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Overloading the circuit or a device like a power strip will cause the wiring to heat up at it's weakest point and can result in fire, it can also cause insulation to melt resulting in an electrical short.

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Q: What are the causes of fire in electrical circuits?
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What causes resistive heating and then a fire?

Resistive heating occurs when electrical current flows through a material with resistance, causing the material to heat up. If the heat generated is not properly dissipated, it can accumulate and lead to a fire if the material's ignition temperature is reached. Overloading electrical circuits, using damaged electrical cords, or faulty connections are common causes of resistive heating and potential fire hazards.


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