What are the red and blue wires on a ballast?
The ballast has a hot and neutral wire at one end to receive power, and two blue wires a red one at the other end to supply power to the lights.
Can you wire a 4 lamp ballast for 2 lamps?
Many replacement ballasts can be connected to more than one combination of lamps so that a 4 lamp ballast can be connected to a 3 or 2 lamp ballast. This is indicated directly on the label and on the wiring diagram.
How many ballast are in a 4 bulb fluorescent light?
A 4 lamp fixture with two rapid start ballasts can be replaced with one 4 lamp instant start ballast. As seen below, connecting the 4 lamp instant start ballast to the four lamps can be a bit confusing.
Can you wire a ballast wrong?
Replacement ballast should always match in voltage, wattage and brand. Wrong ballast types can cause fires or shorts.
Does a ballast need to be grounded?
Registered. Actually, the ballast is what needs a ground.
How many wires does a ballast have?
Wires on the Replacement Ballast / Transformer
The replacement ballast provides 5 wires: black, white, blue, blue (equivalent) and red. Incoming electrical power at the fixture connects to the line BLACK and WHITE wires shown on the diagram.
What are the yellow wires in a ballast?
The other individual red wires connect from the ballast to push-in connectors on each side of the left holder of lamp 2. The common yellow wires connect from the ballast to push-in connectors on one of the right holders of lamp 1 or 2. Two yellow wires connect the common lampholders together.
How do you wire a 4 lamp ballast for a 3 lamp?
The two yellow wires on a 4 lamp instant start ballast are connected together inside the ballast.
- Cut and cap one yellow and one red or blue wire with a wire nut.
- Connect each of the blue ballast wires to the each of the two blue lampholder wires.
- Connect the red ballast wire to the third blue lampholder wire.
Can you use a 2 lamp ballast for 1 lamp?
A 1 lamp rapid start (series) ballast can be hard to find, but it can be replaced with a 2 lamp instant start (parallel) ballast.