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

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NFPA 780 (2020) 4.8.1 permits the protective-angle method with one angle from grade to 25 ft and another from 25 ft to 50 ft. Which method must be used to evaluate protection of surfaces more than 50 ft below the strike-termination device?

The 45-degree cone method only The placement (layout) method only The 150 ft rolling-sphere method A single 63-degree angle from the tip to grade

Correct Answer:

The 150 ft rolling-sphere method

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