Ground-Fault Protection of Equipment

Ground-fault protection of equipment shall be provided for solidly grounded wye electrical systems of more than 150 volts-to-ground, but not exceeding 600V phase-to-phase for each individual device used as a building or structure main disconnecting means rated _____ or more, unless specifically exempted.

a) 1,000A
b) 1,500A
c) 2,000A
d) 2,500A

See answer and applicable Code reference

The correct answer is: a) 1,000A

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