electure , i saw somewhere about the FPE breakers but it wasn't scneider. maybe it has chhanged hands again. LOL! a lot of heat from such a sorry breaker. i cut into a 20 amp circuit in a fpe sub panel supplied by a square d 100amp breaker. as you can proably guess the 100 amp tripped first.that was spooky. thought i was going to have to change my shorts! LOL!