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It is hard to see a question here. Both of these voltages are currently use in electrical systems today. Both voltages are related to three phase systems.
A voltage of 208 volts is a three phase wye system that has a voltage of 208 between lines L1, L2 and L3 and 120 volts between any of the lines and neutral.
A voltage of 277 is the line to neutral voltage of a 480 volt three phase wye system. There is a voltage of 480 between L1, L2 and L3 and 277 volts between any of the lines and neutral.
What else can I help you with?
Can you take a 120 volt ballast and use it in a 277 volt light?
Yes, if there is a 208 volt connection on the multi tap ballast. One side of the 208 to the common terminal and the other side of the 208 supply to the 208 volt lead. 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.
What wire do I connect the 277 VAC wire to?
It depends on what 277 volt device you are trying to connect.
Will a switching power supply work on 277 volts?
Not unless it is rated for that voltage. You can likely find a step down transformer from 277 volt sto 120 volts.
Can you wire two 120 volt light bulbs to a 277 volt circuit?
Yes, you can wire two 120-volt light bulbs to a 277-volt circuit by connecting them in series. However, the voltage across each bulb will be 138.5 volts, which exceeds their rated voltage and could damage the bulbs. Instead, it is safer and more appropriate to use bulbs rated for 277 volts or use a proper transformer to step down the voltage. Always ensure compliance with electrical codes and safety standards when working with wiring.
How is a 15 amp 277 volt lighting circuit wired at the panel?
The voltage of 277 volts is the wye voltage of a three phase 480 volt distribution. In the 480 volt CDP (Central Distribution Panel), you will need a 600 volt rated single pole 15 amp breaker installed in the CDP. The load will be connected to the output terminal of the breaker and the other conductor will be connected to the neutral bus in the CDP. The minimum size conductor for the 15 amp circuit will be a #12 copper conductor.
Can you connect a 277V ballast to 208V line service?
No. A 277 volt ballast needs the correct voltage to operate. The 277 voltage is derived from the star point voltage of a 480 volt three phase system (277/480). The 208 voltage is a three phase line voltage whose star-point voltage is 120 volts (120/208).
Will 120 - 277 volt electronic fluorescent ballasts work on 208 volts?
NO! a 120-277 electronic ballast requires one "hot" wire and a neutral from either a 110V or 277V supply. If you supply it with two "hot" wires from a 208 V supply, it will instantly burn up.Yes. A ballast with a specification range of 120 volt to 277 volt will work on 208 volt. These ballast use intelligent voltage sensing technology and it does not matter if the source is a hot and neutral or two (2) hots. Don't believe it? Call a ballast manufacturer instead of giving incorrect answers.
What is the Largest amperage single phase 120 volt breaker made?
6000amps <<>> The above answer must have big lugs to accommodate 6000 amp capacity wire. In my breaker catalogue the largest 120 volt single pole breaker is 70 amps, 277 volt single pole is 150 amps and 347 volt single pole is 100 amps. The 120 volt single pole breaker occupies two opposed slots because of its length.
How many amps would it take to kick a 15 amp breaker with 7 ohms resistance on a 277 volt circuit?
A 15 amp circuit breaker should trip at 15 amps regardless of the load voltages or impedances. If you have 277 volts and 7 ohms, the current would be 39.5 amps and a 15 amp circuit breaker should trip.
In a normal 277 volt situation is there one hot leg or two?
277 volt systems aren't normail systems
Can you take a 120 volt ballast and use it in a 277 volt light?
Yes, if there is a 208 volt connection on the multi tap ballast. One side of the 208 to the common terminal and the other side of the 208 supply to the 208 volt lead. 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 you wire a 240 volt window ac from a 277 volt feed?
no
What size wire for 277 volt 1ph 13.2 amps heater?
depends on length of circuit, continuous duty or not. not knowing these factors i would say 12awg on a 20a breaker.
How many amps does a 277 volt primary and 120 volt secondary transformer draw with 6 amps on the secondary?
Assuming the transformer is ideal, the current on the primary side can be calculated using the formula for power: P(primary) = P(secondary). Since power is the product of voltage and current, the current on the primary side would be 1.38 amps (277V x Iprimary = 120V x 6A).
Can you install a 277 volt receptacle in place of a 240 volt receptacle?
No. To prevent this sort of thing from happening, the 277 volt device and receptacle is physically larger that a 240 volt receptacle and will not fit in a regular receptacle junction box. For a 277 volt system the proper size junction boxes have to be purchased.
What wire do I connect the 277 VAC wire to?
It depends on what 277 volt device you are trying to connect.
Can you wire up a 240 volt single phase water heater to 277 volt single phase?
no
