Mixing 12ga & 14ga

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  #1  
Old 12-18-04, 08:48 AM
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Mixing 12ga & 14ga

Can I legally tie in a new 14ga romex lighting circuit to an existing 12ga circuit protected with a 20 amp breaker?
Also, can two 14ga romex wires be run through the same metal box connector? I understand only one 12 ga romex can be run per connector, but two 14 ga is ok.
Thanks.
Bill
 
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Old 12-18-04, 08:51 AM
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Inasmuch as 14 gauge wire is not rated for 20 amps, it cannot be protected by a 20 amp breaker.

Hope this helps.
 
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Old 12-18-04, 09:10 AM
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Should I just use 12 ga romex instead?

Should I just use 12 ga romex instead?
 
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Old 12-18-04, 09:19 AM
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Originally Posted by wmozer
Should I just use 12 ga romex instead?
Yes...on a 20AMP circuit, 12 ga is required...

The only way to use 14 ga would be to drop the breaker to a 15 amp, and that would be silly, especially since you are putting more of a load on the circuit.
 
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Old 12-18-04, 12:05 PM
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There is no real valid reason to add a different size wire to a circuit. This only serves to either casue a code violation or at the least confuse anyone working on the circuit.
Even if you have spare wire but is the wrong size the $20 or $25 you'll need to spend to get the right wire will be well spent in the long run.

You can put two 12/2, or two 14/2, or one of each, in a standard NM connector.
 
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Old 12-18-04, 12:30 PM
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Thanks for your response

Thanks for your response to my connector question.
Bill
 
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