I got some t5ho 4 bulb fluorescent fixtures with a 120/277v ballast. I want to wire them to 120v and don't want to mess up. The ballast has a Black, White, and Red/Gray wire coming out of it. Where does the red/gray wire hook to? Neutral or Hot? On the Ballast it says to hook it to "Neutral (or hot)" with just the black and white hooked up only 2 bulbs go on, I would guess that the red/gray goes to hot as well but I don't want to burn up the ballast.
120/277v t5 wiring
- Thread starter Jason641
- Start date
Charles (in GA)
Well-known member
Probably wires up like this one. The extra wire goes to the hot. Wire them both (black and red/gray) together, they all light up. Add a second switch (S2 in the pic) and you can turn on two bulbs using S1, or turn on all four by switching on both switches.
Charles
Charles
Last edited:
r_olson_06
Well-known member
Yes look at the ballast. Some a different than the one Charles showed. I have ran across a six lamp fixture that the red jumpered to the Grounded(White) of the incoming power. It should be self explanatory in the picture. And a good practice if your not sure is to try one first. That way if its wrong you only burn up one not all of them
If you are still in doubt post pics of the ballast wire diagram.
If you are still in doubt post pics of the ballast wire diagram.