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If you are in the U.S., it means you can plug into the wall and it will work. The typical wall outlet is 115 volts AC and is a single phase supply. A couple of volts here or there doesn't mean anything to the appliance in question - whatever it may be.

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15y ago
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1w ago

120 volt one phase means that the electrical system operates at a voltage of 120 volts and is supplied by a single phase of alternating current. This type of power supply is commonly used in residential settings and for smaller electrical devices.

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Q: What does 120 volt one phase mean?
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How do you convert 277v to 120v for an outlet?

i think you just have to change the breaker from a 277 to a 120. 277 breakers are usually a 2 pole breaker and 120 is a single pole breaker. NO. 277v is not two poles, it is one pole, one single pole breaker in a 480 volt 3 phase system (typically). If you want 120 volts from a 277 volt source you need a step down transformer 277 volt to 120 volt , or 480/277 to 120/208 .


What happens to your air conditioner if you lose one 110 volt phase?

If it is a 240 volt conditioner it will stop. If it is a 120 volt conditioner it will stop if it is on the leg that has been lost.


You are measuring 480 volt from phase to phase and 280 volt phase to ground but one leg measures 440 volt phase to ground why?

Check for a blown fuse in one of the phase legs.


What is a 208 circuit?

The 208 volt configuration is one phase of a three phase source at 240 volts, where the 208 volt circuit is connected between the center tap of one 240 volt phase (usually a grounded neutral, in the style of a standard 120/240 split phase system) and the high delta connection on either of the other two phases. 208 circuit would consist of two phases of a 208 volt wye system or could be all three phases. The voltage between conductors would be 208 volts. The voltage to ground from any phase would be 120 volts. A 240 volt delta system would give you a high leg to ground, somewhere around 190 volts and the other two would be 120 volts to ground.


Can a 220 volt side lamp be used on 120 volt?

Yes. But not the other way. 120 volt one, cannot withstand 220volt.


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.


How do you create a common lead from 3 phase 120 volt?

If you are referring a common lead as meaning a neutral of a three phase system, the three phase voltage has to be 208 volts. This type of connection is in a wye configuration. It is found by this formula 208/1.73 = 120 volts. This connection will supply 120 volts between any one of the three supply legs and the grounded neutral.


Does your house have 440 volt line?

No houses are wired for 440 volts. In the USA, most houses are wired for 240/120 volts called single or split phase. That means each "leg" of the service is 120 volts to ground, but across the two it sums to 240 volts, since each "leg" is 180 degrees out of phase with respect to each other. When one "leg" of the service is at +120 volts, the other "leg" is its mirror image, at -120 volts. In this way, connecting across the two yields twice the voltage of either leg to ground, allowing the use of 240 volt or 120 volt appliances depending on how connected- to ground or across "legs". Most other countries with 220-240 volt appliances do not use split phase service. There is only the one phase to ground and in those countries the incoming line is 220-240 volts to ground, voltage depending on the country.


Can 1 phase be used with 3 phase?

If you have a 208Y/120 volt 3 phase system, you can use any one of the three phases (hot or ungrounded conductor) with the neutral for 120 volt load or you can use any two phases of the three phase for a single phase 208 volt load. If you have a 120/240 volt 3 phase system, you can use any two phases of the three phase for a single phase 240 volt load or you can use either the A phase or C phase with the neutral for a 120 volt load. You can not use the B phase with a neutral (you would have 208 Volts!).


What is mean by that a system is a three phase?

There are three "hot" conductors, all at voltage, and 120 degree phase shift apart from one another.


How do you get a 220 volt single phase from 380 volt 3phase synchrounos generator?

220 volt single phase from 480 volt 3 phase that one wire taken one phase and second wire connected in earth point. we get 220 v The above answer is incorrect, one phase from a three phase 480 volt system will give you 277 volts to ground. You must use a transformer to get the voltage you need.


How do you obtain a 230 volts single phase supply from a 400 volts three phase four wire supply?

400 volt three phase on a grounded system is 230 volt single phase, with each phase 120 degrees apart. So, if you have a 400 volt, three phase four wire service (grounded service), you can pull one phase off and reference to the neutral for 230 volt service. Note this may not allow 115 volt service, unless there is also a center tap for each phase.