Question

What causes a fuse to blow in a circuit?

Answer 1

Answer:

There are two conditions that can cause a fuse to blow. First, and most commonly, when too many lights or plug-in appliances draw power from the circuit, it can overload the capacity of the fuse and cause the metal ribbon inside the fuse to melt through.

Answer 2

There are two conditions that can cause a fuse to blow. First, and most commonly, when too many lights or plug-in appliances draw power from the circuit, it can overload the capacity of the fuse and cause the metal ribbon inside the fuse to melt through. The result is that all lights, outlets, and appliances powered by the circuit will go dead suddenly

Another cause of a blown fuse occurs when a hot wire somewhere in the system touches either the grounding pathway or a neutral wire. This is what is known as a short circuit, and it typically occurs because of loose wire connections, damaged wires somewhere along the circuit, or an internal wiring problem in some appliance plugged into the circuit.

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