0
Technically two-phase has not been used for about 100 years, but a 240 v supply comes from a 240-v single-phase transformer. One of those with a centre-tap is often used to provide two 120 v supplies as well as a 240 v supply, and that's a split-phase supply.
Although 240 v bulbs are universal in some countries like the UK, bulbs are normally made for 110-120 v in USA/Canada.
What else can I help you with?
Can single phase 200v from japan use in US with two phase 120v 240V?
No, single-phase 200V from Japan cannot be directly used with two-phase 120V/240V in the US. The voltage and phase differences between the two systems make direct compatibility impossible. A voltage converter or transformer would be needed to convert the electrical supply to match the requirements of the equipment.
What countries use 240V?
Answer for USA, Canada and countries running a 60 Hertz supply service.The US runs 240V single phase in almost all residential applications.It just so happens that the 240V is center tapped to make 120V/240V split phase, but that is still a single phase application.For more information about the supply services in other countries, please see the answer to the Related Question shown below.
How do you convert 1 phase 240 volt power to 3 phase 480 volt power?
Any two legs of the 480V will give you 240 V Single phase. I apologize for the wrong information here. A friendly member reminded me of the correct answer. I stand corrected. Any two legs would be at 480 single phase. One leg to neutral will give you 277volts not 240 (408/1.73). You would need to install a step down transformer on the 277v line to achieve 240v.
How is it that devices which use 2 leads to make 240V don't need a return wire and where does the electricity go and how?
240 Volts uses both phases of the incoming service (each at 120 Volts and 180 degrees out of phase). Since the load is "balanced" there is no need for a separate "return" (when one phase is off the other is on). THAT IS WRONG! The 240 volts measured between the two wires comes from a single phase, not two phases. [Two-phase is an industrial transmission and power system utilized in only two parts of the United States, and the two phases are 90 degrees out of phase with each other.] Power flows in a circle, through the transformer windings and the load in series. The "return" is a matter of perspective, depending which of the two wires you designate as the "source"! As neither of the "hot" wires in a 120/240 Volt system is grounded in the United States, it is a misconception to speak of one wire as if it were a high pressure hose, and the other a drain.
How do you wire a NEMA 14 30 for 3 Phase 220v?
NEMA 14-30 plugs are typically used for single-phase 240V systems. If you have a three-phase 220V system, you will need to use a different plug and receptacle that is rated for three-phase power. Make sure to consult the electrical code and a licensed electrician for proper installation.
Can single phase 200v from japan use in US with two phase 120v 240V?
No, single-phase 200V from Japan cannot be directly used with two-phase 120V/240V in the US. The voltage and phase differences between the two systems make direct compatibility impossible. A voltage converter or transformer would be needed to convert the electrical supply to match the requirements of the equipment.
What countries use 240V?
Answer for USA, Canada and countries running a 60 Hertz supply service.The US runs 240V single phase in almost all residential applications.It just so happens that the 240V is center tapped to make 120V/240V split phase, but that is still a single phase application.For more information about the supply services in other countries, please see the answer to the Related Question shown below.
What will happen if two phase supply given to the single phase motor?
Two phase is single phase for today's purposes. We generally do not call 240v single phase "two phase" anymore, although technically that's what it is. 240v two phase has power to both lines to the motor versus 120v single phase has one power line and a neutral. Fortunately most single phase motors today are dual voltage. So check your nameplate data of the motor for guidance. The use of proper motor protection will prevent any damage to motors if wrong voltages are inadvertantly applied.CommentA two-phase system is an archic system, in which two phase voltages are displaced from each other by 90 electrical degrees. Like three-phase, it had the advantage of producing a naturally-rotating magnetic field, so could drive induction motors without any need for a starting capacitor.
What is the standard voltage used in homes and businesses in New York City?
Standard household and business power in the entire US is 120V single phase and 240V double phase. Light industry will likely use 208V three phase, 240V three phase, 400V three phase, 415V three phase, or 480V three phase. Heavy industry and subway systems use higher AC voltages and sometimes DC.
Can you replace a 480-240V 3-phase motor with a single phase motor as a temporary replacement or will it burn it out?
Yes, you can, and it won't burn out IF>>> the horsepower rating is the SAME. Pay attention to wiring and motor rotation. Also check the voltage: the motor voltage must be the same as the voltage between two hots of your 3 phase system. You will only use two hots as this is a single phase motor.
Can you use one wire from the panel with 240v on it to wire a 240v water heater?
In North America it takes two "hot" wires to obtain 240 volts.
Do any businesses use single phase power?
Single phase power is good for small loads like lighting fixtures and heating devices.
Can you use a GFCI on an unswitched circuit line red that uses the same neutral white for a switched circuit coming from the other phase line black in a 240v breaker panel?
Yes. You are allowed to use a neutral for one circuit from each phase of your service. For example, in a residential service, you can use the same neutral for circuits 1 and 3. In a commercial (3 phase) service, you can use a neutral for circuits 1, 3, and 5. You will experience problems if you use a neutral for two 'black' circuits or two 'red' circuits, if the circuits originate from the same phase bus bar. Also, AFCI's are sensitive to sharing neutrals, but GFCI's are not.
How do you convert 1 phase 240 volt power to 3 phase 480 volt power?
Any two legs of the 480V will give you 240 V Single phase. I apologize for the wrong information here. A friendly member reminded me of the correct answer. I stand corrected. Any two legs would be at 480 single phase. One leg to neutral will give you 277volts not 240 (408/1.73). You would need to install a step down transformer on the 277v line to achieve 240v.
How is it that devices which use 2 leads to make 240V don't need a return wire and where does the electricity go and how?
240 Volts uses both phases of the incoming service (each at 120 Volts and 180 degrees out of phase). Since the load is "balanced" there is no need for a separate "return" (when one phase is off the other is on). THAT IS WRONG! The 240 volts measured between the two wires comes from a single phase, not two phases. [Two-phase is an industrial transmission and power system utilized in only two parts of the United States, and the two phases are 90 degrees out of phase with each other.] Power flows in a circle, through the transformer windings and the load in series. The "return" is a matter of perspective, depending which of the two wires you designate as the "source"! As neither of the "hot" wires in a 120/240 Volt system is grounded in the United States, it is a misconception to speak of one wire as if it were a high pressure hose, and the other a drain.
Can you get 220 VAC single phase by using the ground and one of the hot wires in a 440VAC three phase circuit?
Use a transformer. A 208-240v single phase line has 2 power leads. Consult your local electrician for help! 440v systems are not for toying with when questions like this are asked.
If you have a 240V dryer and installed 30A breakers on both sides of the line reads 120 and 120 how do you get 240 and you have a receptacle that reads 30A 125250 and still does not work?
you do NOT put two 110v breakers in. you put 1 two pole breaker in. the panel is designed to give you 220v off one side OR the other side if you use a 2 pole breaker on one side or the other side. If you look at both 120V lines on an oscilloscope you will notice that they are both 120V to the neutral, but they are 180 degrees out of phase. This means that when one hot is at +120V the other is at -120V. So between the two you have 240V. If you put your meter across both hots you should see 240V. If you do not see 240V across both hots you (or an unlicenced electrician) has wired the outlet without using a proper 220V breaker. You do not see 240V because the hots are in phase, to the voltage differential is 0V, not 240V. 220V breakers cannot do this, unless forcebly installed in the wrong type panel. More than likely someone tried to wire it with 110V breakers.
