unless:
(1) The conductor is wholly within
the controller enclosure;
(2) The rating or setting of the
branch circuit overcurrent device is
not more than 300 percent of the current-carrying capacity of the control,
interlock, or indicator circuit conductor;
(3) There is an overcurrent device in
each side of the line that has a rating
or setting of not more than 300 percent
of the current-carrying capacity of the
control, electrical interlock, or indicator circuit conductor, except if under
operating conditions there is no appreciable difference in potential between
the external conductors, overcurrent
protection need only be at the supply
of that side of the line; or
(4) The opening of the control, interlock, or indicator circuit creates a hazard.
NOTE: For overcurrent protection of steering gear control and indicator circuits, see
Subpart 111.93 of this chapter.

(b) Accidental ground. The controller
must be designed to prevent an accidental ground in a remote control circuit from causing the stop switches to
fail to operate or causing the motor to
start.
(c) Source of potential. The potential
for a control, interlock, or indicator
circuit must be derived from the load
side of the motor and controller disconnect device, except if the control
functions require circuits that must be
common to two or more controllers,
the switching arrangement in paragraph (d) of this section must be met.
(d) Switching. In the design of a control, interlock, or indicator circuit, all
practicable steps must be taken to
eliminate all but one source of power
in an enclosure. If the control functions make it impracticable to energize

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§ 111.75–1

46 CFR Ch. I (10–1–11 Edition)

a control interlock or indicator circuit
from the load side of a motor and controller disconnect device and the voltage of the control, interlock, or indicator circuit is more than 24 volts,
there must be one of the following alternative methods of switching:
(1) Each conductor of a control,
interlock, or indicator circuit must be
disconnected from all sources of potential by a disconnect device independent
of the motor and controller disconnect
device. The two independent devices
must be adjacent to each other, and a
fixed sign, warning the operator to
open both devices to disconnect completely the motor and controller, must
be on the exterior of the door of the
main disconnect device.
(2) Each conductor of a control,
interlock, or indicator circuit must be
disconnected from all sources of power
by a disconnect device actuated by the
opening of the controller door, or the
power must first be disconnected to
allow opening of the door. The disconnect device and its connections, including each terminal block for terminating the vessel’s wiring, must have
no
electrically
uninsulated
or
unshielded surface. When this type of
disconnect device is used for vital auxiliary circuits, a nameplate must be affixed to the vital auxiliary motor controller door that warns that opening
the door will trip a vital auxiliary offline.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996; 62 FR 23909, May 1, 1997]

wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 111.75—Lighting Circuits
and Protection
§ 111.75–1 Lighting feeders.
(a) Passenger vessels. On a passenger
vessel with fire bulkheads forming
main vertical and horizontal fire zones,
the lighting distribution system, including low location egress lighting
where installed, must be arranged so
that, to the maximum extent possible,
a fire in any main vertical and horizontal fire zone does not interfere with
the lighting in any other fire zone.
This requirement is met if main and
emergency feeders passing through any
zone are separated both vertically and
horizontally as widely as practicable.

(b) Machinery spaces. Lighting for
enginerooms, boilerrooms, and auxiliary machinery spaces must be supplied from two or more feeders. One of
these feeders must be a ship’s service
feeder.
NOTE: Special requirements for emergency
lighting, feeders, and branch circuits are in
subpart 112.43 of this chapter.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996; 61 FR 33045, June 26, 1996]

§ 111.75–5 Lighting branch circuits.
(a) Loads. A lighting distribution
panel must not supply branch circuits
rated at over 30 amperes.
(b) Connected Load. The connected
loads on a lighting branch circuit must
not be more than 80 percent of the rating of the overcurrent protective device, computed on the basis of the fixture ratings and in accordance with
IEEE 45–2002 (incorporated by reference; see 46 CFR 110.10–1), section
5.4.2.
(c) Lighting fixtures on lighting circuits. Each lighting fixture must be on
a lighting branch circuit.
(d) Overcurrent protection. Each lighting branch circuit must be protected
by an overcurrent device rated at 20
amperes or less, except as allowed
under paragraph (e) of this section.
(e) 25 or 30 ampere lighting branch circuits. Lighting branch circuits rated at
25 and 30 amperes supplying only fixed
nonswitched lighting fixtures for cargo
hold or deck lighting having only
lampholders of the mogul type, or
other lampholding devices required for
lamps of more than 300 watts, may be
supplied by a 30 ampere branch circuit
wired with at least No. 10 AWG (5.3
mm2) conductors if each fixture wire
used in wiring each lighting fixture is
No. 12 AWG (3.3 mm2) or larger.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996; 62 FR 23909, May 1, 1997; USCG–2003–
16630, 73 FR 65199, Oct. 31, 2008]

§ 111.75–15 Lighting requirements.
(a) Lights in passageways, public
spaces, and berthing compartments. The
supply to lights in each passageway,
public space, or berthing compartment
accommodating more than 25 persons
must be divided between two or more

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Coast Guard, DHS

§ 111.75–17

branch circuits, one of which may be
an emergency branch circuit.
(b) Lights in machinery spaces. Alternate groups of lights in an engineroom,
boilerroom, or auxiliary machinery
space must be arranged so that the
failure of one branch circuit does not
leave an area without light.
(c) Illumination of passenger and crew
spaces. (1) Each space used by passengers or crew must be fitted with
lighting that provides for a safe habitable and working environment under
normal conditions.
(2) Sufficient illumination must be
provided by the emergency lighting
source under emergency conditions to
effect damage control procedures and
to provide for safe egress from each
space.
(d) Berth lights. Each crew berth must
have a fixed berth light that is not
wired with a flexible cord. The berth
light must have minimum horizontal
projection so that the light may not be
covered with bedding.
(e) Exit lights. Each exit light required on passenger vessels under
§ 112.15–1 of this subchapter must have
the word ‘‘Exit’’ in red block letters at
least 2 inches (50 mm) high.
(f) Pilot ladders. There must be a
means for lighting each station from
which a pilot may be deployed.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996]

§ 111.75–16 Lighting of survival craft
and rescue boats.

wreier-aviles on DSK3TPTVN1PROD with CFR

(a) During preparation, launching,
and recovery, each survival craft and
rescue boat, its launching appliance,
and the area of water into which it is
to be launched or recovered must be
adequately illuminated by lighting
supplied from the emergency power
source.
(b) The arrangement of circuits must
be such that the lighting for adjacent
launching stations for survival craft or
rescue boats is supplied by different
branch circuits.
[CGD 94–108, 61 FR 28282, June 4, 1996]

§ 111.75–17

Navigation lights.

Each navigation light system must
meet the following:

(a) Feeders. On vessels required to
have a final emergency power source
by § 112.05–5(a) of this chapter, each
navigation light panel must be supplied
by a feeder from the emergency switchboard (see § 112.43–13). The feeder must
be protected by overcurrent devices
rated or set at a value of at least twice
that of the navigation light panel main
fuses.
(b) Navigation light indicator panel.
Each self-propelled vessel must have a
navigation light indicator panel in the
navigating bridge to control side,
masthead, and stern lights. The panel
must visually and audibly signal the
failure of each of these navigation
lights. Each light source must be connected to a separate fused branch circuit. The panel must have a fused feeder disconnect switch, and the fuses
must have at least twice the rating of
the largest branch circuit fuse and
must be greater than the maximum
panel load.
(c) Dual light sources. Each self-propelled vessel must have duplicate light
sources for the side, masthead, and
stern lights.
(d) Navigation lights. Each navigation
light must meet the following:
(1) Meet the technical details of the
applicable navigation rules.
(2) Be certified by an independent
laboratory to the requirements of UL
1104 (incorporated by reference; see 46
CFR 110.10–1) or an equivalent standard
under 46 CFR 110.20–1. Portable battery
powered lights need meet only the requirements of the standard applicable
to those lights.
(3) Be labeled with a label stating the
following:
(i) ‘‘MEETS lllll.’’ (Insert the
identification name or number of the
standard under paragraph (d)(2) of this
section to which the light was typetested.)
(ii) ‘‘TESTED BY lllll.’’ (Insert
the name or registered certification
mark of the independent laboratory
that tested the fixture to the standard
under paragraph (d)(2) of this section).
(iii) Manufacturer’s name.
(iv) Model number.
(v) Visibility of the light in nautical
miles.
(vi) Date on which the fixture was
type-tested.

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§ 111.75–18

46 CFR Ch. I (10–1–11 Edition)

(vii) Identification of bulb used in the
compliance test.
(4) If it is a flashing light, have its intensity determined by the formula:

be at least 50 percent of the axial luminous intensity.

Ie=G/(0.2+t2¥t1)

§ 111.75–20

Where

(a) The construction of each lighting
fixture for a non-hazardous location
must meet UL 1598A or IEC 92–306 (both
incorporated by reference; see 46 CFR
110.10–1).
(b) Each fixture globe, lens, or diffuser must have a high strength guard
or be made of high strength material,
except in an accommodation space,
navigating bridge, gyro room, radio
room, galley, or similar space where it
is not subject to damage.
(c) No fixture may be used as a connection box for a circuit other than the
branch circuit supplying the fixture.
(d) Lighting fixtures must be installed as follows:
(1) Each fixture in the weather or in
a location exposed to splashing water
must be watertight. Each fixture in a
damp or wet location must at least be
dripproof.
(2) Each fixture and lampholder must
be fixed. A fixture must not be supported by the screw shell of a
lampholder.
(3) Each pendent-type fixture must be
suspended by and supplied through a
threaded, rigid conduit stem.
(4)
Each
tablelamp,
desklamp,
floorlamp, and similar equipment must
be secured in place so that it cannot be
displaced by the roll or pitch of the
vessel.
(e) Nonemergency and decorative interior-lighting fixtures in environmentally protected, nonhazardous locations need meet only the applicable UL
type-fixture standards in UL 1598 (incorporated by reference; see 46 CFR
110.10–1) and UL 1598A marine supplement or the standards in IEC 92–306.
These fixtures must have vibration
clamps on fluorescent tubes longer
than 102 cm (40 inches), secure mounting of glassware, and rigid mounting.

Ie=Luminous Intensity.
G=Integral of Idt evaluated between the limits of t1 and t2.
t1=Time in seconds of the beginning of the
flash.
t2=Time in seconds of the end of the flash.
I=Instantaneous intensity during the flash.
NOTE: The limits, t1 and t2, are to be chosen so as to maximize Ie.

(e) Installation of navigation lights.
Each navigation light must:
(1) Be installed so that its location
and its angle of visibility meet the applicable navigation rules;
(2) Except as permitted by the applicable navigation rules, be arranged so
that light from a navigation light is
not obstructed by any part of; the vessel’s structure or rigging;
(3) Be wired by a short length of
heavy-duty, flexible cable to a watertight receptacle outlet next to the
light or, for permanently mounted fixtures, by direct run of fixed cable; and
(4) If it is a double-lens, two-lamp
type, have each lamp connected to its
branch circuit conductors either by an
individual flexible cable and watertight
receptacle plug or, for permanently
mounted fixtures, by an individual direct run of fixed cable.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28282, June 4,
1996; 61 FR 33045, June 26, 1996; 62 FR 23909,
May 1, 1997; USCG–2003–16630, 73 FR 65199,
Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.75–18

Signaling lights.

Each self-propelled vessel over 150
gross tons when engaged on an international voyage must have on board an
efficient daylight signaling lamp that
may not be solely dependent upon the
vessel’s main source of electrical power
and that meets the following:
(a) The axial luminous intensity of
the beam must be at least 60,000 candelas.
(b) The luminous intensity of the
beam in every direction within an
angle of 0.7 degrees from the axial must

[CGD 94–108, 61 FR 28282, June 4, 1996]

Lighting fixtures.

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996; 61 FR 36787, July 12, 1996; 62 FR 23909,
May 1, 1997; USCG–2003–16630, 73 FR 65199,
Oct. 31, 2008]

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Coast Guard, DHS

§ 111.79–15

Subpart 111.77—Appliances and
Appliance Circuits
§ 111.77–1

§ 111.79–3

Overcurrent protection.

If a circuit supplies only one appliance or device, the rating or setting of
the branch circuit overcurrent device
must not be more than 150 percent of
the rating of the appliance or device, or
15 amperes, whichever is greater.
§ 111.77–3

Appliances.

All electrical appliances, including,
but not limited to, cooking equipment,
dishwashers, refrigerators, and refrigerated drinking water coolers, must
meet UL safety and construction
standards or equivalent standards
under § 110.20-1 of this chapter. Also,
this equipment must be suitably installed for the location and service intended.
[CGD 94–108, 61 FR 28283, June 4, 1996; 61 FR
33045, June 26, 1996]

Subpart 111.79—Receptacles

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.79–1

Grounding pole.

Each receptacle outlet that operates
at 100 volts or more must have a
grounding pole.

Receptacle outlets; general.

(a) There must be a sufficient number
of receptacle outlets in the crew accommodations for an adequate level of
habitability.
(b) There must be a sufficient number
of receptacle outlets throughout the
machinery space so that any location
can be reached by a portable power
cord having a length not greater than
24 meters (75 feet).
(c) Each receptacle outlet must be
compatible with the voltage and current of the circuit in which it is installed.
(d) Each receptacle outlet must be
suitable for the environment in which
it is installed and constructed to the
appropriate NEMA or IEC protection
standard as referenced in § 111.01–9.
Special attention must be given to outlets in hazardous locations.
(e) A receptacle outlet must not have
any exposed live parts with the plug
opening uncovered.
[CGD 94–108, 61 FR 28283, June 4, 1996]

§ 111.79–9 Transmitting
tween receptacles.

power

(a) If it is necessary to transmit current in one direction between two receptacle outlets by a flexible cable
with a plug on each end, such as a battery charging lead between a receptacle outlet on a ship and a receptacle
outlet in a lifeboat, the plug that may
be energized when not in the receptacle
outlet must be female.
(b) If a receptacle outlet may be used
as a source of power and as a receiver
of power, such as the receptacles on
barges that may have to supply power
to adjoining barges in some makeup
and receive power from the towboat or
adjoining barge in other makeups, the
receptacles must be male and reverse
service. Plugs of flexible cable must be
female and must be at both ends of the
flexible lead. The female plug must
meet § 111.79–1(d) or § 111.79–3.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2011–0618, 76 FR 60754,
Sept. 30, 2011]

§ 111.79–11

Lifeboat receptacles.

Each receptacle outlet on a lifeboat
for connection to a vessel’s electrical
system must allow the plug to pull free
when the lifeboat is lowered.
§ 111.79–13 Different
power types.

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If receptacle outlets on a vessel are
supplied by different voltages (e.g., 110
volts and 220 volts) or by different
types of power (e.g., AC and DC), each
receptacle outlet must preclude the
plugging of a portable device into a receptacle outlet of an incompatible
voltage or type of power.
[CGD 94–108, 61 FR 28283, June 4, 1996]

§ 111.79–15 Receptacles
erated containers.

for

refrig-

Receptacles for refrigerated containers must meet one of the following:
(a) Each receptacle for refrigerated
containers
must
have
a
switch

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§ 111.81–1

46 CFR Ch. I (10–1–11 Edition)

interlocked in such a way that the receptacle’s contacts are deenergized before the making or breaking of the connection between the plug and receptacle contacts.
(b) Each group of receptacles for refrigerated containers must have:
(1) A switch near the receptacles that
disconnects all power to those receptacles; and
(2) A sign stating that the switch
should be opened before cables are disconnected from the receptacles or refrigerated containers.
(c) Each receptacle for refrigerated
containers must be designed for circuit
breaking service.

Subpart 111.81—Outlet Boxes and
Junction Boxes

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.81–1 Outlet boxes and junction
boxes; general.
(a) The requirements of this subpart
apply to each outlet box used with a
lighting fixture, wiring device, or similar item, including each separately installed connection and junction box.
(b) An outlet box must be at each
outlet, switch, receptacle, or junction
point.
(c) Each outlet or junction box must
have a cover unless a fixture canopy,
switch cover, receptacle cover, or other
cover is used.
(d) As appropriate, each outlet-box or
junction-box installation must meet
the following standards, all of which
are incorporated by reference (see 46
CFR 110.10–1): Article 314 of NFPA NEC
2002; UL 50; UL 514A, UL 514B, and UL
514C; IEC 60092–101; IEC 92–201; IEC 92–
306; IEC 60092–352; IEC 92–401; and IEC
60092–502.
(e) Each outlet or junction box must
be securely attached to its mounting
and be affixed so as to maintain its designated degree of protection.
(f) Each outlet and junction box must
be suitable for the environment in
which it is installed and be constructed
to the appropriate NEMA or IEC standard.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996; USCG–2003–16630, 73 FR 65199, Oct. 31,
2008]

§ 111.81–3

Cables entering boxes.

Each cable entering a box or fitting
must be protected from abrasion and
must meet the following:
(a) Each opening through which a
conductor enters must be closed.
(b) Cable armor must be secured to
the box or fitting.
(c) Each cable entrance in a damp or
wet location must be made watertight
by a terminal or stuffing tube.

Subpart 111.83—Shore
Connection Boxes
§ 111.83–1

General.

Each shore connection box must be of
a size that accommodates the connections of the flexible and fixed cables.
§ 111.83–5 Bottom entrance and protected enclosures.
Each shore connection box must have
a bottom entrance for the shore connection cable. The box must provide
protection to the shore connection
when the connection is in use.

Subpart 111.85—Electric Oil
Immersion Heaters
§ 111.85–1
ers.

Electric oil immersion heat-

Each oil immersion heater must have
the following:
(a) An operating thermostat.
(b) Heating elements that have no
electrical contact with the oil.
(c) A high temperature limiting device that:
(1) Opens all conductors to the heater;
(2) Is manually reset; and
(3) Actuates at a temperature below
the flashpoint of the oil.
(d) Either—
(1) A low-fluid-level device that opens
all conductors to the heater if the operating level drops below the manufacturer’s recommended minimum safe
level; or
(2) A flow device that opens all conductors to the heater if there is inadequate flow.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996]

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Coast Guard, DHS

§ 111.95–7
dumbwaiter must meet ASME A17.1
(incorporated by reference; see 46 CFR
110.10–1).

Subpart 111.87—Electric Air
Heating Equipment
§ 111.87–1

Applicability.

[USCG–2003–16630, 73 FR 65199, Oct. 31, 2008]

This subpart applies to electrically
energized units or panels for heating a
room or compartment. This subpart
does not apply to electrically energized
units for heating the air in an enclosed
apparatus, such as a motor or controller.
§ 111.87–3

General requirements.

(a) Each electric heater must meet
applicable UL 484 or UL 1042 construction standards (both incorporated by
reference; see 46 CFR 110.10–1) or equivalent standards under § 110.20–1 of this
chapter
(b) Each heater element must be an
enclosed type. The heater element case
or jacket must be of a corrosion-resistant material.
(c) Each heater must have a thermal
cutout of the manually-reset type that
prevents overheating and must have a
thermal regulating switch.
(d) Each heater for bulkhead mounting must have its top slanted or otherwise designed to prevent hanging anything on the heater. If a heater is portable, it must have a clip or bracket to
hold the heater in a fixed position.
(e) The external temperature of a
heater enclosing case must not be over
125 degrees C, except that the external
temperature of the enclosing case of a
flush-mounted heater must not be over
100 degrees C. If a heater is mounted on
or next to a deck or bulkhead, the
heater must not cause the temperature
of the nearest deck or bulkhead to be
over 55 degrees C. For test purposes, an
ambient temperature of 25 degrees C
must be used.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996; 61 FR 33045, June 26, 1996; 61 FR 36608,
July 11, 1996; USCG–2003–16630, 73 FR 65199,
Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 111.91—Elevators and
Dumbwaiters
§ 111.91–1 Power, control, and interlock circuits.
Each electric power, control, and
interlock circuit of an elevator or

Subpart 111.95—Electric PowerOperated Boat Winches
§ 111.95–1 Applicability.
(a) The electric installation of each
electric power-operated boat winch
must meet the requirements in this
subpart, except that limit switches
must be adapted to the installation if
there are no gravity davits.
(b) The provisions of this subpart
supplement the requirements for boat
winches in other parts of this chapter
under which vessels are certificated
and in subchapter Q, Equipment approvals.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996]

§ 111.95–3 General requirements.
(a) Each electrical component (e.g.,
enclosure, motor controller, or motor)
must be constructed to the appropriate
NEMA or IEC degree of protection requirement for the service and environment in which it is installed.
(b) Each main line emergency disconnect switch, if accessible to an unauthorized person, must have a means
to lock the switch in the open-circuit
position with a padlock or its equivalent. The switch must not lock in the
closed-circuit position.
[CGD 94–108, 61 FR 28283, June 4, 1996]

§ 111.95–7 Wiring of boat winch components.
(a) If the motor controller of a boat
winch power unit is next to the winch,
the main line emergency switch must
disconnect all parts of the boat winch
power unit, including the motor controller and limit switches, from all
sources of potential. Other power circuit switches must be connected in series with the main line emergency
switch and must be ahead of the motor
controller. The main line emergency
switch must be the motor and controller disconnect required by Subpart
111.70 and must have a horsepower rating of at least that of the winch motor.

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§ 111.97–1

46 CFR Ch. I (10–1–11 Edition)

(b) If the motor controller of a boat
winch power unit is remote from the
winch, there must be a switch at the
controller that can disconnect the entire winch electric installation from all
sources of potential. The switch must
be in series with and on the supply side
of the main line emergency switch.
(c) Each davit arm limit switch,
whether connected in the power circuit
or in the control circuit, must disconnect all ungrounded conductors of
the circuit controlled.
(d) If one motor is used with two
winches, there must be a main line
emergency switch, a clutch interlock
switch, and a master switch for each
winch, except that a single main line
emergency switch located as required
by paragraph (e) of this section may be
used for both winches. The main line
emergency switches must be connected, in series, ahead of the motor
controller. The master switches must
be connected in parallel and each, in
series, with the corresponding clutch
interlock switch for that winch. Each
clutch interlock switch must open the
circuit to its master switch, except
when the power unit is clutched to the
associated winch. There must be a
means to prevent the power unit from
being clutched to both winches simultaneously.
(e) The main line emergency disconnect switch must be adjacent to the
master switch, within reach of the
winch operator, accessible to the person in charge of the boat stowage, and
for gravity davit installations, in a position from which the movement of
boat davit arms can be observed as
they approach the final stowed position.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996]

Subpart 111.97—Electric PowerOperated Watertight Door Systems

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.97–1

Applicability.

This subpart applies to electric
power-operated watertight door systems required under Subpart H of Part
170 of this chapter.
[CGD 79–023, 48 FR 51008, Nov. 4, 1983]

§ 111.97–3

General requirements.

Each watertight door operating system must meet Subpart H, § 170.270 of
this chapter.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2000–7790, 65 FR 58462,
Sept. 29, 2000]

§ 111.97–5 Electric
power supply.

and

hydraulic

(a) Each electric motor-driven door
operating system must have the same
source of power as the emergency
lighting and power system.
(b) The temporary emergency power
source and the final emergency power
source must each be capable of operating all doors simultaneously or sequentially as allowed by § 170.270(c) of
this chapter.
(c) The power supply for each hydraulically operated watertight door system that uses a hydraulic system common to more than one watertight door
must be an accumulator tank with
enough capacity to open all doors once
and to close all doors two times and be
supplied by one or more motor-driven
hydraulic pumps that can operate from
the final source of the emergency
lighting and power system.
(d)
The
motor-driven
hydraulic
pumps must automatically maintain
the accumulator tank pressure within
the design limits, be above the uppermost continuous deck, and be controlled from above the uppermost continuous deck.
(e) The accumulator tank capacity
required in paragraph (c) of this section must be available when the accumulator tank pressure is at the automatic pump ‘‘cut-in’’ pressure.
(f) The source of power for each hydraulically operated watertight door
system using an independent hydraulic
system for each door operator must
meet paragraphs (a) and (b) of this section.
(g) The power supply for other types
of watertight door operators must be
accepted by the Commandant.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28283, June 4,
1996; USCG–2000–7790, 65 FR 58462, Sept. 29,
2000]

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Coast Guard, DHS

§ 111.103–1

§ 111.97–7 Distribution.
(a) Each distribution panelboard for a
watertight door system must be above
the uppermost continuous deck and
must have means for locking.
(b) Each feeder supplying a watertight door operating system must be
above the uppermost continuous deck.
(c) Each watertight door operating
system must have a separate branch
circuit.
§ 111.97–9 Overcurrent protection.
Overcurrent devices must be arranged to isolate a fault with as little
disruption of the system as possible.
The relationship between the load and
the rating or setting of overcurrent devices must meet the following:
(a) The rating or setting of each feeder overcurrent device must be not less
than 200 percent of its maximum load.
(b) The rating or setting of a branch
circuit overcurrent device must be not
more than 25 percent of that of the
feeder overcurrent device.

Subpart 111.99—Fire Door Holding
and Release Systems
§ 111.99–1 Applicability.
This subpart applies to fire door
holding and release systems, if fitted.

wreier-aviles on DSK3TPTVN1PROD with CFR

[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28284, June 4,
1996]

§ 111.99–3 Definitions.
As used in this subpart—
Central control panel means a manually-operated device on the navigating
bridge or in the fire control room for
releasing one or more fire doors.
Fire door means a door that is in a
fire boundary, such as a stairway enclosure or main vertical zone bulkhead,
that is not usually kept closed.
Fire door holding magnet means an
electromagnet for holding a fire door
open.
Local control panel means a manuallyoperated device next to a fire door for
releasing the door so that the fire door
self-closing mechanism may close the
door.
[CGD 94–108, 61 FR 28284, June 4, 1996; 61 FR
33045, June 26, 1996; as amended by USCG–
2004–18884, 69 FR 58348, Sept. 30, 2004]

§ 111.99–5 General.
Fire door release systems, if installed, must meet regulation II–2/30.4.3
of IMO SOLAS 74 (incorporated by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65199, Oct. 31, 2008]

Subpart 111.101—Submersible
Motor-Driven Bilge Pumps
§ 111.101–1 Applicability.
This subpart applies to each submersible motor-driven bilge pump required
on certain vessels under 46 CFR 56.50–
55.
[USCG–2003–16630, 73 FR 65199, Oct. 31, 2008]

§ 111.101–3 General requirements.
(a) Each electric motor driving a submersible bilge pump must be in an open
end air bell of rugged construction and
be of a size that does not allow water
to enter the motor if the compartment
that the motor is in is flooded to the
uppermost continuous deck.
(b) The motor, if of the open type,
must be protected from splashing
water from the bottom.
(c) The cable to each motor must
enter through the open bottom of the
air bell.
(d) Each motor must be able to operate continuously at rated load under
any condition, dry or with water in the
air bell at any level up to the maximum allowed under paragraph (a) of
this section.
(e) Each motor controller must be
above the uppermost continuous deck.
There must be a master switch at the
controller and a master switch at the
motor. The master switch at the motor
must be disconnected from the circuit
when the motor is started or stopped
from the master switch at the controller.
(f) Each motor must be energized
from the final emergency power source.

Subpart 111.103—Remote
Stopping Systems
§ 111.103–1 Power ventilation systems
except machinery space ventilation
systems.
Each power ventilation system must
have:

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46 CFR Ch. I (10–1–11 Edition)

(a) A control to stop the ventilation
that is:
(1) Outside the space ventilated; and
(2) Grouped with the controls for
every power ventilation system to
which this section is applicable; and
(b) In addition to the control required by paragraph (a), a stop control
that is:
(1) As far as practicable from the control required by paragraph (a) and
grouped with the controls for every
power ventilation system to which this
section is applicable; or
(2) The circuit breakers for ventilation grouped on the main switchboard
and marked, ‘‘In Case of Fire Trip to
Stop Ventilation.’’
NOTE: The requirements of this section do
not apply to closed ventilation systems for
motors or generators, diffuser fans for refrigerated spaces, room circulating fans, or exhaust fans for private toilets of an electrical
rating comparable to that of a room circulating fan.

§ 111.103–3
tion.

Machinery

space

ventila-

(a) Each machinery space ventilation
system must have two controls to stop
the ventilation, one of which may be
the supply circuit breaker.
(b) The controls required in paragraph (a) of this section must be
grouped so that they are operable from
two positions, one of which must be
outside the machinery space.
§ 111.103–7

Ventilation stop stations.

Each ventilation stop station must:
(a) Be protected by an enclosure with
a glass-paneled door on the front;
(b) Be marked, ‘‘In Case of Fire
Break Glass and Operate Switch to
Stop Ventilation;’’
(c) Have the ‘‘stop’’ position of the
switch clearly identified;
(d) Have a nameplate that identifies
the system controlled; and
(e) Be arranged so that damage to the
switch or cable automatically stops the
equipment controlled.

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.103–9

Machinery stop stations.

(a) Each forced draft fan, induced
draft fan, blower of an inert gas system, fuel oil transfer pump, fuel oil
unit, fuel oil service pump, and any
other fuel oil pumps must have a stop

control that is outside of the space
containing the pump or fan.
(b) Each stop control must meet
§ 111.103–7.

Subpart 111.105—Hazardous
Locations
§ 111.105–1 Applicability; definition.
This subpart applies to installations
in hazardous locations as defined in
NFPA NEC 2002 and in IEC 60079–0
(both incorporated by reference; see 46
CFR 110.10–1). As used in this subpart,
‘‘IEC 60079 series’’ means IEC 60079–0,
IEC 60079–1, IEC 60079–2, IEC 60079–5,
IEC 79–6, IEC 60079–7, IEC 60079–11, IEC
60079–15, and IEC 79–18 (all incorporated
by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 65199, Oct. 31, 2008]

§ 111.105–3 General requirements.
All electrical installations in hazardous locations must comply with the
general requirements of section 33 of
IEEE 45–1998 (incorporated by reference; see 46 CFR 110.10–1), and with
either Articles 500 through 505 of NFPA
NEC 2002 (incorporated by reference;
see 46 CFR 110.10–1) or with the IEC
60079 series (as defined in 46 CFR
111.105–1 and incorporated by reference;
see 46 CFR 110.10–1). When installations
are made in accordance with NFPA
NEC 2002 articles, and when installed
fittings are approved for the specific
hazardous location and the cable type,
marine shipboard cable that complies
with 46 CFR subpart 111.60 may be used
instead of rigid metal conduit.
[USCG–2003–16630, 73 FR 65199, Oct. 31, 2008]

§ 111.105–5 System integrity.
In order to maintain system integrity, each individual electrical installation in a hazardous location must
comply specifically with Articles 500–
505 of NFPA NEC 2002 (incorporated by
reference; see 46 CFR 110.10–1), as modified by 46 CFR 111.105–3, or with the
IEC 60079 series (as defined in 46 CFR
111.105–1 and incorporated by reference;
see 46 CFR 110.10–1), but not in combination in a manner that will compromise system integrity or safety.
Hazardous location equipment must be
approved as suitable for use in the specific hazardous atmosphere in which it

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Coast Guard, DHS

§ 111.105–17

is installed. The use of nonapproved
equipment is prohibited.
[USCG–2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–7

Approved equipment.

When this subpart or NFPA NEC 2002
(incorporated by reference; see 46 CFR
110.10–1) states that an item of electrical equipment must be approved, or
when IEC 60079–0 (incorporated by reference; see 46 CFR 110.10–1) states that
an item of electrical equipment must
be tested or approved in order to comply with the IEC 60079 series (as defined
in § 111.105–1 and incorporated by reference; see 46 CFR 110.10–1), that item
must be—
(a) Listed or certified by an independent laboratory as approved for use
in the hazardous locations in which it
is installed; or
(b) Purged and pressurized equipment
that meets NFPA 496 (incorporated by
reference; see 46 CFR 110.10–1) or IEC
60079–2.
[CGD 94–108, 61 FR 28284, June 4, 1996, as
amended by USCG–2003–16630, 73 FR 65200,
Oct. 31, 2008]

§ 111.105–9 Explosion-proof and flameproof equipment.
Each item of electrical equipment required by this subpart to be explosionproof under the classification system of
NFPA NEC 2002 (incorporated by reference; see 46 CFR 110.10–1) must be approved as meeting UL 1203 (incorporated by reference; see 46 CFR 110.10–
1). Each item of electrical equipment
required by this subpart to be flameproof must be approved as meeting IEC
60079–1 (incorporated by reference; see
46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65200, Oct. 31, 2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–11

Intrinsically safe systems.

(a) Each system required by this subpart to be intrinsically safe must use
approved components meeting UL 913
or IEC 60079–11 (both incorporated by
reference; see 46 CFR 110.10–1).
(b) Each electric cable of an intrinsically safe system must—
(1) Be 50 mm (2 inches) or more from
cable of non-intrinsically safe circuits,
partitioned by a grounded metal barrier from other non-intrinsically safe

electric cables, or a shielded or metallic armored cable; and
(2) Not contain conductors for nonintrinsically safe systems.
(c) As part of plan approval, the manufacturer must provide appropriate installation instructions and restrictions
on approved system components. Typical instructions and restrictions include information addressing—
(1) Voltage limitations;
(2) Allowable cable parameters;
(3) Maximum length of cable permitted;
(4) Ability of system to accept passive devices;
(5) Acceptability of interconnections
with conductors or other equipment for
other intrinsically safe circuits; and
(6) Information regarding any instructions or restrictions which were a
condition of approval of the system or
its components.
(d) Each intrinsically safe system
must meet ISA RP 12.6 (incorporated
by reference, see 46 CFR 110.10–1), except Appendix A.1.
[CGD 94–108, 61 FR 28284, June 4, 1996, as
amended at 62 FR 23909, May 1, 1997; USCG–
2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–15 Additional
methods
of
protection.
Each item of electrical equipment
that is—
(a) A powder-filled apparatus must
meet IEC 60079–5 (incorporated by reference; see 46 CFR 110.10–1);
(b) An oil-immersed apparatus must
meet either IEC 79–6 (incorporated by
reference; see 46 CFR 110.10–1) or Article 500.7(I) of NFPA NEC 2002 (incorporated by reference; see 46 CFR 110.10–
1);
(c) Type of protection ‘‘e’’ must meet
IEC 60079–7 (incorporated by reference;
see 46 CFR 110.10–1);
(d) Type of protection ‘‘n’’ must meet
IEC 60079–15 (incorporated by reference;
see 46 CFR 110.10–1); and
(e) Type of protection ‘‘m’’ must
meet IEC 79–18 (incorporated by reference; see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–17 Wiring methods for hazardous locations.
(a) Through runs of marine shipboard
cable meeting subpart 111.60 of this

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§ 111.105–19

46 CFR Ch. I (10–1–11 Edition)

part are required for all hazardous locations. Armored cable may be used to
enhance ground detection capabilities.
Additionally, Type MC cable may be
used subject to the restrictions in
§ 111.60–23.
(b) Where conduit is installed, the applicable requirements of either NFPA
NEC 2002 (incorporated by reference;
see 46 CFR 110.10–1) or the IEC 60079 series (as defined in § 111.105–1 and incorporated by reference; see 46 CFR 110.10–
1) must be followed.
(c)
Each
cable
entrance
into
explosionproof or flameproof equipment must be made with approved seal
fittings, termination fittings, or glands
that meet the requirements of § 111.105–
9.
(d) Each cable entrance into Class II
and Class III (Zone 10, 11, Z, or Y)
equipment must be made with dusttight cable entrance seals approved for
the installation.
[CGD 94–108, 61 FR 28284, June 4, 1996, as
amended at 62 FR 23909, May 1, 1997; USCG–
2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–19

Switches.

A switch that is explosionproof or
flameproof, or that controls any
explosionproof or flameproof equipment, under § 111.105–19 must have a
pole for each ungrounded conductor.
[CGD 94–108, 61 FR 28284, June 4, 1996]

§ 111.105–21

Ventilation.

A ventilation duct which ventilates a
hazardous location has the classification of that location. Each fan for ventilation of a hazardous location must
be nonsparking.
[CGD 94–108, 61 FR 28285, June 4, 1996]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–27

Belt drives.

Each belt drive in a hazardous location must have:
(a) A conductive belt; and
(b) Pulleys, shafts, and driving equipment grounded to meet NFPA 77 (incorporated by reference, see 46 CFR
110.10–1).
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by USCG–2003–16630, 73 FR 65200,
Oct. 31, 2008]

§ 111.105–29 Combustible liquid cargo
carriers.
(a) Each vessel that carries combustible liquid cargo with a closed-cup
flashpoint of 60 degrees C (140 degrees
F) or higher must have:
(1) Only intrinsically safe electric
systems in cargo tanks; and
(2) No storage battery in any cargo
handling room.
(b) If a submerged cargo pump motor
is in a cargo tank, it must meet the requirements of § 111.105–31(d).
(c) Where the cargo is heated to within 15°C of its flashpoint, the cargo
pumproom must meet the requirements of § 111.105–31(f) and the weather
locations must meet § 111.105–31(l).
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28285, June 4,
1996; 61 FR 36787, July 12, 1996; 61 FR 39695,
July 30, 1996]

§ 111.105–31 Flammable or combustible
cargo with a flashpoint below 60 ≥C
(140 ≥F), carriers of liquid-sulphur
or inorganic acid.
(a) Applicability. Each vessel that carries combustible or flammable cargo
with a closed-cup flashpoint lower than
60 degrees C (140 degrees F) or liquid
sulphur cargo, or inorganic acid cargo
must meet the requirements of this
section, except—
(1) A vessel carrying bulk liquefied
flammable gases as a cargo, cargo residue, or vapor which must meet the requirements of § 111.105–32; and
(2) A vessel carrying carbon disulfide
must have only intrinsically safe electric equipment in the locations listed
in paragraphs (e) through (l) of this
section.
(b) Cable location. Electric cable must
be as close as practicable to the centerline and must be away from cargo tank
openings.
(c) Lighting circuits. An enclosed hazardous space that has explosionproof
lighting fixtures must:
(1) Have at least two lighting branch
circuits;
(2) Be arranged so that there is light
for relamping any deenergized lighting
circuit; and
(3) Not have the switch within the
space for those spaces containing
explosionproof lighting fixtures under

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wreier-aviles on DSK3TPTVN1PROD with CFR

Coast Guard, DHS

§ 111.105–31

paragraphs (g), (i) and (j) of this section.
(d) Submerged cargo pump motors. If a
submerged cargo pump motor is in a
cargo tank:
(1) Low liquid level, motor current,
or pump discharge pressure must automatically shutdown power to the
motor if the pump loses suction;
(2) An audible and visual alarm must
be actuated by the shutdown of the
motor; and
(3) There must be a lockable circuit
breaker or lockable switch that disconnects power to the motor.
(e) Cargo Tanks. A cargo tank is a
Class I, Division 1 (IEC Zone 0) location
that has additional electrical equipment restrictions outlined in section 33
of IEEE 45–1998 and IEC 60092–502 (both
incorporated by reference; see 46 CFR
110.10–1). Cargo tanks must not contain
any electrical equipment except the
following:
(1) Intrinsically safe equipment; and
(2) Submerged cargo pump motors
and their associated cable.
(f) Cargo handling rooms. A cargo handling room must not have any electric
cable or other electric equipment, except:
(1) Intrinsically safe equipment;
(2) Explosionproof lighting fixtures;
(3) Cables supplying intrinsically safe
equipment in the cargo handling room;
and
(4) Marine shipboard cables that supply explosionproof lighting fixtures
that are in the cargo handling room.
(g) Lighting of cargo handling rooms.
Lighting for a cargo handling room except a cargo handling room under paragraph (h) of this section, must be lighted through fixed glass lenses in the
bulkhead or overhead. Each fixed glass
lens must be wire-inserted glass that is
at least .025 inches (6.35 mm) thick and
arranged to maintain the watertight
and gastight integrity of the structure.
The fixed glass lens may form a part of
a listing fixture if the following are
met:
(1) There is no access to the interior
of the fixture from the cargo handling
room.
(2) The fixture is vented to the
engineroom or a similar nonhazardous
area.

(3) The fixture is wired from outside
the cargo handling room.
(4) The temperature on the cargo
handling room surface of the glass lens,
based on an ambient temperature of 40
degrees C, is not higher than 180 degrees C.
(h) A cargo handling room which precludes the lighting arrangement of
paragraph (g) of this section, or where
the lighting arrangement of paragraph
(g) of the section does not give the required light, must have explosionproof
lighting fixtures.
(i) Enclosed spaces. An enclosed space
that is immediately above, below, or
next to a cargo tank must not contain
any electric equipment except equipment allowed for cargo handling rooms
in paragraphs (f) and (g), and:
(1) Through runs of marine shipboard
cable; and
(2) Watertight enclosures with bolted
and gasketed covers containing only:
(i) Depth sounding devices;
(ii) Log devices; and
(iii) Impressed-current cathodic protection system electrodes.
(j) Cargo hose stowage space. A cargo
hose stowage space must not have any
electrical
equipment
except
explosionproof lighting fixtures and
through runs of marine shipboard
cable.
(k) Cargo piping in a space. A space
that has cargo piping must not have
any
electrical
equipment
except
explosionproof lighting fixtures and
through runs of marine shipboard
cable.
(l) Weather locations. The following
locations in the weather are Class I,
Division 1 (Zone 1) locations (except
the open deck area on an inorganic
acid carrier which is considered a nonhazardous location) and may have only
approved
intrinsically
safe,
explosionproof, or purged and pressurized electrical equipment, and through
runs of marine shipboard cable if the
location is—
(1) Within 10 feet (3 m) of:
(i) A cargo tank vent outlet;
(ii) A cargo tank ullage opening;
(iii) A cargo pipe flange;
(iv) A cargo valve;
(v) A cargo handling room entrance;
or

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§ 111.105–32

46 CFR Ch. I (10–1–11 Edition)

(vi) A cargo handling room ventilation opening; or
(2) On a tankship and on the open
deck over the cargo area and 10 feet (3
m) forward and aft of the cargo area on
the open deck and up to 8 feet (2.4 m)
above the deck.
(3) Within 5 meters (16 ft) of cargo
pressure/vacuum valves with an unlimited height; or
(4) Within 10 meters (33 ft) of vent
outlets for free flow of vapor mixtures
and high velocity vent outlets for the
passage of large amounts of vapor, air
or inert gas mixtures during cargo
loading and ballasting or during discharging.
(m) Other spaces. Except for those
spaces listed in paragraphs (e) through
(k), a space that has a direct opening
to any space listed in paragraphs (e)
through (l) must have only the electric
installations that are allowed for the
space to which it opens.
(n) Duct keel ventilation or lighting. (1)
The lighting and ventilation system for
each pipe tunnel must meet ABS Steel
Vessel Rules (incorporated by reference; see 46 CFR 110.10–1), section 5–
1–7/31.17.
(2) If a fixed gas detection system is
installed, it must meet the requirements of IMO SOLAS 74 (incorporated
by reference; see 46 CFR 110.10–1) and
Part 4, Chapter 3 of ABS Steel Vessel
Rules.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 82–096, 49 FR 4947, Feb. 9,
1984; CGD 94–108, 61 FR 28285, June 4, 1996; 61
FR 33045, June 26, 1996; 62 FR 23909, May 1,
1997; USCG–2003–16630, 73 FR 65200, Oct. 31,
2008]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–32 Bulk liquefied flammable
gas and ammonia carriers.
(a) Each vessel that carries bulk liquefied flammable gases or ammonia as
a cargo, cargo residue, or vapor must
meet the requirements of this section.
(b) As used in this section:
(1) The terms ‘‘gas-safe’’ and ‘‘gasdangerous’’ spaces are used as defined
in § 154.7 of this chapter.
(2) The term ‘‘gas-dangerous’’ does
not include the weather deck of an ammonia carrier.
(c) Each submerged cargo pump
motor design must receive concept approval by the Commandant (CG–521)

and its installation must receive plan
approval by the Commanding Officer,
Marine Safety Center.
(d) Electrical equipment must not be
installed in a gas-dangerous space or
zone, except:
(1) Intrinsically safe electrical equipment and wiring, and
(2) Other equipment as allowed in
this section.
(e) A submerged cargo pump motor, if
installed in a cargo tank, must meet
§ 111.105–31(d).
(f) Electrical equipment must not be
installed in a hold space that has a
tank that is not required to have a secondary barrier under § 154.459 of this
chapter, except:
(1) Through runs of marine shipboard
cable;
(2) Explosionproof lighting fixtures;
(3) Depth sounding devices in gastight enclosures;
(4) Log devices in gastight enclosures;
(5) Impressed current cathodic protection system electrodes in gastight
enclosures; and
(6) Armored or MI type cable for a
submerged cargo pump motor.
(g) Electrical equipment must not be
installed in a space that is separated
by a gastight steel boundary from a
hold space that has a tank that must
have a secondary barrier under the requirements of § 154.459 of this chapter,
except:
(1) Through runs of marine shipboard
cable;
(2) Explosionproof lighting fixtures;
(3) Depth sounding devices in gastight enclosures;
(4) Log devices in gastight enclosures;
(5) Impressed current cathodic protection system electrodes in gastight
enclosures;
(6) Explosionproof motors that operate cargo system valves or ballast system valves;
(7) Explosionproof bells for general
alarm systems; and
(8) Armored or MI type cable for a
submerged cargo pump motor.
(h) A cargo-handling room must not
have any installed electrical equipment, except explosionproof lighting
fixtures.

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Coast Guard, DHS

§ 111.105–33

(i) A space for cargo hose storage or
a space that has cargo piping must not
have any installed electrical equipment, except:
(1) Explosionproof lighting fixtures;
and
(2) Through runs of marine shipboard
cable.
(j) A gas dangerous zone on the open
deck must not have any installed electrical equipment, except:
(1) Explosionproof equipment that is
necessary for the operation of the vessel; and
(2) Through runs of marine shipboard
cable.
(k) A space, except those named in
paragraphs (f) through (i) of this section, that has a direct opening to gasdangerous spaces or zones must have
no electrical equipment except as allowed in the gas-dangerous space or
zone.
(l) Each gas-dangerous space that has
lighting fixtures must have at least
two branch circuits for lighting.
(m) Each switch and each overcurrent protective device for any lighting
circuit that is in a gas-dangerous space
must open all conductors of the circuit
simultaneously.
(n) Each switch and each overcurrent
protective device for lighting in a gasdangerous space must be in a gas-safe
space.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 77–069, 52 FR 31626, Aug. 21,
1987; CGD 94–108, 61 FR 28285, June 4, 1996; 62
FR 23909, May 1, 1997; USCG–2009–0702, 74 FR
49234, Sept. 25, 2009]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–33
units.

Mobile

offshore

drilling

(a) Applicability. This section applies
to each mobile offshore drilling unit.
(b) Definitions. As used in this section:
(1) ‘‘Enclosed spaces’’ are locations
delineated by floors, bulkheads, or
decks which may have doors or windows.
(2) ‘‘Semi-enclosed spaces’’ are locations where natural conditions of ventilation are notably different from
those on open deck due to the presence
of structures such as roofs, windbreaks,
and bulkheads which are so arranged
that dispersion of gas may not occur.

(c) The internal space of each pressure vessel, tank, and pipe for drilling
mud and for gas venting must have
only intrinsically safe electric equipment.
(d) The following are Class I, Division
1 locations:
(1) An enclosed space that contains
any part of the mud circulating system
that has an opening into the space and
is between the well and final degassing
discharge.
(2) An enclosed or semi-enclosed location that is below the drill floor and
contains a possible source of gas release such as the top of a drilling nipple.
(3) An enclosed space that is on the
drill floor and is not separated by a
solid, gas-tight floor from the spaces
specified in paragraph (d)(2) of this section.
(4) A space that would normally be
considered a Division 2 location under
paragraph (e) of this section but where
combustible or flammable gases might
accumulate. This could include pits,
ducts, and similar structures downstream of the final degassing discharge.
(5) A location in the weather or a
semi-enclosed location, except as provided in paragraph (d)(2) of this section, that is within 5 feet (1.5 m) of the
boundary of any:
(i) Equipment or opening specified in
paragraph (d)(1) of this section;
(ii) Ventilation outlet, access, or
other opening to a Class I, Division 1
space; or
(iii) Gas vent outlet.
(6) Except as provided in paragraph
(f) of this section, an enclosed space
that has an opening into a Class I, Division 1 location.
(e) The following are Class I, Division
2 locations:
(1) An enclosed space that has any
open portion of the mud circulating
system from the final degassing discharge to the mud suction connection
at the mud pit.
(2) A location in the weather that is:
(i) Within the boundaries of the drilling derrick up to a height of 10 feet
(3m) above the drill floor;
(ii) Below the drill floor and within a
radius of 10 feet (3m) of a possible
source of release, such as the top of a
drilling nipple; or

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wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–35

46 CFR Ch. I (10–1–11 Edition)

(iii) Within 5 feet (1.5m) of the boundaries of any ventilation outlet, access,
or other opening to a Class I, Division
2 space.
(3) A location that is:
(i) Within 5 feet (1.5m) of a semi-enclosed Class I, Division 1 location indicated in paragraph (d)(2) of this section; or
(ii) Within 5 feet (1.5m) of a Class I,
Division 1 space indicated in paragraph
(d)(5).
(4) A semi-enclosed area that is below
and contiguous with the drill floor to
the boundaries of the derrick or to the
extent of any enclosure which is liable
to trap gases.
(5) A semi-enclosed derrick to the extent of its enclosure above the drill
floor, or to a height of 10 feet (3m)
above the drill floor, whichever is
greater.
(6) Except as provided in paragraph
(f) of this section, an enclosed space
that has an opening into a Class I, Division 2 location.
(f) An enclosed space that has direct
access to a Division 1 or Division 2 location is the same division as that location, except:
(1) An enclosed space that has direct
access to a Division 1 location is not a
hazardous location if:
(i) The access has self-closing gastight doors that form an air lock;
(ii) The ventilation causes greater
pressure in the space than in the Division 1 location; and
(iii) Loss of ventilation overpressure
is alarmed at a manned station;
(2) An enclosed space that has direct
access to a Division 1 location can be
considered as a Division 2 location if:
(i) The access has a self-closing, gastight door that opens into the space
and that has no hold-back device;
(ii) Ventilation causes the air to flow
with the door open from the space into
the Division 1 location; and
(iii) Loss of ventilation is alarmed at
a manned control station; and
(3) An enclosed space that has direct
access to a Division 2 location is not a
hazardous location if:
(i) The access has a self-closing, gastight door that opens into the space
and that has no hold-back device;

(ii) Ventilation causes the air to flow
with the door open from the space into
the Division 2 location; and
(iii) Loss of ventilation actuates an
alarm at a manned control station.
(g) Electrical equipment and devices
installed in spaces made non-hazardous
by the methods indicated in paragraph
(f) of this section must be limited to
essential equipment.
§ 111.105–35

Vessels carrying coal.

(a) The following are Class II, Division 1, (Zone 10 or Z) locations on a
vessel that carries coal:
(1) The interior of each coal bin and
hold.
(2) Each compartment that has a coal
transfer point where coal is transferred, dropped, or dumped.
(3) Each open area within 3 meters (10
ft) of a coal transfer point where coal is
dropped or dumped.
(b) Each space that has a coal conveyer on a vessel that carries coal is a
Class II, Division 2, (Zone 11 or Y)
space.
(c) A space that has a coal conveyer
on a vessel that carries coal must have
electrical equipment approved for Class
II, Division 2, (Zone 11 or Y) hazardous
locations, except watertight general
emergency alarm signals.
[CGD 94–108, 61 FR 28285, June 4, 1996]

§ 111.105–37

Flammable anesthetics.

Each electric installation where a
flammable anesthetic is used or stored
must meet NFPA 99 (incorporated by
reference, see 46 CFR 110.10–1).
[USCG–2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–39 Additional requirements
for vessels carrying vehicles with
fuel in their tanks.
Each vessel that carries a vehicle
with fuel in its tank must meet the requirements of ABS Steel Vessel Rules
(incorporated by reference; see 46 CFR
110.10–1), section 5–10–4/3, except as follows:
(a) If the ventilation requirements of
ABS Steel Vessel Rules section 5–10–4/3
are not met, all installed electrical
equipment must be suitable for a Class
I, Division 1; Zone 0; or Zone 1 hazardous location.

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Coast Guard, DHS

§ 111.107–1

(b) If the vessel is fitted with an approved fixed gas detection system set
at 25 percent the LEL, each item of the
installed electrical equipment must
meet the requirements for a Class I, Division 1; Class I, Division 2; Zone 0;
Zone 1; or Zone 2 hazardous location.
[CGD 94–108, 61 FR 28285, June 4, 1996, as
amended at 62 FR 23909, May 1, 1997; USCG–
2003–16630, 73 FR 65200, Oct. 31, 2008]

§ 111.105–40 Additional
for RO/RO vessels.

requirements

(a) Each RO/RO vessel must meet
ABS Steel Vessel Rules (incorporated
by reference; see 46 CFR 110.10–1), section 4–8–4/27.3.2.
(b) Each item of installed electrical
equipment must meet the requirements
for a Class I, Division 1; Class I, Division 2; Zone 0; Zone 1; or Zone 2 hazardous location when installed 460 mm
(18 inches) or more above the deck of
closed cargo spaces. Electrical equipment installed within 460 mm (18
inches) of the deck must be suitable for
either a Class I, Division 1; Zone 0; or
Zone 1 hazardous location.
(c) Where the ventilation requirement of ABS Steel Vessel Rules section
4–8–4/27.3.2 is not met—
(1) All installed electrical equipment
must be suitable for a Class I, Division
1; Zone 0; or Zone 1 hazardous location;
or
(2) If fitted with an approved fixed
gas detection system (set at 25 percent
of the LEL), each item of installed
electrical equipment must meet the requirements for either a Class I, Division 1; Class I, Division 2; Zone 0; Zone
1; or Zone 2 hazardous location.
[CGD
33045,
23909,
65200,

94–108, 61 FR 28285, June 4, 1996; 61 FR
June 26, 1996, as amended at 62 FR
May 1, 1997; USCG–2003–16630, 73 FR
Oct. 31, 2008]

§ 111.105–43
spaces.

Paint stowage or mixing

A space for the stowage or mixing of
paint must not have any electric equipment, except:
(a) Intrinsically safe electric equipment approved for a Class I, Division 1,
Group D (Zone 0 or Zone 1) location;
(b) Explosionproof electric equipment
approved for a Class I, Division 1,
Group D (Zone 0 or Zone 1) location; or
(c) Through runs of marine shipboard
cable.
[CGD 74–125A, 47 FR 15236, Apr. 8, 1982, as
amended by CGD 94–108, 61 FR 28285, June 4,
1996; 62 FR 23909, May 1, 1997]

§ 111.105–45 Vessels carrying agricultural products.
(a) The following areas are Class II,
Division 1, (Zone 10 or Z) locations on
vessels carrying bulk agricultural
products that may produce dust explosion hazards:
(1) The interior of each cargo hold or
bin.
(2) Areas where cargo is transferred,
dropped, or dumped and locations within 1 meter (3 feet) of the outer edge of
these areas in all directions.
(b) The following areas are Class II,
Division 2, (Zone 11 or Y) locations on
vessels carrying bulk agricultural
products that may produce dust explosion hazards:
(1) All areas within 2 meters (6.5 feet)
of a Division 1 (Zone 10 or Z) location
in all directions except when there is
an intervening barrier, such as a bulkhead or deck.
NOTE TO § 111.105–45: Information on the
dust explosion hazards associated with the
carriage of agricultural products is contained in Coast Guard Navigation and Vessel
Inspection Circular 9–84 (NVIC 9–84) ‘‘Electrical Installations in Agricultural Dust Locations.’’
[CGD 94–108, 61 FR 28285, June 4, 1996]

wreier-aviles on DSK3TPTVN1PROD with CFR

§ 111.105–41

Battery rooms.

Each electrical installation in a battery room must meet 46 CFR subpart
111.15 and IEEE 45–1998 (incorporated
by reference; see 46 CFR 110.10–1).

Subpart 111.107—Industrial
Systems
§ 111.107–1

Industrial systems.

(a) For the purpose of this subpart,
an industrial system is a system that—
(1) Is not a ship’s service load, as defined in § 111.10–1;

[USCG–2003–16630, 73 FR 65201, Oct. 31, 2008]

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Pt. 112

46 CFR Ch. I (10–1–11 Edition)

(2) Is used only for the industrial
function of the vessel;
(3) Is not connected to the emergency
power source; and
(4) Does not have specific requirements addressed elsewhere in this subchapter.
(b) An industrial system that meets
the applicable requirements of NFPA
NEC 2002 (incorporated by reference,
see 46 CFR 110.10–1) must meet only the
following:
(1) The switchgear standards in part
110, subpart 110.10, of this chapter.
(2) Part 110, subpart 110.25, of this
chapter—Plan Submittal.
(3) Subpart 111.01 of this part—General.
(4) Subpart 111.05 of this part—Equipment Ground, Ground Detection, and
Grounded Systems.
(5) Sections 111.12–1(b) and 111.12–
1(c)—Prime movers.
(6) Subpart 111.105 of this part—Hazardous Locations.
(c) Cables that penetrate a watertight or fire boundary deck or bulkhead must—
(1) Be installed in accordance with 46
CFR 111.60–5 and meet the flammability-test requirements of either IEEE
1202 or Category A of IEC 60332–3–22
(both incorporated by reference; see 46
CFR 110.10–1); or
(2) Be specialty cable installed in accordance with § 111.60–2.
[CGD 94–108, 61 FR 28286, June 4, 1996, as
amended at 62 FR 23910, May 1, 1997; USCG–
2003–16630, 73 FR 65201, Oct. 31, 2008]

Subpart 112.01—Definitions of Emergency
Lighting and Power Systems
Sec.
112.01–1 Purpose.
112.01–5 Manual emergency lighting and
power system.
112.01–10 Automatic emergency lighting and
power system.
112.01–15 Temporary
emergency
power
source.
112.01–20 Final emergency power source.
wreier-aviles on DSK3TPTVN1PROD with CFR

Subpart 112.20—Emergency Systems Having a Temporary and a Final Emergency Power Source
112.20–1 General.
112.20–3 Normal source for emergency loads.
112.20–5 Failure of power from the normal
source or final emergency power source.
112.20–10 Diesel or gas turbine driven emergency power source.
112.20–15 Transfer of emergency loads.

Subpart 112.25—Emergency Systems Having an Automatic Starting Diesel Engine or Gas Turbine Driven Emergency
Power Source as the Sole Emergency
Power Source
112.25–1 General.
112.25–3 Normal source for emergency loads.
112.25–5 Failure of power from the normal
source.
112.25–10 Transfer of emergency loads.

Subpart 112.30—Emergency Systems Having an Automatically Connected Storage Battery as the Sole Emergency
Power Source
112.30–1 General.
112.30–3 Normal source of emergency loads.
112.30–5 Transfer of emergency loads.
112.30–10 Restoration of normal source potential.

Subpart
112.35—Manually
Controlled
Emergency Systems Having a Storage
Battery or a Diesel Engine or Gas Turbine Driven Generator as the Sole
Emergency Power Source

PART 112—EMERGENCY LIGHTING
AND POWER SYSTEMS

Subpart 112.05—General
112.05–1
112.05–3
112.05–5

Subpart 112.15—Emergency Loads
112.15–1 Temporary emergency loads.
112.15–5 Final emergency loads.
112.15–10 Loads on systems without a temporary emergency power source.

112.35–1 General.
112.35–3 Normal source for emergency loads.
112.35–5 Manually started emergency systems.
112.35–7 Activating means.

Subpart 112.37—Temporary Emergency
Power Source
112.37–1

General.

Subpart 112.39—Battery Operated Lanterns

Purpose.
Main-emergency bus-tie.
Emergency power source.

112.39–1
112.39–3

General.
Operation.

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