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...................... 115 percent of continuous
generator rating.Switchboard bus-tie, except ship's 75 percent of generating
service to emergency switchboard bus- capacity of the larger
tie. 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 100 percent of the capacity of
feeder. 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]