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Breaker Interchange

22K views 21 replies 8 participants last post by  user4818 
#1 ·
Breaker interchangeability - I really need to study up on the stuff. Today, on a service call, I added a 20 amp Siemens S.P. breaker to a Murray panel. Is that a listed interchange?​
 
#10 ·
Well technically, Siemens and Murray are not interchangeable despite being absolutely identical. I still interchange them anyway.

Now, if we are talking about mixing and matching other brands, that is just plain hack.
Yes they are..


Murray and Siemens are the same.


Murray = Chevy

Seimens =Cadillac
 
#15 ·
Every once in a while you'll get Seimens breakers in Murray packages, and vice-versa. More and more, I favor carrying a classified-replacement breaker on the truck (generally from CH), rather than carrying so many odd brands for service calls. If I'm doing a project where I KNOW I'll be using a bunch of a certain brand, I'll buy that brand particular for that panel. For service work, I just use a type CL breaker, unless I happen to have the right one kicking around on the truck.
 
#17 ·
Like Marc said, I only carry three types of breaker generally. Cutler Hammer CH, Square D QO, and Cutler Hammer CL.

If I'm doing a remodel or new work I'll get the brand breakers, but there is no reason to not have a case or two of the CL breakers on board.
 
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