Is anyone familiar with acceptable replacements for FPE
breakers other than a new breaker box? Also some FPE breaker
boxes were not sufficient. How much should an FPE breaker box
be derated (having heard of power busses in FPE boxes causing
fires)?

zxcvbob wrote:
But all circuit breakers *might* be switch duty, you don't know until
you look at the tiny label on them to see if they are SWD listed. Many
plain old breakers are SWD listed (or FLD).

Since the breakers in question are FPE's, I wouldn't use them as
switches anyway, but that's a diffrerent issue entirely.

Bob