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Old 07-08-2008, 11:26 PM   #1
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Double pole CH breaker ??


Hey all. I am replacing a double pole breaker in my panel, It's a Cutler Hammer ch 20 amp. By the breakers lugs there are stickers. By one lug it says common trip. And the other sticker by the other lug just has the breaker ratings. Would the common trip be the black wire in the 240 circuit? And why would there be a common trip side of the breaker shouldn't both legs be equally protected.

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Old 07-08-2008, 11:53 PM   #2
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Double pole CH breaker ??


The common trip probably means that if one pole of the breaker is overloaded it will trip both poles (which is required by code).


Last edited by Pudge565; 07-08-2008 at 11:54 PM. Reason: bad spelling
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Old 07-09-2008, 12:18 AM   #3
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Double pole CH breaker ??


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Would the common trip be the black wire in the 240 circuit? And why would there be a common trip side of the breaker shouldn't both legs be equally protected.
"Common trip" simply means that either breaker tripping will open both conductors, i.e. both "legs" via a handle that ties both handles together. Color has nothing to do with it! In a 240V circuit breaker, both poles are designed to open simultaneously. If not (i.e. if only one pole opened, the other would remain closed presenting a life and/or fire hazard).

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Old 07-09-2008, 12:59 AM   #4
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Double pole CH breaker ??


Ahh! Being it is a doublepole they trip simultaneously as needed in a mwbc. So by them saying common trip they mean both trip at once because of the handle ties. I thought maybe it had to do with which wire (Black, White) goes to a certain lug which did not make sense cause both sides of the breaker are identical. What threw me off was the word Common. Makes sense now. Thanks
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Old 07-09-2008, 03:18 PM   #5
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Double pole CH breaker ??


CH probably should not have placed the lable "common trip" next to one of the lugs.
When in doubt, you can always go to the web site and look at the specs.

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Old 07-09-2008, 10:28 PM   #6
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Double pole CH breaker ??


Or if you want to be a smart @$$ you caould take it that the breaker is going to trip alot.
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Old 07-09-2008, 10:39 PM   #7
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Or if you want to be a smart @$$ you caould take it that the breaker is going to trip alot.
Umm, ok, I don't get it?
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Old 07-09-2008, 11:41 PM   #8
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Double pole CH breaker ??


Meaning that it tripping would become very common.

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