Episode 9 – What’s Inside A Breaker (How Do Electrical Breakers Work?)

This episode is all about breakers, from the outside-in.  I cover the differences between single-pole, two-pole, and 3-pole breakers. I talk about how a breaker is a simple spring-held mechanical switch that operates by an internal electromagnet.

Finally I take a Square D single-pole breaker apart and show you how a breaker trips, and how the mechanics of the inside of a breaker works.

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**Disclaimer – These videos are for training purposes alone, all work done on electrical systems should be done by a licensed and insured electrical contractor.  If you are not an electrician, do not attempt any of the work you are seeing in these videos.**



  1. Thanks for explaining the how and why things work, not just it’s place and purpose. Best apprentice oriented content on the web!

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