Is it permissible under the 2014 NEC to feed two independent 120VAC branch circuits from a common trip (aka double pole) circuit breaker? The circuits do not share a neutral wire, and are ordinary 20A branch circuits otherwise.

  • I'm not a code expert so I wont post an answer - but I would assume it is allowed. If you have two independant circuits that share a junction box somewhere it would improve safety - since someone cant turn off just one of the curcuits feeding that box and still have the other energized. – Grant Feb 14 '15 at 15:26
  • Logically it wouldn't matter. Worse case it would be viewed as an inconvenience, where multi-wire circuits it's for safety; it ensures the shared neutral would have no imbalanced load on it. If they're not sharing the neutral I can't see why it would be an issue or even matter. Still on 2011 though so I won't answer. The only thing that stands out as an issue is if one of them is for some type of safety/alarm system. – ChiefTwoPencils Feb 14 '15 at 17:22
  • ...but when you say common trip do you mean double pole/single throw? If so, they're intent is for 240V circuits but are functionally the same. So, going the other way is allowed. IOW, a two pole/double throw with a tie can be used in place of a two pole single throw provided it's rated 12/240; most are today. – ChiefTwoPencils Feb 14 '15 at 17:25
  • One place where I'd question if it's allowed is where independent circuits are required by code. For example, in a kitchen, I believe two separate 20 amp outlet circuits are required; I'd question if these could be on a common throw breaker. – DoxyLover Feb 14 '15 at 17:42
  • @ChiefTwoPencils -- yes, I do mean double pole when I say 'common trip' – ThreePhaseEel Feb 14 '15 at 18:05

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