DC Electrician Practice Questions - District Of Columbia Journeyman Electrician License Exam

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Per NEC 2020 in District of Columbia, what ground-fault protection is required for 480Y/277V services rated 1,000A or more?

Not required GFP set at maximum 1,200 amperes GFP set at maximum 3,000 amperes Standard overcurrent protection only

Correct Answer:

GFP set at maximum 1,200 amperes

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