0
277v light fixtures are more efficient to operate and less expensive to install than a 110v fixture of identical wattage. 277v light fixtures are typically installed when 480V 3 Phase primary electric service supplies a commercial or industrial facility. 277v lighting circuits are single phase circuits using one of the 480v primary phases (A,B & C) to Neutral. The higher voltage allows more fixtures per circuit using smaller conductors and longer runs typically required in warehouse lighting applications.
( Amps = Watts/Volts: 400W/277V Fixture = 1.4 Amps, 400W/110V fixture = 3.6 Amps)
With 480V 3 Phase primary service, 110V Single Phase power is created using a Step-down transformer. The voltage transformation process consumes power (kWh) and the 277V fixture will consume less kWh than a 110V fixture if identical wattage, especially in fixtures with ballasts such as fluorescent or High Intensity Discharge (HID), like Sodium, Metal Halide or Mercury Vapor.
Wiki User
∙ 14y ago
Add your answer:
Earn +20 pts
What is the difference in amps used by lighting wired 277v vs 208v?
Answer for USA, Canada and countries running a 60 Hz supply service.Assuming you are using the same fixture, and assuming the fixture can operate on either voltage, you will get fewer amps with 208v than with 277v. However, a fixture designed for 208v will probably burn up on 277v, and a fixture designed for 277v will probably not produce any light on 208v.The two fixtures in reality are quite different. The 277v fixture is using one leg and neutral of a 277/480v 3 phase 4 wire system and the 208v fixture is using 2 legs of a 120/208v 3 phase 4 wire system.In commercial and industrial installations the 277v fixture is most common.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.
Is there a way to install a 277V light on a 120V circuit?
no ----------------------------------------------------------------------------------- Stepdown transformer. More expensive than buying the correct light fixture. Y-THINK-Y
In a three phase four wire wye system having 277V for lighting the three phase motors operate on what voltage?
480 Volt
Can a 240 volt electric fan be run on 277 volts?
No...that's too much voltage, and 277v is normally three-phase power.
How can you get 277V from residential service?
1You could get 220-240V from using the two live ["hot"] wires rather than one live and one neutral. 2Tim, Industrial control transformers are available to get 120 volts from 277 volt systems. If you feed one of these with 120 volts to the secondary coil, it will put out 277 volt from the primary. However, these are rare and are not cheap. If you are trying to use surplus 277 volt fluorescent lights on a 120 volt system, it would be cheaper to replace the ballasts in the fixtures. Another approach would be to use an autotransformer with a 240 volt primary and a 32 volt secondary. If you feed it with 240 volt and wire it to boost +32 volts that will give you 272 volt which should run the lights. But again, you are looking at $60 - $100 for one circuit of lights. 3If you have access to three phase power..... Phase to ground on a 480v 3 phase system is 277v.
Can incandescent lamps be 277V?
Yes, there are incandescent lamps available rated for 277V. These higher voltage lamps are typically used in commercial applications where 277V systems are common. It is important to always use the correct voltage rating specified by the manufacturer to avoid safety hazards.
Can a 1H75 be used with 277V?
No, a 1H75 ballast is designed for 120V input voltage. You would need a ballast specifically rated for 277V to operate fixtures at that voltage safely and effectively. It is important to match the input voltage of the ballast with the fixture’s voltage requirements to avoid damage or safety hazards.
What does 120 277v mean?
120 277V means that the electrical system is designed to handle both 120 volts and 277 volts. This is common in commercial and industrial settings where different voltage levels may be required for various equipment and lighting fixtures. It allows for flexibility in power supply options.
Is there a way to install a 120V light on a 277V circuit?
No, it is not safe or recommended to install a 120V light on a 277V circuit. The voltage difference could damage the light fixture and pose a fire hazard. It is best to use a light fixture rated for the appropriate voltage.
What is the difference in amps used by lighting wired 277v vs 208v?
Answer for USA, Canada and countries running a 60 Hz supply service.Assuming you are using the same fixture, and assuming the fixture can operate on either voltage, you will get fewer amps with 208v than with 277v. However, a fixture designed for 208v will probably burn up on 277v, and a fixture designed for 277v will probably not produce any light on 208v.The two fixtures in reality are quite different. The 277v fixture is using one leg and neutral of a 277/480v 3 phase 4 wire system and the 208v fixture is using 2 legs of a 120/208v 3 phase 4 wire system.In commercial and industrial installations the 277v fixture is most common.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.
Wiring diagram for 277 v ballast?
A wiring diagram for a 277V ballast typically involves connecting the incoming 277V power supply to the ballast, and then connecting the ballast to the light fixture. Make sure to follow the specific wiring instructions provided by the manufacturer of the ballast to ensure proper installation and to maintain safety standards. If unsure, it's recommended to consult a professional electrician.
Is there a way to install a 277V light on a 120V circuit?
no ----------------------------------------------------------------------------------- Stepdown transformer. More expensive than buying the correct light fixture. Y-THINK-Y
How can you attach a 120 v Light Fixture to a 277 v system do I need a ballast so what kinda of ballast?
To attach a 120V light fixture to a 277V system, you will need a step-down transformer with a 277V primary and 120V secondary. This will allow you to safely power the light fixture at the correct voltage. You do not need a ballast in this case, as ballasts are typically used with fluorescent lights and not for altering voltage levels.
Where does 277v power used in America?
It is used in Industrial lighting.
Can you use 240V single phase power to power 277V fluorescent light fixtures?
No...but you can buy an "autotransformer" that will boost the 220 to 277. Transformers of this kind can be the auto type or isolation type and are available at a much higher cost that it would be to just buy 220 volt ballasts and sell the 277 ones at your next yard sale. The fluorescent lamps probably won't start with such a severe undervoltage (80% rated). If they do start, they won't work well and the lamps will have reduced life.
Can you lower 277v to 240v?
Yes, you can lower the voltage from 277V to 240V using a transformer. A transformer can step down the voltage while maintaining the same frequency. Make sure to select the appropriate transformer with the correct voltage rating for the input and output you need.
How do you convert 380v 3 phase to 220v 3 phase?
Mathematically, just divide 480 by the square root of three. Electrically, 480V refers to the line-to-line value of a three phase system. For example, measure the voltage across A-phase and B-phase and you'll get 480V. 277V is the line-to-neutral value. Measure the voltage across A-phase and the neutral conductor and you should get 277V.
