Question

what is an earth wire?? ​

Answer 1

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An earth wire is literally a wire that goes down into the earth - also known as an “earth ground.” It's meant to be the electrical path that unwanted electricity (such as lightning or a short-circuit) finds easiest to take.

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Answer 2

An earth wire is the wire which is used for the earthing of the excess electricity from an electrical appliance. The current passes by the earth wire because, very low resistance is offered by the earth wire. If the live wire touches the earth wire then it will cause short circuit. It is used to protect us from an electric shock. It does this by providing a protective conductor for a fault current to flow to the earth.It is denoted by green coloured wire.