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How Do You Wire a 3 Wire Ballast?

FAQs Jackson Bowman July 19, 2022

How do I wire a 3 way 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. Connect the yellow ballast wire to the red lampholder wire.

How do you wire a 3 wire ballast for 2 lights?

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. Connect the yellow ballast wire to the red lampholder wire.

What are the color wires to ballast?

2 and 3 lamp instant start ballasts use blue wires for individual connections, and red wires for common connections. Black wire is for line voltage and white wire for neutral. An instant start ballast uses a single wire which connects from the ballast to each of the lamp terminals.

What do I do with the yellow wires on a ballast?

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.

What happens if you wire a ballast wrong?

If a ballast fails, it can cause a short, burn out tubes or even cause a fire, so it must be replaced. Lights that don’t turn on, fluorescent tubes blackened near their ends, and brown, burnt tube electrodes are all indicators that a ballast is bad.

How is a ballast wired?

Individual wires of one ballast connect to the one side of the fixture, individual wires from the other ballast connect to the other side of the fixture. The common wires of each ballast are connected to the other side of the fixture from each of the individual wires.

Which wire is hot on a ballast?

Generally, the hot wire on the ballast is black, and the neutral is white. The other colors are the wires that connect the ballast to the fluorescent tube holders and to each other.

How many wires are in a ballast?

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.

How do you install a light ballast?

What is the red wire on a ballast?

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

Does a ballast need to be grounded?

The fixture or ballast does not have to be grounded through an equipment ground to operate. Yes, the ballast case has to be electrically connected to the sheet metal behind the lamps for them to ignite.

How do you ground a fluorescent light ballast?

If the ballast doesn’t have a ground wire or terminal the ballast is just grounded to the fixture housing by it’s mounting screws. The ground wire on the cord usually attaches to a designated (green) screw on the fixture frame.

How do I know if my ballast is magnetic or electronic?

Simply turn the light on, then take a photo of the fixture using your smartphone or digital camera. If there are no dark bands on the resulting image, you have an electronic ballast that will work with direct drop-in LED tubes.

How do you hook up a t12 ballast?

Simply turn the light on, then take a photo of the fixture using your smartphone or digital camera. If there are no dark bands on the resulting image, you have an electronic ballast that will work with direct drop-in LED tubes.

How do you rewire an LED ballast?

Simply turn the light on, then take a photo of the fixture using your smartphone or digital camera. If there are no dark bands on the resulting image, you have an electronic ballast that will work with direct drop-in LED tubes.

References:

  1. https://www.electrical101.com/replace-3lamp-parallel-ballast.html
  2. https://www.youtube.com/watch?v=HK2E4KbcxZE
  3. https://www.electrical101.com/parallel-ballast-wiring.html
  4. https://www.electrical101.com/fluorescent-lampholder-wiring.html
  5. https://homeguides.sfgate.com/rewire-electric-ballast-33046.html
  6. https://www.electrical101.com/series-ballast-diagrams.html
  7. https://www.naturalhandyman.com/qa/qalighting.html
  8. https://inspectapedia.com/electric/Fluorescent-light-ballast-replacement.php
  9. https://www.thespruce.com/ballast-gone-ballistic-1152461
  10. https://homeguides.sfgate.com/wire-twowire-ballast-66276.html
  11. https://forums.mikeholt.com/threads/ballast-replacement-and-grounding.5078/
  12. https://diy.stackexchange.com/questions/189259/advice-on-grounding-lamp-and-ballast-required
  13. https://www.eledlights.com/blog/post/quick-way-to-tell-which-ballast-you-have/
  14. https://www.youtube.com/watch?v=lNnnNl4YoFY
  15. https://www.youtube.com/watch?v=wqU3nuxc5w8

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