NEC 620.25 and 620.55 require branch circuits and disconnecting means for elevator utilization equipment. If a machine room is temperature controlled through a HVAC system, does a disconnect for the machine room HVAC system need to be within the elevator machine room?
Does this differ whether the temperature control is through a whole building system, slit system or a system dedicated to the machine room area?
Understandably, if the temperature control system is located on the elevator car, a disconnect would be required.
Brian J. Stockman