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1. To prevent the buildup of static electricity

2. For safety-a voltage short will blow a fuse or trip a breaker. If hot AC gets to

a metal cabinet that is not grounded, the the cabinet will be "hot" and if you

get between "hot" and ground you could be shocked and possible death.

Others can add more I'm sure.

("Earthing" is another term for "grounding" in electrical wiring.)

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10y ago

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