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mazzonetv 10-02-2012 11:06 AM

2 - 2oa gfci breakers on 1 - 3 wire cable
Hi all,

I am doing a master bath renovation and ran a 12/3 bx cable up to the bathroom. One 20A circuit to feed our new tub and one 20a circuit to feed our in floor electric heat. Obviously i want to protect these two circuits with GFCI breakers, however before hooking up the neutral the wrong way I want to ask here. I was thinking to run the curly wire from each breaker to the neutral bar, Then run the neutral from the 3 wire cable to one breaker, and then run a wire from the neutral of one breaker to the neutral of the other (basically jumping the neutral and having two neutral wires going into one breaker) - is this the right way? the other option I guess is to tie my neutral to two wires and make two "pigtails" in the panel - bringing one neutral to each of the breakers.

Any advice is much appreciated...

thank you!!!

jbfan 10-02-2012 11:11 AM

It will not work with induvidual breakers.
You need a 2 pole breaker, or you need gfci receptacles.
Your single pole gfci breaker will trip with the shared neutrals.

mazzonetv 10-02-2012 11:22 AM

Thank you for such a quick answer! Much appreciated! Would it be ok to put one circuit (for my floor heat) on a gfci breaker and the other circuit for my tub on a gfci outlet - or is that essentially doing the same thing? If I used a 2 pole gfci breaker would that be a better solution? Should I just bring up another 2 wire cable and call it a day?

jbfan 10-02-2012 11:25 AM

That would be essentially the same thing.
A 2 pole gfci breaker is expensive, so if the walls are still open, I would opt. for another cable.

mazzonetv 10-02-2012 11:34 AM

Thanks - not the answer I wanted but glad I checked!! I guess I'm running another cable tonight...

Appreciate the advice!

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