An air-conditioning unit is located on the roof of a commercial building. the dis-
connecting means for the equipment is:
a. permitted to be a switch capable of being locked in the open position and located
not in sight of the equipment.
b. required to be located within sight of the equipment and readily accessible from
the equipment.
c. required to be capable of being locked in the open position even when located
within sight of the equipment.
d. not permitted to be attached to the outside of the air-conditioning equipment.
e. not permitted to be installed within the air-conditioner enclosure.
code reference