Question

reasons for excessive current in a e
lectric circuit

Answer 1

An overcurrent can be caused by overloading the circuit or by a short circuit, a ground fault, or an arc fault. Circuit breakers and fuses protect circuit wiring from damage caused by overcurrent.
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Answer 2

The very first thing you should do is make sure the instruments are actually working correctly .

these are the reason for excessive current in a electric circuit

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