Dumb breaker question

[DavidR8]

I have a few of these breakers.

https://www.homedepot.com/p/Square-...TL-Tandem-Circuit-Breaker-QOT1515CP/100076261

If the poles are tied together do they become a DP 15A


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[JohnKal]

No. It will remain a 120V breaker.

 

[DavidR8]

No. It will remain a 120V breaker.

So I won’t get 240v if I run a leg from each side?


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[Terry D]

No, it is a tandem breaker. It only contacts one leg in your panel. You can only get (2) 120 volt circuits out of it. You would need a two pole breaker, which contacts both legs

 

[wyliesdiesels]

So I won’t get 240v if I run a leg from each side?


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Flip he breaker over and look at the bus stabs.

There is only one stab.

240v requires 2 stabs.

 

[DavidR8]

No. It will remain a 120V breaker.

So I won’t get 240v if I run a leg from each side?


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[Jkcolo22]

I have a few of these breakers.

https://www.homedepot.com/p/Square-...TL-Tandem-Circuit-Breaker-QOT1515CP/100076261

If the poles are tied together do they become a DP 15A


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The answer is still no. You will need a double pole to get 240v.


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[DavidR8]

Sorry for the double post, not sure why that happened.
I get why you’re saying now. Thanks


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[Norcal]

So I won’t get 240v if I run a leg from each side?


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No, as others have already said, there a couple of obsolete makes, Crouse-Hinds, and Challenger, that would allow that to happen, plus can be done in GE panels with GE breakers, but SQ D HOM twin breakers do not allow 240V loads, as it is physically impossible for anything other then 120 volts, BTW those breakers can only be used in a SQ D Homeline panel, as they have not been UL classified to be used in competitive panels.

 

[Terry D]

No, as others have already said, there a couple of obsolete makes, Crouse-Hinds, and Challenger, that would allow that to happen, plus can be done in GE panels with GE breakers, but SQ D HOM twin breakers do not allow 240V loads, as it is physically impossible for anything other then 120 volts, BTW those breakers can only be used in a SQ D Homeline panel, as they have not been UL classified to be used in competitive panels.

The link shows a QO breaker, will only fit in a QO panel

 

[DavidR8]

The link shows a QO breaker, will only fit in a QO panel

That's the type of panel I have fortunately

 

[Norcal]

That's the type of panel I have fortunately

QO is not made in a quad version so that is not even a option for 240V.

 

[yatg]

You can put two QO tandems next to each other with a handle tie (QOTHT) for the inner pair. It'll be 240 but not common trip.

 

[DavidR8]

You can put two QO tandems next to each other with a handle tie (QOTHT) for the inner pair. It'll be 240 but not common trip.

Thanks, that’s what I was thinking about with my original question.
If the resulting 240v are connected to a single device, say a motor and the draw exceeds the 15A capacity would both sides trip?

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[Terry D]

Thanks, that’s what I was thinking about with my original question.
If the resulting 240v are connected to a single device, say a motor and the draw exceeds the 15A capacity would both sides trip?

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Looks like that would work, thought you meant if you could get 240 v out of that single tandem breaker. Yes both sides will trip. That is what the tie handle is for. A lot of breakers are not internally connected.

 

[DavidR8]

Looks like that would work, thought you meant if you could get 240 v out of that single tandem breaker. Yes both sides will trip. That is what the tie handle is for. A lot of breakers are not internally connected.

Thanks Terry, in fact that was the thinking behind my original question until it was pointed out that there’s only one connection to the bus.
I didn’t have a breaker handy or I would have figured that out. Eventually.


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[yatg]

Thanks, that’s what I was thinking about with my original question.
If the resulting 240v are connected to a single device, say a motor and the draw exceeds the 15A capacity would both sides trip?

From the QO catalog:
"Order two QOT1515 or QOT2020 circuit breakers and handle tie QOTHT for common switching of center two poles."

The handle tie only gives you a common disconnect vs. common trip. If one breaker trips the handle tie is not guaranteed to pull the other breaker off.

When I replaced my panel several years ago, I used regular size QO115 and QO120 breakers with handle ties for the MWBCs.