SC Lightning Protection Practice Questions - South Carolina Lightning Protection Systems Contractor Examination Exam

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Unless they are listed, stainless-steel or copper- or zinc-coated steel grounding electrodes in NEC 2020 250.52(A)(5) shall be at least which diameter?

3/8 in (9.5 mm) 1/2 in (12.7 mm) 5/8 in (15.87 mm) 1 in (25.4 mm)

Correct Answer:

5/8 in (15.87 mm)

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