Electrical Wiring in the Home/Sharing a neutral wire


Hi Bob,
I plan to bring 2-20 amp circuits to a part of my house using 12-3 wire. Will sharing the neutral wire on both circuits be a problem using GFCI outlets? Thanks for any advice.

If you use GFCIs after the split, it will not be a problem.  You can not use them before the split.

While you save money with a shared neutral, it can be a problem. If the neutral becomes disconnected, the two circuits will be in series with each other at 220 volts, which will damage whatever is on the circuits.  Make sure you use a double pole breaker, so that no one gets shocked with one breaker on, and one off.
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Electrical Wiring in the Home

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Bob Sponaugle


Just about any home wiring question. (not appliance repair) I have done all kinds of home wiring for myself, including adding a new breaker box, etc. Please, questions from North America only. Please be specific with details.

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