When your fluorescent light flickers or makes a loud and annoying hum, a degrading ballast is the cause. Pay close attention to what groves of the tombstone are in the slots on the bar. Connect the wires by matching ground wires and black wires and twisting them together. The type of existing lamps, the following are some examples. Install the ballast cover in the reverse of how you removed it. Follow the wiring diagram that came with your new ballast. When posing the question can a t8 light work on a t12 ballast… When considering a ballast for your lamp, make sure they have corresponding ANSI (American National Standards Institute) codes. In general, T8 use electronic ballasts while T12 use magnetic ballasts. How do I wire the new ballast into the fixture. Then, use a nut driver to unscrew the nut holding the ballast in place and install the replacement ballast. The following must be identified to select the correct Energy Efficient Electronic T8 Ballast to replace a T12 Magnetic Ballast: The circuit voltage. Each side of the fixture has 4 Blub plugs AKA "tombstone connectors" 8 in total. Remove The Ballast Now, you must take out the ballast by unscrewing it. Converting a Fixture from a T12 Ballast to a T8 Ballast. Replacing two T12 fluorescent light fixture magnetic ballasts with one t8 electronic ballast. I want to replace a Magnetic Ballast MB2x40/120 RS with a QTP 2x32T8/UNV ISN-SC. I love the Quote "If you can’t open it, you don’t own it", How to Make Charcuterie Boards Using Clear Acrylic Templates. Shunted Versus Non-Shunted Tombstone (Socket) But before you begin replacing the bulb you are going to need to look over your budget and find out what is … Learn How to Replace a Fluorescent Light Ballast. We only recommend a ballast-bypass using double-ended LED tubes. Place each side of the metal bar holding the tombstones into its slots and be sure to pry the tab on the other side that holds it in place. Start here by removing each tombstone from slots on the metal bar. Install a direct wire or ballast-bypass linear LED lamp. Remove the fluorescent ... Photo 2: Cut the old ballast wiring. 2-Lamp Rapid Start to. If the new electronic ballast's footprint is a different size than the magnetic ballast, drive a self-tapping metal screw through the body of the fixture to hold the ballast in place. It is for a 2 bulb T12 or T8 fixture. Photo 1: Remove the bulbs and fluorescent light fixture cover. Remove the wire nuts from the black and white wires connecting the ballast to the electrical circuit. From T12 to T5 you will need to change the ballast and the lamp holders. Before wiring to the ballast all of the 8 tombstones get a jumper wire to connect one side to the other so you could do that a head of time or as you go. T8 fixtures typically have three lamps, one electronic ballast for 82-86 input watts. How To Replace 2 Lamp Rapid Start Ballast With Instant Electrical 101. I found that two of the old tombstone connectors were cracked so I will show how I replaced them also. 1 year ago Replace 3 Lamp Instant Start Ballast with 4 Lamp Instant Start. A few light taps on the staple with the flat side of some pliers is all it should take to reinstall it. If you can change out a light switch or outlet you can definitely replace an old ballast that doesn’t work. Jan 10, I've wired hundreds of ballasts before but haven't had to change Change http:// wiringall.com I've done 's of them. All done with only 7 more to go. ), base type, and wattage are usually the most helpful information. The diameter for the T12 is 38mm and 25mm for the T8. The ballast has 4 blue wires two red and two yellow and then the white and black and ground wires. In this example, a fixture with a 3 lamp instant start ballast is replaced with a 4 lamp instant start ballast. Premature ballast failure is often caused by the surrounding environment. Right now, a ballast-bypass is our top LED replacement option for T12 fluorescent tubes. A replacement ballast costs about $10-25 depending on capacity and brand. The old ballast had two blue and two red wires on the right, and on the left side: a black, a white, one red, one blue and one yellow. Notes: This is applicable for 2-lamp T12 rapid start to a 2-lamp electronic T8.I am changing an old GE magnetic ballast in a T12, 8FT. The following must be identified to select the correct Energy Efficient Electronic T8 Ballast to replace a T12 Magnetic Ballast: The circuit voltage. keep in mind that the two red wire tombstones must connect to the tombstones that you connected the one yellow wire to. Nonetheless, if the existing fixture offers a shunted tombstone, you should replace it with a non-shunted variant. It reveals the components of the circuit as streamlined shapes, and also the power and also signal connections between the devices. Heat and moisture are enemies #1 and #2 to your ballast. I'm changing the bulbs too from T12's to T8's. Includes a cameo appearance from Baxter. How To Replace A T12 Ballast With A Advance Reb2p32n. Pull the ballast free. I looked at the T8 ballasts and T12, and they both just convert 120v to 277v. Pay close attention to the wiring diagram on the ballast as the new electronic T8 ballast are wired quite differently from the old magnetic T Retrofit Wiring Diagrams. read more. I am changing an old GE magnetic ballast in a T12, 8FT. To purchase a new 300mm led tube replacement see our fluorescent tubes section. If you place T12 tubes in a fixture with a T8 ballast, you will wear out the ballast and have to replace it much sooner than normal. - Disconnect power to lighting fixture prior to servicing the fixture.  Not only are they brighter per watt, they also last longer than even the preferred florescent bulbs. If an old T12 lamp magnetic ballast is replaced with a newer T8 lamp and electronic ballast, the colors will probably not match. Remove the ballast from the Remove the nut securing the old ballast in the light's housing, using a nut driver. Railroad Rail Lantern / Sign Stand Split With Axe. The letter ‘F’ stands for fluorescent and the number that follows is the power in watts or the length in inches if the lamp is very long.The letter ‘T’ means that the bulb is a tubular shape. To replace, remove the old tube and bring it to the hardware store. Click to see full answer. A typical application operates lights for 4,000 hours per year. T8's are smaller, more efficient and produce more light - often three T8s can replace four T12s. on Introduction, How to wire the T12 ballast to the older 8 ft 2/ single pin bulb fixture, About: I have been a full time bicycle mechanic for the past 15 years. Going from T12 to T8, just replace the ballast. Retrofit Wiring Diagrams Notes: This is applicable for 4-lamp T12 rapid start fixture with two 2-Lamp ballasts to retrofit to one 4-lamp electronic T8 instant start system. Replace the ballast when your fluorescent light flickers or makes an annoying hum. T12 Ballast Wiring Diagram. This should free up the carboard backing to be removed and reveal the contact tabs inside. Opening the fixture and examining the ballast will give you the ultimate answer as to what type of ballast you have; but, in general, the older the fixture, the more likely it is to have a magnetic ballast. Yellow wire to, but is not electrically compatible ANSI ( American National Standards )... 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