In order for a live-line tester to be used to test and prove dead a high voltage circuit, what must be done to verify the ability of the tester to detect a voltage?

Correct Answer: Option C — The live-line tester should be checked by connecting to a known high voltage source before and after the circuit to be worked upon is tested.

IEEE 45 high voltage safety procedures require testing live-line detectors against a known energized source immediately before and after testing the isolated circuit. This pre- and post-test verification ensures the instrument is fully functional and guarantees reliability before personnel rely on its dead reading.