Fluorescent tube lighting fixtures use a ballast to control the amount of current that is sent through the lighting tube. The ballast also gives the initial surge of power to begin the arc release within the tubes. The type of ballast required to get a mild is dependent on the amount of tubes within the fixture. If you have to wire a 3 lamp ballast on a fluorescent fixture, then you can link the new ballast and possess the fixture running within a few minutes.
Switch off the circuit breaker that controls the fluorescent lighting’s circuit at the breaker panel. Remove the light switch cover for your fluorescent lighting’s switch with a screwdriver, and then hold the tip of a noncontact electrical ripped against the wires on the face of the switch. When the light illuminates, there is still power to the circuit. Turn off more the primary breaker to the house until the tester’s mild no more illuminates. Replace the switch cap.
Remove the lens diffuser if your fluorescent fixture is so equipped. Rotate and remove all the fluorescent lights in the lighting fixture. Then loosen the screws, and remove the panel cover exposing the ballast and wiring.
Loosen all the cable nuts connecting the ballast into the lighting fixture receptacles. When the receptacles are hard-wired, snip each one of the wires in a few inches of the entire body of this ballast with a set of cable cutters.
Loosen the nuts that hold the ballast into the body of this lighting fixture with a nut driver. And eliminate the ballast. Slip a new ballast into the frame, and tighten the nuts to hold it in position.
Strip 1/2 inch of insulation from the tip of each one of these wires, both within the fixture and about the ballast.
Twist all the red wires from the receptacles together, and wrap them around the red cable from the ballast. Combine the ends with a wire nut. Then repeat the process, connecting all the blue wires together, followed by the two white wires along with the two black wires. Wrap a few rounds of electric tape around each cable nut along with the connected wires.
Replace the panel cover, then insert the fluorescent tubes into the receptacles and twist the tubes until they snap into position. Reinsert the lens diffuser if your lighting is equipped with one before turning to the power to the circuit and testing the fixture.