running wires for lights


Old 04-12-05, 03:57 PM
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running wires for lights

I have 20 amp breaker running 12-3 romax and I want to splice into this line with some 14-2 romax to connect some lights with switches. Any problems? Or should it be 12-3 cable. thanks, jim
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Old 04-12-05, 05:45 PM
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Yes there is a problem.

14 ga. wire should be protected by a 15 amp breaker. The 20 amp breaker will allow the wire to overheat and could cause a fire.
Old 04-13-05, 05:46 AM
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HI, in my non expert DIY opinion, can't you keep the present wiring that you want to splice into and change the breaker to a 15amp one? That way you do not have to change the first #12 wire. And then you can continue with #14. Just a thought.
Old 04-13-05, 06:40 AM
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Yes, there is that option. However, it's only feasible if you are not already using more than 15 amps on the circuit (and you don't plan to in the future). Unless it's very hard to do, I'd rather replace all the #14 with #12.
Old 04-14-05, 12:09 PM
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You say it is 12-3 Romex - is this a switch loop or part of a multi-wire circuit? What else is it serving?

As you can see mixing gauges is not a good idea.
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