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The ground earth wire serves two purposes:

To trip the protection as quickly as possible if theres an out of balanced current or a fault to earth.

and to bring the user to the same potential to the earth if there is a fault and the protection doesnt trip. that way because you are at the same potential as earth you will not get electrocuted.

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13y ago
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14y ago

So that in the event of an electrical problem with the device, YOU won't be killed.

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Q: Why is there a ground wire?
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