120.370—General grounding requirements.
(a)
A vessel's hull must not carry current as a conductor except for the following systems:
(1)
Impressed current cathodic protection systems; or
(2)
Battery systems for engine starting.
(b)
Receptacle outlets and attachment plugs for portable lamps, tools, and similar apparatus operating at 100 volts or more, must have a grounding pole and a grounding conductor in the portable cord.
(c)
Each nonmetallic mast and top mast must have a lightning ground conductor.