Why do we use earth wires

[Guest]

Hello,
why do we use earth wires?
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[Kewlx25]

If a wire shorts, you want it going to earth instead of killing someone.

 

[jamesjocky]

The Earth wire is there to earth electrical devises that are made of metal and are not double insulated. if there was to be a malfunction in the applience then you can get a really bad shock if an earth wire is not present. if there is any free electricity roming around then the earth wire will send it down to earth instead of through your body.

 

[mohammed chambas]

earth wire can even give you standed electricity.also give you standed newtry for not using newtry it self the one coming from the mains.
it make your meter less ran seldom.