Circuit Breakers Used as Switches
Circuit Breakers Used as Switches
(OP)
Can a larger circuit breaker be used as a switch on a fused circuit sized for a lower current?
i.e. a 70A breaker used as a switch on a circuit fused and sized for 40A
i.e. a 70A breaker used as a switch on a circuit fused and sized for 40A






RE: Circuit Breakers Used as Switches
RE: Circuit Breakers Used as Switches
I await enlightenment from one our "code lawyers".
RE: Circuit Breakers Used as Switches
A Molded Case Circuit Breaker (MCCB) would need to be labeled "SWD" for switching duty I believe, but as far as I know, almost all new MCCBs are now labeled as such. But the term "circuit breaker" is a little nebulous now with the advent of what are called "Mini Circuit Breakers" or MCB from IEC countries. I do not believe they are going to be labeled to be used as switches.
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RE: Circuit Breakers Used as Switches
Keith Cress
kcress - http://www.flaminsystems.com