How many ballasts in a two tube fixture?

Can a two tube fluorescent fixture be wired to have only one tube?

Yes, a two-tube fluorescent fixture can be wired to have only one tube. You would need to disconnect the ballast and sockets for the tube you are removing, and then rewire the remaining tube to the power source. Make sure to follow proper safety procedures and consult an electrician if needed.

What are the different types of fluorescent ballasts available in the market?

There are two main types of fluorescent ballasts available in the market: magnetic ballasts and electronic ballasts. Magnetic ballasts are traditional and less efficient, while electronic ballasts are newer and more energy-efficient.

What is the output of a light ballast?

Fluorescent electronic ballasts have a voltage to amperage ratio chart on their face. Use this chart by selecting the voltage you are using and the corresponding amperage, then multiply the two numbers together for your wattage. Some fixtures come with more than one ballast, so you will need to take the wattage of all applicable ballasts for any given fixture to obtain the total wattage for the fixture.

How do you wire multiple ballasts to one switch?

Answer for USA, Canada and countries running a 60 Hz supply service.The ballasts have to be connected in parallel with each other. Bring a "hot" circuit wire from the distribution panel breaker to the junction box that is going to hold the switch. This connection will be for 120 volt ballasts but will be the same for any "hot" to neutral voltages.Connect the "hot" wire to the top screw in the switch.Run a two conductor cable to the first fixture junction box.Connect the black wire of this cable to the bottom screw of the switch.Wire nut the two white wires together and push them to the back of the switch's junction box.Connect the ground wire around the ground screw in the back of the box and wire nut the two ground wires together.From the first fixture junction box to as many junction boxes there are, for how many fixture ballasts you want to connect together, install a two wire cable between them. From the first box to the last fixture box, the connections will be black to black and white to white. This also includes the ballast black and white wires.Connect the ground wires in all fixture boxes as instructed to do in the first switch box.Pigtail a two foot piece of insulated green wire on the ground wire, in the fixture's junction box, where the two grounds splice together. This is to ground the fixture when it is installed.Install the switch in the switch box and install the cover plate.Turn on the breaker to energize the system.All of the fixtures will operate when the switch is flipped on.As always, if you are in doubt about what to do, the best advice anyone should give you is to call a licensed electrician to advise what work is needed.Before you do any work yourself,on electrical circuits, equipment or appliances,always use a test meter to ensure the circuit is, in fact, de-energized.IF YOU ARE NOT ALREADY SURE YOU CAN DO THIS JOBSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.

Can I wire two ballasts together and use one power cable Do both ballasts have to be earthed if they are connected?

Yes, the two ballasts can be supplied with one power source. The two ballasts will be paralleled together. This means supply black (hot) to black on ballast one and black on ballast number two. Tie all three under a single wire nut. Connect the neutral conductors all together under one wire nut. Both ballasts should be tied to the ground wire that is in the supply cable. All of these connections must be made in an approved junction box.

How do you wire a ballast that has two black wires for a one tube fluorescent lamp?

There should be a black & white wire coming from the light. Hook black to black and white to white. Then connect the ground wire to the light chassis. You need 12/2 with ground for the circuit. You do not need a light fixture box for these type lights.

What are the differences between shunted and non-shunted tombstones and how do they affect the performance of lighting fixtures?

Shunted tombstones have internal connections between the two sockets, while non-shunted tombstones do not. This affects the performance of lighting fixtures because shunted tombstones are used with electronic ballasts, while non-shunted tombstones are used with magnetic ballasts. Using the wrong type can cause the fixture to not work properly or even damage the ballast.

Will a t 8 fluorescent tube work in a t 12 fluorescent fixture using a high output ballast?

Yes....usually. However, lamp (bulb) life may be somewhat shorter than if the proper t8 ballast is used. Since ballasts limit current flow in the circuit, a mismatched (t12) ballast would cause more current to flow through the t8 lamp than the lamp's design specification. The lamp's output would therefore be brighter in proportion to the additional current. Owners of aquariums and terrariums make use of this property by overdriving both T12 and T8 style lamps with ballasts designed to drive two (or more) lamps to drive a single lamp, therefore supplying 2x or more current to the lamp than its original ballast. This results in a greatly increased light output, somewhat reduced efficiency, and shorter lamp life.

How many openings has a digestive tube?

They have two.

Will a fluorescent lighting fixture that uses 4 4 ft T8 bulbs operate with only 2 bulbs installed?

The lighting fixture may have 1 ballast, or 2 ballasts. If it has only 1 ballast all 4 lamps must be good in order for it to work properly. It is recommended to replace all lamps at the same time, rather than just the one that is bad. Testing has shown that replacing just one, will shorten the life of the others controlled by that ballast. If 2 ballasts are used, each one is wired to 2 lamps. So, if one pair has a problem the other 2 will still work. To find out how many ballasts you have you must open the fixture. You can't miss them they are the big black rectangular objects.

Is a digital ballast better than transformer ballasts?

Digital ballast are much more efficient and more reliable than the traditional transformer ballasts. Digital ballasts are more efficient at producing light than a transformer ballasts. The digitals also run much cooler than transformers and are much more silent. Though some user may enjoy the transformers more, digital ballasts are more popular and are sold more often online. Yes, a ballast transformers has two special secondary windings to provide the proper low current. Also, Ballasts can operate more than one type of lamp.

Why choke is not used in CFL bulbs?

CFLs have two main components: a magnetic or electronic ballast and a gas-filled tube (also called bulb or burner). Replacement of magnetic ballasts with electronic ballasts has allowed the development of smaller lamps directly interchangeable with more sizes of incandescent bulb. Electronic ballasts contain a small circuit board with rectifiers, a filter capacitor and usually two switching transistors. The incoming AC current is first rectified to DC, then converted to high frequency AC by the transistors, connected as a resonant series DC to AC inverter. The resulting high frequency is applied to the lamp tube. Since the resonant converter tends to stabilize lamp current (and light produced) over a range of input voltages, standard CFLs do not respond well in dimming applications and special lamps are required for dimming service