What causes short circuit?
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A short circuit is when there is a low resistance connection between two conductors that are supplying electrical power to a circuit. This would generate an excess of voltage streaming and cause excessive flow of current in the power source. The electricity will flow through a 'short' route and cause a short circuit.
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A fault with the insulation- If the circuit wire insulation is faulty, the current can then pass to neutral wire, causing a surge in electricity and a short circuit. The circuit wire insulation can be negatively effected by age and use,as well as screws and nails, and animals like rats
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