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Code of Federal Regulations (Last Updated: July 5, 2024) |
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Title 46 - Shipping |
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Chapter I - Coast Guard, Department of Homeland Security |
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SubChapter J - Electrical Engineering |
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Part 111 - Electric Systems - General Requirements |
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Subpart 111.60 - Wiring Materials and Methods |
§ 111.60-7 - Demand loads.
Latest version.
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§ 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.
Type of circuit Demand load Generator cablesCables 115 percent of continuous generator rating. Switchboard bus-tieties, except ship's service to emergency switchboard bus-tieties 75 percent of generating capacity of the larger switchboard. Emergency switchboard bus-tieties 115 percent of continuous rating of emergency generator. Motor feeders Article 430 , of NFPA NEC 2002 70 (incorporated by reference; see 46 CFR § 110.10–110–1 of this subchapter). Galley equipment feederfeeders 100 percent of either the first 50 KW 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. Lighting feederfeeders 100 percent of the connected load plus the average active circuit load for the spare switches or circuit breakers on the distribution panels. Grounded neutral of a dual voltage feederfeeders 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; USCG–2020–0075, 88 FR 16364, Mar. 16, 2023]