The answer is actually quite simple, but let me first explain why that locking device is there. Section 422.30 of the National Electric Code (NEC) requires a disconnecting means for all appliances.

To ensure compliance under 1910.147, hazardous energy sources, such as electrical, pneumatic, hydraulic, chemical and thermal energy, need to be properly isolated to a zero-energy state through a ...

You probably already know how to reset a circuit breaker, but what about your kids or baby-sitter? Use this tutorial to show ...

Circuit breakers are easily switched on and off which can cause problems for professionals carrying out an intervention. Shocks and extreme injury can be the results of prematurely reactivating a ...

How can you tell if a breaker is good or not? How can you tell if a breaker is good or not? What you don't want to do is "test by tripping." That method merely proves the breaker can be opened — it ...