I have lighting circuit that has 13 -2x4 fixtures on it . The first fixture is 180 feet from the panel. Then there is 8 feet between each fixture. I'am sharing a nuetral for two circuits. The service is 3phase 208v. That would make it about 280 feet to the last fixture. I used the voltage drop calculator with the worst case scenario 10.5 amps at the end and it came to 8 wire. I believe that if i knew how to calculate at each fixture that 10 wire might make it. ??
voltage drop
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You could figure it 'point to point' dropping the load of one fixture each time. Is there a job spec you are trying to meet?
That said, I would run 10 AWG as the home run, use 12 AWG from fixture to fixture and feel great about it.
If I had a spec to meet I might even break it up into two circuits just to avoid wiring 2 x 4 drop ins with 8 or 10 AWG, that would be a real pain.
That said, I would run 10 AWG as the home run, use 12 AWG from fixture to fixture and feel great about it.
If I had a spec to meet I might even break it up into two circuits just to avoid wiring 2 x 4 drop ins with 8 or 10 AWG, that would be a real pain.
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