Double Pole Square D - double tapped?

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onthwtr

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Milwaukee, WI
Looked at a Square D 240V double throw QO 30 amp breaker with four wires. Anyone know if this is UL listed for double tap?
Panel was not marked so not sure what the load is. Suspect one was the A/C unit...
 
onthwtr said:
Looked at a Square D 240V double throw QO 30 amp breaker with four wires. Anyone know if this is UL listed for double tap?
Panel was not marked so not sure what the load is. Suspect one was the A/C unit...
Click to expand...

Are you sure you didn't mean "double pole" instead of "double throw"?
Most SqD breakers are listed/rated for 2 wires. Look at the lug/terminal plate, if it is just a screw then it's only for a single wire, if it has a pressure plate then most likely is for 2 wires.
 
QO breakers 10-30 amps are all listed for use with two conductors. The listing is for two conductors 14-10 or one conductor 14-8.
 
onthwtr said:
Looked at a Square D 240V double throw QO 30 amp breaker with four wires. Anyone know if this is UL listed for double tap?
Panel was not marked so not sure what the load is. Suspect one was the A/C unit...
Click to expand...

Do you have a photo?

Welcome to the Forum. :)
 
onthwtr said:
Looked at a Square D 240V double throw QO 30 amp breaker with four wires. Anyone know if this is UL listed for double tap?
Panel was not marked so not sure what the load is. Suspect one was the A/C unit...
Click to expand...

Yes I meant double pole...
Photo attached
 

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onthwtr said:
Yes I meant double pole...
Photo attached
Click to expand...

As Don mentioned QO CB's are listed for two condcutors in the ranges that he provided. I would wonder why you would have two circuits connected to a single 2-pole 30 amp CB.
 
infinity said:
As Don mentioned QO CB's are listed for two condcutors in the ranges that he provided. I would wonder why you would have two circuits connected to a single 2-pole 30 amp CB.
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He only has one circuit connected. It splits into two directions as soon as it leaves the breaker though.
 
kwired said:
He only has one circuit connected. It splits into two directions as soon as it leaves the breaker though.
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True, but in what scenario would you have a 30 amp, 240 volt circuit splitting in two directions?
 
My other concern is that the wire does not appear to be #10 and the "red" appears to be white with red phase tape. So that makes me think this is a hack in which someone didn't have #10 and decided to run parallel 12-2 w/G NM. That would be a violation too.
 
Jraef said:
My other concern is that the wire does not appear to be #10 and the "red" appears to be white with red phase tape. So that makes me think this is a hack in which someone didn't have #10 and decided to run parallel 12-2 w/G NM. That would be a violation too.
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Cable wiring method with white "re-identified" is a compliant possibility. 12 AWG on 30 amp breaker is certainly possible with motors or air conditioning loads.
 
MAC702 said:
Violation or not, I've seen it many times when someone has wired a garage welding machine receptacle to share the clothes dryer circuit breaker. Saw it once with a sauna, too.
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I saw a home once with dryer and A/C unit sharing a 30A breaker. She always hung her clothes up in the summer time and used the dryer only on the winter.
 
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