Question

explain overloading short circuiting and earthing in an domestic circuit

Answer 1

Overloading-an electric circuit is said to be overloaded if all the electrical appliances in the circuit draw more current then the permitted limit. overloading results in excess of heating.

short circuiting - short circuiting takes place when the live and neutral wire come in direct contact with each other .The life (positive )wire and neutral (negative )wire comes in direct contact with each other .

Earthing- earthing allows the excess current to pass into the earth .Suppose a conductor is exposed to the appliance due to bad insulation. if a person touches such an appliance he will receive a serious shock .if the metal casing of the appliance is connected to the earth with the help of the conductor the metal casing will be then at the same potential as the earth that is zero volt .if there is a leakage of the current, the current will safely flow to the earth .The earth connection can also save the appliance from the damage.

Hope it helped;-)

Answer 2

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Electrical circuits are designed to handle a limited amount of electricity. An overload occurs when you draw more electricity than a circuit can safely handle. If there were no breaker in the circuit, an overload would cause the circuit wiring to overheat, which could melt the wire insulation and lead to a fire.