What is the function of an earth wire? Why is it necessary to earth metallic appliances?

The metallic body of electric appliances is connected to the earth using earth wire so that any leakage of electric current is transferred to the ground. This prevents any electric shock to the user.


The metallic body is connected to the earth wire, which provides a low resistance conducting path for the current. Thus, it assures that any leakage of current to the appliances’ metallic body keeps its potential to that of the earth, and the user may not get a severe shock.

  •  Grounding wires serve as an alternate path for the current to flow back to the source rather than go through anyone touching a dangerous appliance or electrical box.
  • Some appliances, such as vacuum cleaners and electric drills, do not have an earth wire.
  • The ground is an attractive place for electricity to flow because it is positively charged,

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  1. This blog is immensely insightful. It gives a clear description about earth wire and why is it necessary to earth metallic appliances. Great piece of writeup.

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