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.

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 ...

[Avionics Today 09-12-2014] Peerless Electronics, distributor of switches, circuit breakers, relays and sensors for the aviation industry, has begun distributing the full line of Master Lock Aviation ...