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 ...

While doing a new-construction home inspection recently, I came across a furnace with no disconnect / service switch in the same room. Usually, it's just a light switch that controls power to the ...

AUSTIN (KXAN) — Nearly 7,500 Austin Energy customers lost power Friday morning. Austin Energy said the cause was a circuit lockout. Austin Energy said a circuit lockout is like a safety switch. The ...

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 ...