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Thread: Are Challenger and SQ-D QO Breakers Interchangeable?

  1. #1

    Question Are Challenger and SQ-D QO Breakers Interchangeable?

    Does anyone have any information on, or know if Challenger and Square-D QO type circuit breakers are interchangeable? They look very similar.
    Thanks

  2. #2
    Join Date
    Jul 2007
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    Do you mean Square D Homeline? QO has a totally different stab.

  3. #3
    Join Date
    May 2003
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    713
    Quote Originally Posted by David40 View Post
    Does anyone have any information on, or know if Challenger and Square-D QO type circuit breakers are interchangeable? They look very similar.
    Thanks
    The only breakers that interchange w/ QO are Cutler-Hammer & Siemens UL classified QO replacements, if someone is a hack they can FUBAR a Cutler-Hammer type CH breaker into a QO loadcenter, since they are the same width & clip on the bus stab in the same way but clip onto the panel interior differently.

    A Challenger or a SQ D HO line are 1" in width compared to a QO is 3/4", which makes it impossible to interchange them.

  4. #4
    Now that I think of it I think it is Cutler-Hammer not Challenger. I have a ton of the QO laying around and I'd like to use them up instead of having to buy a new Cutler-Hammer breaker on those rare occasions where I run into a Cutler-Hammer panel. Is it easier to get a QO into a Cutler-Hammer panel than the other way around?

  5. #5
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    Apr 2007
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    Quote Originally Posted by David40 View Post
    Now that I think of it I think it is Cutler-Hammer not Challenger. I have a ton of the QO laying around and I'd like to use them up instead of having to buy a new Cutler-Hammer breaker on those rare occasions where I run into a Cutler-Hammer panel. Is it easier to get a QO into a Cutler-Hammer panel than the other way around?
    Cutler Hammer has CH and BR both are different in the way they mount.
    A Challenger is a BR style breaker
    The more I learn the less I seem to know....

  6. #6
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    Quote Originally Posted by David40 View Post
    Now that I think of it I think it is Cutler-Hammer not Challenger. I have a ton of the QO laying around and I'd like to use them up instead of having to buy a new Cutler-Hammer breaker on those rare occasions where I run into a Cutler-Hammer panel. Is it easier to get a QO into a Cutler-Hammer panel than the other way around?
    You will regret it.

  7. #7
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    Quote Originally Posted by David40 View Post
    Now that I think of it I think it is Cutler-Hammer not Challenger. I have a ton of the QO laying around and I'd like to use them up instead of having to buy a new Cutler-Hammer breaker on those rare occasions where I run into a Cutler-Hammer panel. Is it easier to get a QO into a Cutler-Hammer panel than the other way around?
    Cutler-Hammer has 'classified' breakers that have been UL tested and 'classified' to be put into a SQ D QO panel...however, I know of no such classification for SQ D breakers being classified to put into other mfr's panels.

  8. #8
    Join Date
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    The manufacturer of the breaker says do not do it. Square D does not 'approve' of having any of their breakers installed into any other manufacturer's panels.
    Just because you can, doesn't mean you should.

  9. #9

    Smile

    Thanks for all the replies.

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