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 B — 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.

High voltage safety mandates testing live-line detectors against a known energy source immediately before and after use. This 'test-before-and-after' protocol ensures instrument reliability, preventing catastrophic failure from a malfunctioning tester during dead-circuit verification under IEEE 45 and marine high-voltage safety standards.