Posted by on 6/3/2020 to News
Regardless what side of the argument you're on the reason for common disconnecting means remains the same. What's the big deal? Well very simply it's safety. What the NEC is all about. most untrained people, like an appliance installer, wouldn't understand that outlet is or could be supplied by two circuits, on two separate breakers. If this code didn't exist or was adhered to, you would turn off the single breaker you thought was associated with the 1 device you are focusing on, pull the outlet and get zapped by the other circuit feeding it. To complicate it, there is usually poor access to these in the back of a kitchen cabinet and tangled between some plumbing. With a common trip, 2pole breaker, or 2 single breakers with a handle tie, you are forced to shut both off.
Many times in the argument or discussion of these codes, the intent it lost for sake of argument. When I read the code, specific to something new I don't fully understand, I'm always looking for the intent, why is this important? More specifically why is it dangerous? Since the NEC is, in my mind, foremost about safety. A question we should all ask is, what are the safety implications, and more importantly for the electrician, what are the liability implications.