How do you wire a 3 lamp ballast?

How do you wire a 3 lamp 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.

What’s the difference between T8 and T12 ballast?

The main difference between T8 and T12 tubes is the tube’s diameter. T12 tubes are 1.5″ in diameter while T8s are just one inch. All other things—socket sizes, lengths, distance between pins—are the same. T8 LED tubes won’t fall out if you try to install them in a T12 fixture—they’ll fit just fine.

What are the three types of ballast?

Fluorescent ballasts use three different types of starting technologies: rapid, instant, and programmed.

What do the letters on a ballast mean?

The most common types are T12, T8, and T5. The T stands for tubular and the number indicates the diameter in 1/8 of an inch. Lamp diameter is determined by ballast type. A fixture with a T12 ballast must use a T12 bulb. A fixture with a T8 ballast must use a T8 bulb, etc.

Can I use a 2 lamp ballast for 3 lamps?

A 3 lamp fixture with two rapid start ballasts can be replaced with a 3 lamp instant start ballast. As seen below, connecting the 3 lamp instant start ballast to the three lamps can be a bit confusing. This is because the wire colors on the ballast and the lampholders will not match up.

Can I replace a T12 with a T8?

The easiest and lowest price option to replace a T12 is a T8 linear fluorescent. They have become the go-to option for pre-existing T12s. If you still have magnetic ballasts, switching to a T8 will require a ballast swap. Another option is to move forward with an LED retrofit.

Can I put T8 bulbs in a T12 fixture?

In terms of physical compatibility, both T8 and T12 lamps use the same G13 bi-pin base, so as long as they are the same length (e.g. 4-ft), a T8 lamp will physically fit inside a T12 fixture.

How do I know if a ballast is compatible?

You can determine whether you have a compatible fixture in seconds. 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.

What are the yellow wires for 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.

Can you use a 2 lamp ballast for 3 lamps?

Can I replace T12 with LED?

Can you actually retrofit T12 to LED without changing out the ballast? Actually, yes. But before you make a decision, there are other LED solutions to consider for a high-efficiency lighting option for existing T12s. A lot has changed in just a few years in the lighting industry.

Will a T12 ballast work with T8 LED bulbs?

Direct-wire compatible T8 LED tube lights can be used in a T12 fixture, as long as the T12 ballast is either bypassed, or completely removed.

What happens if you put a T8 bulb in a T12 ballast?

As far as safety is concerned, you can exchange them. If you place T12 tubes in a fixture with a T8 ballast, you will wear out the ballast and have to replace it. If you place T8 tubes in a fixture with a T12 ballast, then the tubes will have a shorter life due to a higher current through the tube.

How do I know what type of ballast I need?

When purchasing a ballast, you’ll need to read the type of lamps it’s designed for, how many lamps it operates, and the voltage the lamps will run on. Choosing the right ballast for a lamp will optimize the light output and life of the bulb.