What is overloading? When does it occur? What does it cause? How can overloading be avoided?

Explanation

A flow of large amount of current in a circuit, beyond the permissible value of current, is called overloading.
It occurs when many electrical appliances of high power rating, such as a geyser, a heater, an oven, a motor, etc., are switched on simultaneously. This causes fire.
Overloading can be avoided by not connecting many electrical appliances of high power rating in the same circuit.