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Circuit breaker addition

zendriver

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Dec 10, 2014
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Indiana
Only had this a couple years, but this as a Siemens load center in the garage

Trying to figure out the proper style of breaker to put in it want to add a couple of 20 amp for now

Thanks

IMG_1473.jpeg
 
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zendriver

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Dec 10, 2014
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So, Siemens QP will be ok for other sizes as well?

I’ll probably add for a bigger air compressor later.
 

mike93lx

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Dec 9, 2013
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Richmond, VA
Yes, QP is the right style if you don't need gfci or afci in the breaker.

The "branch breaker" column is what you want to look at
 
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sparky 1971

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Norcal

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bronc076

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Jul 17, 2023
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Ozarks
It's frustrating that some panels/ breaker combinations that physically fit are not approved, no doubt due to lack of testing and certification. I get it, it's all about safety. Maybe a square D breaker does not apply the proper clamping force on a Siemens bus, who knows why some are approved and some are not, it depends on vendor testing. Maybe it's politics or business! It would be nice if there was body like NIST or IEEE that developed standards for manufactures to follow, or at least comply with. It would be a lot easier to figure out what worked where. For now we just need to read the label on the panel, and who has time to read these days! :)
 

sparky 1971

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Oct 9, 2018
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It's frustrating that some panels/ breaker combinations that physically fit are not approved, no doubt due to lack of testing and certification. I get it, it's all about safety. Maybe a square D breaker does not apply the proper clamping force on a Siemens bus, who knows why some are approved and some are not, it depends on vendor testing. Maybe it's politics or business! It would be nice if there was body like NIST or IEEE that developed standards for manufactures to follow, or at least comply with. It would be a lot easier to figure out what worked where. For now we just need to read the label on the panel, and who has time to read these days! :)
I don't remember what it was about but I know it wasn't breakers when I asked an inspector why I couldn't do something using a product that I thought would be better for the application. (I was looking for permission, there wasn't a failed inspection) He agreed but said because it's not listed. I asked why and the response was that the manufacturer has to pay to get a listing and then pay a fee for every listing for every product sold. Square D would have to pay for a listing to replace Siemens, then pay for at least two listings on every breaker sold. I don't think there is a darn thing different, design wise, between an Eaton BR and a CL, but they only have to pay for the extra listings on CL sales while they only pay for the BR listing with BR breakers. That whole thing might be rubbish, but it makes sense to me.

Now I'm gonna be up all night trying to remember what I wanted to do.
 

Norcal

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Joined
Mar 16, 2008
Messages
13,775
It's frustrating that some panels/ breaker combinations that physically fit are not approved, no doubt due to lack of testing and certification. I get it, it's all about safety. Maybe a square D breaker does not apply the proper clamping force on a Siemens bus, who knows why some are approved and some are not, it depends on vendor testing. Maybe it's politics or business! It would be nice if there was body like NIST or IEEE that developed standards for manufactures to follow, or at least comply with. It would be a lot easier to figure out what worked where. For now we just need to read the label on the panel, and who has time to read these days! :)
SQ D /Schneider states that only SQ D breakers should be used in their panels & they would be hypocrites if they were to have breakers classified for competitive makes of panels.
 
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