State the consequences that can lead for short circuit. Out of the major causes of of fire in office building is short circuiting list three factors which may lead to short circuit.
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Short circuit can take place when the insulation of the wire is torn off and when two wires touch, then current can flow from one to the another.
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ANSWER :
Short circuit : is caused by touching of live wires and neutral wire.
It occurs as a consequence of
- failure of electrical insulations due to which live wire comes in direct contact with neutral or earth wire.
- presence of external conducting material ( such as water ) that is introduced accidently into the circuit.
- electrical appliances are forced to operate when its moving parts are jammed.
- connection of current carrying parts of electrical equipments to one another due to human or natural cause or
- use of less rating wires.
When this happens, there is a flow of an excessive electric current which can damage the circuit and may also cause electrical fires.
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