How to Wire a Fluorescent Light Ballast

Replacing the ballast in a fluorescent fixture is a project that can be done at home. The ballast is the part of the florescent light that generates the current needed to start the light. The indicators of a bad ballast include a buzzing or humming sound coming from the fixture. Additionally, flickering or a strobing effect are also signs of a bad ballast.

Things You'll Need

• New florescent ballast
• Screwdriver
• Wire caps
• Wire strippers

Instructions

1. Remove the old bulbs and place them in a safe location. Florescent lamps contain mercury so be careful not to drop or crack them.

2. Disconnect the power to the fixture. Either unplug it or find the correct breaker to disconnect the power.

3. Locate the metal tabs or screws on the fixture that hold the panel in place. After removing these screws, you should see a black box with wires coming out of it. This is the ballast.

4. Cut the wires and unscrew the old ballast. Next, strip the wires and twist the ends together.

5. Screw in the new ballast and strip the wires on the new ballast.

6. Match up the color coded wires and reconnect the wires using the yellow wire caps to cover the bare wire ends. Then, reattach the panel.

7. Install the bulbs and reconnect the electricity. The new ballast will provide clean light and will not produce a buzzing or humming noise.

Tips & Warnings

• Try to buy a ballast that matches the brand of your fixture.

• Fluorescent lamps contain mercury, so do not drop them. Electricity can kill you, so disconnect the fixture before servicing.

Resources

• GE Ballasts