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Old 01-30-2009, 12:04 PM   #1
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I have always thought that you couldn't put two wires on one breaker ? a fellow worker said it is legal by code was wondering if he is right dont have a code to find out for sure
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Old 01-30-2009, 12:36 PM   #2
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You cannot put two wires under one screw on a CB, unless that CB is designed for such use. [110.3(B), et al]
The only brand I am aware of that allows this is Square D.

It's not the end of the world though.. if you have one circuit heading in two different directions ~ just wire nut them together along with a tail to reach the CB [312.8]
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Old 01-30-2009, 12:39 PM   #3
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You can install more than one wire under the lug on a breaker only if the breaker and lug are listed and designed for more than one wire.

You can always splice the two wires together and bring a single wire to the breaker assuming the combine calculated loads don't exceed the rating of the breaker.

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Old 01-30-2009, 12:39 PM   #4
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Looks like Celtic beat me to it.

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Old 01-30-2009, 11:30 PM   #5
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Square D is the only 120/240 volt one I know of as well, and it's only 14's, 12's and 10's on 10 - 30 amp breakers.

Several manufacturers 277/480 breakers will accept more than one wire though. Again, small wire and low amp breakers.

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Old 01-31-2009, 12:35 AM   #6
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cutler hammer CH 120 breaker accepts two #12's
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