Today, I was looking at one of existing as-built drawing...
there is a electrical wiring diagram detail which shows one 277V
lighting circuit goes through a lighting contractor
(lighting contactor is controlled by a time clock)
then to the wall mounted occupancy sensor
and to the office lights that the occupancy sensor
controls.
I am wondering... why they had occupancy sensor downstream
of a lighting contactor/time clock?
there is a electrical wiring diagram detail which shows one 277V
lighting circuit goes through a lighting contractor
(lighting contactor is controlled by a time clock)
then to the wall mounted occupancy sensor
and to the office lights that the occupancy sensor
controls.
I am wondering... why they had occupancy sensor downstream
of a lighting contactor/time clock?