46 C.F.R. § 169.676 Grounded electrical systems.
Title 46 - Shipping
(a) Except as provided in paragraph (b) of this section, each electrical system must meet subpart 111.05 of this chapter. (b) Ground detection is not required.
Title 46: Shipping
PART 169—SAILING SCHOOL VESSELS
Subpart 169.600—Machinery and Electrical
Electrical Installations Operating at Potentials of 50 Volts or More on Vessels of Less Than 100 Gross Tons
§ 169.676 Grounded electrical systems.

