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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.
3
votes
Is it okay to connect 2 ground wires to a single ground screw?
The reason that wiring devices have grounding connections that accept only one wire is that otherwise, if two ground wires were connected to the device, then if someone later removed that wiring device … and then re-applied power without wire-nutting the grounding conductors, there would be a break in the ground path for the downstream wiring but perhaps not the hot wires. …