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mstr_elec, Electrical Technician
Category: Electrical
Satisfied Customers: 26
Experience:  30 years in the electrical and control industry
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I have a GE249RES120- Ballast I bought. It is "supposed" to

Customer Question

I have a GE249RES120-B Ballast I bought. It is "supposed" to be for 1 or 2 bulbs. I have only 1 bulb, but the ballast has extra wires for the other light. How does this work?
Submitted: 1 year ago.
Category: Electrical
Expert:  mstr_elec replied 1 year ago.

Hello, Can you confirm the make and model of the ballast?

If you look at the wiring diagram on the ballast, it will show both bulbs. Basically you wire one bulb as per the diagram and "cap" the other two wires with wirenuts individually. Do NOT tie those wires together! That should do it!

Customer: replied 1 year ago.
Thanks. I have 2 red, 2 blue and 2 yellow. Which ones should be capped?
Customer: replied 1 year ago.
Expert:  mstr_elec replied 1 year ago.

Using one bulb, you will need only 1 yellow On one end of the bulb, and one blue on the other end!

Cap the other Yellow

Cap one Blue

Cap both reds individually

Customer: replied 1 year ago.
I'll give it a whirl. So the red get capped. Okay.
Expert:  mstr_elec replied 1 year ago.

One moment, while I double check the model please

Expert:  mstr_elec replied 1 year ago.

How many wires are coming out from each end of the fixture, going to each end of the bulb?

Customer: replied 1 year ago.
There are two red on one end, white/blue on the other end.
Customer: replied 1 year ago.
that's the fixture that the actual ends plug into.
Customer: replied 1 year ago.
The original ballast had two red, one blue, one white and one black
Expert:  mstr_elec replied 1 year ago.

thanks for that information, one moment please.

Expert:  mstr_elec replied 1 year ago.

Thanks for waiting. Please try the following:

1. Connect each red from the ballast to the red wires of the fixture.

2. Connect one yellow to the blue, and the other yellow to the white of the fixture (bulbsockets)

3. Cap the blue wires individually ( you should not need them).

4. The black and white wire to the ballast should connect to the black and white power wires coming in

Please try that and let me know if it works properly.

Customer: replied 1 year ago.
it worked. thanks.
Expert:  mstr_elec replied 1 year ago.

Very welcome!

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