Question

Ot is necessary to connect an earth wire to electric appliance having metallic covers. Why?

Answer 1

Metal is a good conductor of electricity so there are chances of getting a shock....

Earth wire absorbs shock and sends it to ground thus preventing the person from getting a shock...

That is why Earth wire is connected to electrical appliances having metallic covers .

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Answer 2

• The earth wire provide low resistance conducting path for current
• in the case of leakage of current to the metallic body of any appliances the earth wire absorbs the current and flows through to the earth where the user is saved from an electric shock.
• Earth wire has green insulation.

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