Before work may safely commence on a high voltage system, what must first be done after disconnection and isolation?

Question

Accepted Answer

The circuit must be tested and proved dead first with a live-line tester, then grounded.

Answer

The circuit must be tested and proved dead first with an off-line tester, then grounded.

Answer

The circuit must be grounded first, then tested and proved dead with an off-line tester.

Answer

The circuit must be grounded first, then tested and proved dead with a live-line tester.

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