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?

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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.

Answer

The live-line tester need not be checked prior to testing the circuit to be worked upon as long as it has not been declared inoperative.

Answer

The live-line tester should be checked by connecting to a known high voltage source only before testing the circuit to be worked upon.

Answer

The live-line tester should be checked by connecting to a known high voltage source only after testing the circuit to be worked upon.

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