Have a new warehouse that im using some LED high bays in. Im hitting a small 30 kVA step-up transformer to take the voltage from 120 to 277 to serve these lights. Im putting (12) on a circuit and they are 241 watts each which comes to 2892 watts / circuit or 10.4 amps. On a #12 wire running 400 feet im getting around a 6% voltage drop depending on the power factor I use.
The local energy code limits the voltage drop but I cant remember what it is for branch circuits so this may be a non-issue.
My question is, how will these lights respond to a 6% VD? I can easily go to a #10 wire but it seems like that would quickly eat away at the savings for the LED lights and extend the payback period. I would also prefer not to add another circuit due to the preferred switching arrangement and cost of another run from electric room.
Side question, what is a good power factor to use for LED lighting?
Thanks and Happy Sunday.
The local energy code limits the voltage drop but I cant remember what it is for branch circuits so this may be a non-issue.
My question is, how will these lights respond to a 6% VD? I can easily go to a #10 wire but it seems like that would quickly eat away at the savings for the LED lights and extend the payback period. I would also prefer not to add another circuit due to the preferred switching arrangement and cost of another run from electric room.
Side question, what is a good power factor to use for LED lighting?
Thanks and Happy Sunday.