Question

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

Answer 1

The function of an earth wire

1. A metallic body of high power rating electrical equipment is earthed by ground wire, that protects us from electric shocks.
2. It also avoids live wire overloading or permits any leakage of electric charge via the body of metallic appliances that may easily be transmitted to the ground. That is why it is vital to earth metallic equipment.

Its importance to earth metallic appliances.

1. Grounding wires provide an alternate channel for electricity to go back to the source rather than via anybody who comes into contact with a potentially harmful device or electrical box.
2. Some electrical gadgets, including vacuum cleaners as well as drills, don't even have an earth wire.

Hence, the earth wire is a particular wire with low resistance and a high melting point that avoids live wire overloading and current leakage through the ground.