Question

Answer the following questions related to a three-pin plug. 

a. How is the earth pin different from other pins? 

b. In which of the three connecting wires should a switch be connected?

Answer 1

a. The length and thickness of the earth pin is more than that of other pins. Since the length is more, when the three-pin is introduced into the socket, the earth pin comes into contact with the circuit first. 

b. Phase wire.