Feeding exterior lights with 480V, single phase
Feeding exterior lights with 480V, single phase
(OP)
I am looking to install several 1000W exterior lights at our facility. I have been told by the vendor that I can supply any voltage that I want and he will select the ballast accordingly. All of the 277/480 lighting panels that are nearby are fully loaded, so I am looking at feeding the lights directly from a spare 480V, 3p breaker in a nearby MCC. Question #1: Is this a good idea???
If I do this, I would distribute the lights as evenly as possible on the three phases. I.e. connect three fixtures across phases 1 and 2, three fixtures across phases 2 and 3, and four fixtures across phases 1 and 3. Question #2: Is this the correct layout and/or am I doing something wrong here?
Thanks!!!!
If I do this, I would distribute the lights as evenly as possible on the three phases. I.e. connect three fixtures across phases 1 and 2, three fixtures across phases 2 and 3, and four fixtures across phases 1 and 3. Question #2: Is this the correct layout and/or am I doing something wrong here?
Thanks!!!!





RE: Feeding exterior lights with 480V, single phase
RE: Feeding exterior lights with 480V, single phase
RE: Feeding exterior lights with 480V, single phase
It sounds like a very good suggestion to make sure the fixture housings are grounded. I took a look at some of the manufacturer's other setups and I don't remember seeing a ground wire running to any of the fixtures themselves. I'm not sure exactly how to tie the ground in, with the ballast in the circuit.
gage
RE: Feeding exterior lights with 480V, single phase
It is always a good idea to have a ground rod for each pole coonected to the same ground lug. A local grounding rod is a supplement while, ground wire along with the circuit is a Code requirement.
RE: Feeding exterior lights with 480V, single phase