KD4UPL wrote:
I suppose it's possible he might have had Federal Pacific breakers before and now has something else installed. Federal Pacific breakers were very popular in the 70's and 80's until it was discovered they were faking the UL listing and printing their own labels. They got sued and went bankrupt. Their breakers sometimes didn't trip at all. If he used to have those and now has good breakers that might explain his comment.
Also an electrical contractor and I've done a lot of work on RV/mobilehome pedestals.
Most of the pedestals we see around here have Zinsco "long style" circuit breakers in them - also obsolete - not as trouble prone as Federal but not the best either. The available replacements are made by "UBI" and are really flaky, particularly with regard to how they connect to the buss.
Could explain the problem, although it has nothing to do with a change in codes.
