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-   -   Double pole CH breaker ?? (http://www.diychatroom.com/f18/double-pole-ch-breaker-23395/)

James Con 07-08-2008 11:26 PM

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.

Pudge565 07-08-2008 11:53 PM

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

BigJimmy 07-09-2008 12:18 AM

Quote:

Originally Posted by James Con (Post 137360)
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).

Jimmy

James Con 07-09-2008 12:59 AM

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

fw2007 07-09-2008 03:18 PM

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.

FW

Pudge565 07-09-2008 10:28 PM

Or if you want to be a smart @$$ you caould take it that the breaker is going to trip alot. :jester::laughing::thumbup::whistling2:

BigJimmy 07-09-2008 10:39 PM

Quote:

Originally Posted by Pudge565 (Post 137699)
Or if you want to be a smart @$$ you caould take it that the breaker is going to trip alot. :jester::laughing::thumbup::whistling2:

Umm, ok, I don't get it?

Pudge565 07-09-2008 11:41 PM

Meaning that it tripping would become very common.


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