At our local community theater, there are five 30a. Square D breakers which we use to switch on/off the marquee lights on the front of the building (neon tube transformers use a LOT of current). I can observe these breakers produce a small internal spark - I assume from the contacts separating. It seems reasonable that the same thing would happen (maybe greater) if a breaker trips under some type of fault condition.
In the subject discussion above, the answer would be...BOOM!!
Mike (mamills)
