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CODE OF FEDERAL REGULATIONS – TITLE
33 – NAVIGATION AND NAVIGABLE WATERS
PART 183—BOATS AND ASSOCIATED EQUIPMENT
Subpart I—Electrical Systems
Source: CGD 73-217, 42 FR 5944, Jan.
31, 1977, unless otherwise noted.
GENERAL
Sec. 183.401—Purpose, applicability,
and effective dates
(a) This subpart applies to all boats that have
gasoline engines, except outboard engines, for electrical
generation, mechanical power, or propulsion.
(b) [Reserved]
[CGD 73-217, 42 FR 5944, Jan. 31, 1977,
as amended by CGD 81-092, 48 FR 55736, Dec. 15, 1983; USCG-1999-5832,
64 FR 34716, June 29, 1999]
Sec. 183.402—Definitions
As used in this subpart—
AWG means American Wire Gauge.
Electrical component means electrical equipment
such as, but not limited to, conductors, solenoids, motors,
generators, alternators, distributors, resistors, appliances
and electrical control devices.
Pigtails means external power conductors or
wires that are part of electrical components and appliances,
such as bilge pumps, blowers, lamps, switches, solenoids,
and fuses.
Sheath means a material used as a continuous
protective covering, such as electrical tape, molded rubber,
molded plastic, or flexible tubing, around one or more insulated
conductors.
[CGD 73-217, 42 FR 5944, Jan. 31, 1977,
as amended by CGD 85-098, 52 FR 19728, May 27, 1987; CGD 96-026,
61 FR 33670, June 28, 1996]
Sec. 183.405—General
Each electrical component on a boat to which
this subpart applies must meet the requirements of this subpart
unless the component is part of an outboard engine or part
of portable equipment.
MANUFACTURER REQUIREMENTS
Sec. 183.410—Ignition protection
(a) Each electrical component must not ignite
a propane gas and air mixture that is 4.25 to 5.25 percent
propane gas by volume surrounding the electrical component
when it is operated at each of its manufacturer rated voltages
and current loadings, unless it is isolated from gasoline
fuel sources, such as engines, and valves, connections, or
other fittings in vent lines, fill lines, distribution lines
or on fuel tanks, in accordance with paragraph (b) of this
section.
(b) An electrical component is isolated from
a gasoline fuel source if:
(1) A bulkhead that meets the requirements
of paragraph (c) of this section is between the electrical
component and the gasoline fuel source;
(2) The electrical component is:
(i) Lower than the gasoline fuel source
and a means is provided to prevent fuel and fuel vapors
that may leak from the gasoline fuel source from becoming
exposed to the electrical component; or
(ii) Higher than the gasoline fuel source
and a deck or other enclosure is between it and the gasoline
fuel source; or
(3) The space between the electrical component
and the gasoline fuel source is at least two feet and the
space is open to the atmosphere.
(c) Each bulkhead required by paragraph (b)(1)
of this section must:
(1) Separate the electrical component
from the gasoline fuel source and extend both vertically
and horizontally the distance of the open space between
the fuel source and the ignition source;
(2) Resist a water level that is 12
inches high or one-third of the maximum height of the bulkhead,
whichever is less, without seepage of more than one-quarter
fluid ounce of fresh water per hour; and
(3) Have no opening located higher than
12 inches or one-third the maximum height of the bulkhead,
whichever is less, unless the opening is used for the passage
of conductors, piping, ventilation ducts, mechanical equipment,
and similar items, or doors, hatches, and access panels,
and the maximum annular space around each item or door,
hatch or access panel must not be more than one-quarter
inch.
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