46 C.F.R. § 111.05-17 Generation and distribution system grounding.
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The neutral of each grounded generation and distribution system must: (a) Be grounded at the generator switchboard, except the neutral of an emergency power generation system must be grounded with: (1) No direct ground connection at the emergency switchboard; (2) The neutral bus permanently connected to the neutral bus on the main switchboard; and (3) No switch, circuit breaker, or fuse in the neutral conductor of the bus-tie feeder connecting the emergency switchboard to the main switchboard; and (b) Have the ground connection accessible for checking the insulation resistance of the generator to ground before the generator is connected to the bus.
Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.05—Equipment Ground, Ground Detection, and Grounded Systems
§ 111.05-17 Generation and distribution system grounding.
