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

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A concrete-encased electrode complying with NEC 2020 250.52(A)(3) shall consist of at least 20 ft of which of the following, encased by at least 2 in of concrete in contact with the earth?

8 AWG bare copper only 1/2 in conductive-coated rebar or 4 AWG bare copper 3/8 in rebar only Listed 1/2 in aluminum conductor

Correct Answer:

1/2 in conductive-coated rebar or 4 AWG bare copper

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