Engine: Electricity

1. A The circuit must be grounded first, then tested and proved dead with a live-line tester.
2. B The circuit must be grounded first, then tested and proved dead with an off-line tester.
3. C The circuit must be tested and proved dead first with an off-line tester, then grounded.
4. D The circuit must be tested and proved dead first with a live-line tester, then grounded.

Tip: press A-D to answer