nkalghatgi
Member
- Location
- Mechanicsburg, PA, USA
I have a 480/277 V panelboard. This panelboard feeds 277 single phase lighting circuits. It also feed a 277:120/240V transformer. This transformer feeds a 120/240V 12 circuit panelboard.
I have a roadway lighting contactor which I show connected after the 480/277V breakers.
From 120/240V panelboard, I have a 120V feed to a 3 way switch (auto, ON and OFF) which controls the photocell and timeclock (both are connected in parallel) which then control the contactor.
I have 3 lighting contactors for all the lighting circuits in the panelboard. I have to place the photocell on the first light pole. Can a single photocell control 3 contactors. How will my connections be ?
I dont want to feed the switch from 120/240V panelboard. Can I feed it directly from the transformer?
I have a roadway lighting contactor which I show connected after the 480/277V breakers.
From 120/240V panelboard, I have a 120V feed to a 3 way switch (auto, ON and OFF) which controls the photocell and timeclock (both are connected in parallel) which then control the contactor.
I have 3 lighting contactors for all the lighting circuits in the panelboard. I have to place the photocell on the first light pole. Can a single photocell control 3 contactors. How will my connections be ?
I dont want to feed the switch from 120/240V panelboard. Can I feed it directly from the transformer?