Using 12/3 on 15Amp circuit


Old 03-14-16, 08:02 PM
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Join Date: Jan 2015
Location: United States
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Using 12/3 on 15Amp circuit

I am 99% sure this is OK but just want to check with the experts here....
I am putting some lights with 3 way switches on 15Amp circuit.
I have plenty of 14/2 for all the lights and to go to the main box, but I don't have any 14/ put between the switches....instead, I do have 12/3 so just want to use that.

I know this gauge is hard to pull and generally PITA to work with but I don't want to buy any new 14/3 if I have a lot of spare 12/3.

Please confirm that it is OK

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Old 03-14-16, 08:12 PM
Join Date: Nov 2015
Posts: 914
Yes it is ok. There is nothing wrong with using large gauge wire than required.
Old 03-14-16, 08:13 PM
Tolyn Ironhand's Avatar
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It is OK.
Old 03-14-16, 10:14 PM
pcboss's Avatar
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Just watch the box fill. .

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