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Grounding (also called earthing) refers to the practice of providing an un-energized path back to the main neutral. This is done to allow any electrical faults to flow into that circuit, instead of anyone touching the fault. Use with the [electrical] tag.

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Hot and ground shorted with breaker off, but has normal voltage after breaker on [duplicate]

I swapped an old outlet and a pair of switches on the same circuit today (same breaker), and used a multimeter to check the connectivity to make sure I installed them correctly. With the breaker off, …
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