Question

How can you prevent damage due to be overloading of electric current?

Answer 1

The current flowing in domestic wiring at a particular time depend on the power ratings of the appliances being used.If too many electrical appliances of high power rating like heater, A.C etc are used  at same time, they draw an extremely large current from the circuit. This is known as Overloading .
Over loading can also occur if too many appliances are connected to single socket.
Prevention From Overloading:

A fuse is a safety device having a short length of a thin, tin coated copper wire having low melting point, which melts and breaks the circuit and prevents electrical appliances from getting damage[if the current exceeds a safe value].
A fuse wire is always connected in series in the electric circuits.
Nowadays Instead of Fuse , MCB's are also used.

Answer 2

Answer:

A fuse is a safety device having short length of a thin coated copper wire have low melting point which melts and breaks the circuit and prevents electrical appliances from getting damaged