4 Wire Diagram Ballast. Lower and cap one yellow and one purple or blue wire with a wire nut. Cap the wires with wire nuts.
The 2 yellow wires on a 4 lamp ballast are related collectively contained in the ballast. Open fixture and remove the bulb and ballast casing. Check ballast dimension key to ensure correct sizing.
2 lamp t12 fixture is rated out of 5 by rated 5 out of 5 by woody from replaced worn out original ballast.
Join the purple ballast wire to the third blue lampholder wire. There are two things which are going to be present in almost any 4 lamp t8 ballast wiring diagram. The ones designed for only 120 volts are different from the ones designed for 240 volts. Ballast bypass led wiring diagram 4 lamp led wiring diagram wiring diagram all.