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Old 03-14-2010, 03:09 AM   #1
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Identify circuit breaker


Hi,

I'm in a house that is more than 50 years old, and the electrical panel says Square-D. One of the 20 amp single pole circuit breaker handle broke, and I took it out, and it has no markings, no manufacturer nor part number on it. The panel is nearly 4" in length. I went to Orchard Supply Hardware, Lowes and Home Depot and they all said they have nothing like it. Might be an obsolete thing.

Can anyone help identify it? Anyone know where I can find a replacement?

If I can't find a replacement, what can I do? I sure hope I don't have to replace the entire panel.

Thanks a lot.
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Old 03-14-2010, 08:49 AM   #2
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Identify circuit breaker


That's an X-O breaker. The buss bars are round -- they look like copper water pipes. You can orient the breaker on the right side, or the left, depending on which leg of the panel you want to connect to.

Here is one place to start looking for these. Be warned, they ain't cheap.

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Old 03-14-2010, 10:15 AM   #3
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Identify circuit breaker


If you have a Square D panel you should be installing Square D breakers

Was this breaker installed in the Square D panel ?
Or a sub-panel ?
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Old 03-14-2010, 10:38 AM   #4
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Identify circuit breaker


An X-O is a Square D breaker.
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Old 03-14-2010, 01:07 PM   #5
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Identify circuit breaker


Quote:
Originally Posted by brric View Post
An X-O is a Square D breaker.
Mostly true, however Square D sold the line to Cutler-Hammer when they developed a newer style of breaker line.

Some XO breakers have the Cutler-Hammer label on them because of this.
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Old 03-14-2010, 07:12 PM   #6
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Identify circuit breaker


We have a good source for recycled and/or obscure breakers here in Portland. I don't know if they do mail order but the link is

http://oregonbreaker.com/

BTW, I'm not affiliated with them in any way except that my shop buys from them when we need an oddball breaker.
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Old 03-16-2010, 12:11 AM   #7
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Identify circuit breaker


Thank you so much for the helping me to identify it. Checking google does confirm that it looks like the XO120. But, oh boy, are they expensive for used ones, but I guess that can't be helped since they are now obsolete.

The bus bars are actually two flat bars, about .5in wide (didn't really measure it).

Thanks so much everyone.

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