Can a Cutler Hammer "type BR type C" breaker be used in a Challenger "type A,C" panel?
I think I remember an NEC article that says replacement breakers must be same type, but I cannot find it in my 2011.
Wow, there is a lot of discussion / confusion about this, on this forum and others.
I know years ago I read an article, (UL whitesheet I think) that clearly said breaker type designation shall match the panel nameplate.
Experience has shown this to be true; every time I saw an arc damaged breaker / bussbar the breaker was not a type spec'd on nameplate. The only exceptions were Zinsco breakers.
As far as I can tell (but good info is hard to find):
"Interchangeable" means breaker will fit many panels, but connection to buss can have subtle differences. (Sometimes resulting in arcing).
"listed" means breaker type matches panel nameplate.
"Classified" means UL approved a breaker made by company A for a panel made by B. A classified breaker type will not match nameplate but printed with panels that it is approved for. The panel warranty is not voided per Magnuson?Moss warranty act.
The "CL" line is the listed breakers that are allowed for certain replacements. The "CH" is just the other brand/type that Eaton/Cutler-Hammer makes that is only for the CH panels.
People often confuse the CH with CL. I think CL stands for classified, and is what can be used in various brands of panels. CH is just the other line of panel besides the BR that Eaton makes.
CH is like Square D's QO. They will only fit in each panel respectively.
The letter from UL to Eaton shows the BR as being a replacement for the Challenger type C, for whatever reason the CL is no ton the list. I am not an expert on alternative breakers, I will look up the CL.