HVAC Disconnect
HVAC Disconnect
(OP)
I have an outdoor distribution panel providing power for several HVAC units. Provided this distribution panel is within line of sight of the HVAC units, can the branch circuit breakers (HACR type) serve as the disconnecting means & fulfill code requirements? Thanks for your help.






RE: HVAC Disconnect
The idea is safety, if you yourself were to work on that HVAC units electrical and you feel comfortable that no one will reclose the breaker while you are working on it then do so or else provide local disconnects on the HVAC units.
Besides, NEC OSHA or local inspector may have their safety interpretations or requirements.
RE: HVAC Disconnect
Locals inspectors know that and even if it's technically leagle I wouldn't try to get away with it.
RE: HVAC Disconnect
Hi there, just read NEC Art. 100 under "In Sight From (within sight from, within sight)" that section tells you specific about what is meant to have equipment "within sight" as well as the distance.
Regards
RE: HVAC Disconnect
The NEC does.
Don
RE: HVAC Disconnect
Great. Thank you for pointing this out.
I heard about 50 feet but was not sure it is so written. (Plus I did not need a Code to tell me that)
Thank you.
RE: HVAC Disconnect
RE: HVAC Disconnect
JRaef.com
Eng-Tips: Help for your job, not for your homework Read FAQ731-376
RE: HVAC Disconnect
But the locking devices for panelboard breakers often leave a lot to be be desired. Local disconnects for HVAC equipment seems to be the norm, even if not specifically required by NEC.
Also, rooftop units have special requirements.
RE: HVAC Disconnect
RE: HVAC Disconnect
Air-conditioning and refrigerating equipment requires a "within sight" disconnect per 440.14. There is an exception that permits a remote lockable disconnect, but only for industrial process cooling. If it is just ventilating equipment, then the rules in 430.102(B) apply, and unless you can comply with one of the exceptions, you need a local disconnect.
Don