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artman 06-28-2008 05:27 PM

240V Kiln Outlet to Air Conditioner Outlet
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I'm replacing a 240V 50A kiln outlet with a 240V 15A breaker, which will have 1 outlet only for a air conditioner 15A. I want to be sure I've done the wiring correctly.
Here is a diagram-

jrclen 06-28-2008 07:47 PM

That is correct assuming the green does not connect to the circuit breaker. :thumbsup:

artman 06-28-2008 09:58 PM

Thanks, John! The green comes into the box, attaches to a 1 location of 4 screw bar, which the outlet green also connects to. There is no polarity issues with the two blacks, correct?

micromind 06-29-2008 12:48 AM

On a 240 volt circuit, polarity doesn't make any difference at all. Polarity only matters where the neutral is involved. There's no neutral in your circuit. Your drawing will work just fine.


Stubbie 06-29-2008 01:21 AM


He may encounter a problem getting 50 amp wire to connect to a 20 amp breaker. I believe most 20 amps will accept 8 awg but not 6 awg. This is of course assuming he used a 60 C column cable for the supply to the kiln.

micromind 06-29-2008 01:29 AM

Good point, I guess you could pigtail it. There's no way you'd get even an 8 into a 20 amp receptacle.


artman 06-29-2008 02:14 PM

awg to breaker
1 Attachment(s)
Thank You, for your help!
I was able to attach the heavy kiln wire into the breaker box connectors at the top. I'm not versed in wire sizes- they were about 1/4 dia. multi-strand copper.
From the breaker, I ran 12/3 out to the outlet, this I did not mention. Looks good?

micromind 06-29-2008 02:29 PM

Perfect. It'll work just fine, and I don't see any code issues.


artman 06-29-2008 06:21 PM

Rob- I sure appreciate your help. Next time I'll hire it out! A bit too much anxiety and a few too many trips for conduit hardware.

John, Stubbie, Thank You, all!


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