Question

(a) What is meant by short-circuiting in electric supply?
(b) What is the function of earth wire in electrical instruments?
(c) What is the usual current rating of the fuse wire in the power supply line which runs
​(i) lights and fans, and (ii) appliances of 2 kW power?

Answer 1

Usual Current for Lights & Fans is 15-20 A

Explanation:

a.) When in between two conductors, that are intended for supplying electrical power, gets a low resistance connection in the circuit, it is referred to as Short circuited.

b.) When it is excessive electricity passed from electrical equipment, then in terms of preventing overloading of a live wire, there is earth wire, that absorbs the excessive amount. Such electrical equipment is earthed, as such wires pass the current from source to earth.

 

c.) Whenever there is overloading, high voltage passing or overloading or short of circuiting, then we make use of a Fuse Wire (Safety Measurement Device)

i.) Fuse wire Capacity is 15-20 A

ii.)Fuse Wire Usual Capacity is 2 kW but we take only 50-60 A or lower than this as power.