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

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When air terminals taller than 24 in (610 mm) are used, NFPA 780 (2020) permits perimeter or ridge spacing up to which maximum, provided the rod is supported at not less than one-half its height?

20 ft (6.1 m) 25 ft (7.6 m) 30 ft (9.1 m) 50 ft (15.2 m)

Correct Answer:

25 ft (7.6 m)

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