46 CFR §169.672
- (a)Wiring for power and lighting circuits must have copper conductors, of 14 AWG or larger, and—
- (1)Meet Article 310-8 and Table 310-13 of the National Electrical Code;
- (2)Be listed as “50 volt boat cable”; or
- (3)Meet subpart 111.60 of this chapter.
- (b)Wiring for power and lighting circuits on new vessels must have stranded conductors.
- (c)Conductors must be sized so that—
- (1)They are adequate for the loads carried; and
- (2)The voltage drop at the load terminals is not more than 10 percent.