How To Wire A 4 Lamp Ballast For 3 Lamps

After mounting the new ballast replace the ballast compartment cover and bulbs and it should be good for another 20 years.

How to wire a 4 lamp ballast for 3 lamps. The ballast has a hot and neutral wire at one end to receive power and two blue wires a red one. Connect each of the blue ballast wires to the each of the two blue lampholder wires. A 3 lamp parallel ballast can be replaced with a 4 lamp parallel ballast. Series ballasts can only be wired in series according to the diagram on the ballast.

Pin 2 of lamp 1 and pin 2 of lamp 2 go to the other yellow wire. Is this how you have it wired. It reveals the components of the circuit as streamlined forms and the power and also signal links in between the gadgets. Cut the wires to the ballast and remove the ballast.

With some 3 and 4 lamp series parallel ballasts if a single lamp in one branch fails the lamp s in the parallel branch will continue to operate. Photos 2 and 3 show how to remove the old ballast from the fluorescent light fixture. Wire the tombstones negative lead to the neutral end of the. A wiring diagram is a streamlined standard pictorial representation of an electric circuit.

The yellow wires are for lack of a better description are shared so pin 1 of lamp 1 and pin 1 of lamp 2 go one yellow wire. Confirm that the new ballast matches the old one photo below and then install it as shown in photo 4. If one lamp fails the others can keep operating as the circuit between them and the ballast remains unbroken. Connect the black and white wires from the house circuit cable to the black and white wires leading from the.

Connect the red ballast wire to the third blue lampholder wire. Notice how both the red and blue wires go to one lamp. The two yellow wires on a 4 lamp ballast are connected together inside the ballast. Cut and cap one yellow and one red or blue wire with a wire nut.

There are many types of ballasts but the simplest one is usually found in two tube light fixtures.