Sizing wire and OCPD for HVAC/mini split systems

440.6(A)Exc 1 may be what yall’are looking for as far as MCA. And I agree, if nameplate states only max fuse size, that is what you are limited to by it’s listing and labeling.
 
kwired said:
Part V is for feeder short circuit/ground fault protection. I guess it depends on whether the question is about selecting conductor size or selecting overcurrent device? Without carefully reading through I can't recall but what little quick review I did I think I was assuming we were selecting the overcurrent device? A little of each going on throughout the thread.
Click to expand...
No, we were selecting conductor size in the OP
 
From a recent thread:

250A Breaker in Hospital Switchgear powering a 94A Chiller.

Im scratching my head on this one. I’m currently looking at a switchgear that has multiple larger breakers, as in 250A -800A. All have an indicator showing amp draw. They all read less than half of the breaker size and have the wire to match THAT amperage. The breaker I’m questioning mainly, is...
forums.mikeholt.com
 
You must log in or register to reply here.
Top