This was very helpful to me. Everything was just as you said except I can't undo the old ballast's wires (red, yellow and blue pairs) from the tube holders. I don't want to yank them apart and break something. What's the trick here? rdelion AT telus.net
We recently changed a ballast in my art studio...and need to do another one for that matter. The fixture is over 20 years old. When my husband removed the old heavy black box style ballast, it had model numbers that we were able to match at Home Depot. Hope this helps. Marilyn
Ballasts normally have a black/white side and a color side. The black and white wires are connected to the power wires coming from the switch. The colored wires get connected to the tube holders. The colors are normally (for a two tube fixture) yellow yellow red blue The red and the blue go to the left ends, and the yellow wires go to the right ends of the tubes. Sometimes, if the four wires are all the same color, then they are of different lengths. In that case treat the longer ones as if they were yellow, and the shorter ones as if they were red and blue.
The incoming power wires on the black and white end of the ballast are always black and white. That's required by code.
red -----oooooooooooooooooo-----yellow blue-----oooooooooooooooooo-----yellow
Login using the form on the top of the page to post feedback (if you are a registered user). If you have not yet registered, click here to do so. It's FREE!.
