why should an electric appliance be earthed?
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to prevent from electric shock when short circuit occours
Danieljessacort:
It is used to provide path back to the source of current
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You will get an electric shock if the live wire inside an appliance, such as a cooker, comes loose and touches the metal casing. However, the earth terminal is connected to the metal casing, so the current goes through the earth wire instead of causing an electric shock.
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