[Mike] shows us the inner workings of a 240VAC circuit breaker and explains how the different safety features in the device work. In proper MikesElectricStuff form, [Mike] finds out what it ...

a “bi-metallic strip” inside the circuit breaker starts to heat up. The bi-metallic strip consists of two different metals bonded together, and these metals have different thermal expansion rates.

[Learn Engineering] has a very clear video about what goes on inside a circuit breaker that’s worth the eight minutes to watch. You can see the video below. The handle is a mechanical ...