We have a project in which the condensing units are located in a closet that has only 22" clearance in from of the fused disconnect. I have (2) questions. First is the 30x36 always required in front of any overcurrent protection? Is there any exception? Second, in what instance do you need a fused disconnect vs non-fused or just a service switch?
Yes, if you already have a breaker that complies with the a/c installation instruction a simple disc. Sw. is all that would be required. Otherwise a fused disco would be redundant unless the breaker is larger than specified.110.26 (A) for you clearance
As far as fused disconnect, several things could apply. First does the condensing unit name plate depict fuse, circuit breaker or either.
Since these are in a closet indoors, is the circuit panel within sight of the equipment?
Yes, if you already have a breaker that complies with the a/c installation instruction a simple disc. Sw. is all that would be required. Otherwise a fused disco would be redundant unless the breaker is larger than specified.
Have we beat this this one up to death enough.
You would be surprised at how many individuals in the HVAC trade do not comprehend this or minimum circuit ampacity or maximum overload protection or what type is required,fused or circuit breaker.
