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

Compared with a sustained AC fault, a typical lightning stroke is best described as which kind of event?

A low-current, long-duration discharge lasting several seconds A high-current, very short-duration impulse, often lasting tens of microseconds A constant 60 Hz current limited by transformer impedance A DC current limited to the 15 A branch-circuit rating

Correct Answer:

A high-current, very short-duration impulse, often lasting tens of microseconds

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