Re: Challenger GFCI Breakers
There are some things that confuse the issues:
1. A lot of names have been changed.
2. A lot of manufacturers licensed the Cleveland Switchboard a.k.a. ITE a.k.a. Siemens design or just simply plaigarized it. This seemed to be an unwritten NEMA standard.
3. I had an instance where a 3-pole Westinghouse circuit breaker was not quite the right circuit breaker for a Westinghouse panel because the plastic opposite the busbar connection was a bit too narrow for the backplane hook. Some seemingly interchangeable circuit breakers are not really interchangeable.
On the other hand, the busbar connection for these plugin circuit breakers tends to burn up unless Ilsco Deox(R) is used on the busbar connection similar to SquareD Homeline. Actually, the grease that SquareD uses is the same thing except for the color of the dye that is added to it. I have had to clean up and grease the busbars in a few ITE plugin and Pushmatic panelboards in order control arcing or nuisance tripping problems respectively. The quality level seems to have gone up since Siemens bought ITE.
The only 2 makes of circuit breakers that I have liked are SquareD and General Electric. Everything else seems to have this problem or that problem because it is cheap.