What Causes a Circuit Breaker to Get Hot?

Answer

A circuit breaker works by placing two dissimilar metals in contact and allow current to flow across them. Since the metals are dissimilar, they have different expansion rates when they heat up. Thus when current passes across the junction in excess of it's design rating, the two metals separate and trip the circuit breaker.
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What Causes a Circuit Breaker to Get Hot?
Monitoring your circuit breakers can be a good way to keep tabs on your home’s electrical system, allowing you to ensure that everything’s working properly. If a circuit breaker becomes hot to the touch, however, this can be a sign of a... More »
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Q&A Related to "What Causes a Circuit Breaker to Get Hot?"
The natural resistance in copper wiring means that any current passed through it will produce heat as a byproduct. It’s natural for wiring to become warm while in use. If a
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