Code of Federal Regulations Title 46. Shipping § 46.111.60–7 Demand loads

Generator cables

115 percent of continuous generator rating.

Switchboard bus-tie, except ship's service to emergency switchboard bus-tie

75 percent of generating capacity of the larger switchboard.

Emergency switchboard bus-tie

115 percent of continuous rating of emergency generator.

Motor feeders

Article 430, NFPA NEC 2002 (incorporated by reference;  see 46 CFR 110.10–1).

Galley equipment feeder

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.

Lighting feeder

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 feeder

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.