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

What is the minimum diameter of a solid Class I copper air terminal in NFPA 780 (2020)?

1/4 in (6.4 mm) 3/8 in (9.5 mm) 1/2 in (12.7 mm) 5/8 in (15.9 mm)

Correct Answer:

3/8 in (9.5 mm)

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