ballast question

[royce]

Hello all,
I have some 2 bulb t-8 fixtures with 277v ballasts that I need to power with 120v.
I also have some 120v 3 or 4 bulb ballasts.
So then my question is, will these 3 or 4 bulb ballasts work on a 2 bulb fixtures.
Thank you

 

[Mustang51js]

You can use the 3-4 bulb ballast but you can't use the 277 unless you have 277volts. The 120 ballasts you would just need to rewire based on the diagram on the ballast, you will just have some extra wires

 

[alfredeneuman]

You can use the 3 lamp ballasts for 2 lamps.

T8 3 lamp ballasts have 1 black, 1 white, 1 red, and 3 blue leads
Simply cap off one of the blue leads.

 

[royce]

thank you