What would you like to do?

In the event of a city power cut can you use a single-phase 240V generator to connect across the two 120V phases supplying the house and would you still get 120V to neutral on each side?

already exists.

Would you like to merge this question into it?

already exists as an alternate of this question.

Would you like to make it the primary and merge this question into it?

exists and is an alternate of .

Answer Yes you can BUT because you asked this question you should have a pro show you how to do it. Just to give you a worst case example, transformers work in both directions so if you feed the "city" with 220v your neighbors will enjoy your power until your generator burns up. Maybe 2-3 seconds!  Another thought Yes, IF you have a neutral connection at your generator. If you do not connect the neutral you will not have 110v from hot to neutral. This is because your house must be perfectly balanced across the neutral to have the correct voltage divider to split 220V into 110V. This is near impossible in a residential situation. You need the neutral for 110V.
Also, buy a generator transfer panel if you plan to power your house off a generator. It's the law.
 MoreNot because it's the law, but if you don't have a transfer panel and you connect it directly to your panel you'll also be putting current to the lines coming into your house.

This is real scary for the electricians that come out to repair the power. The (city) power is off and they don't expect to see (feel!) any on your end. You could end up electrocuting someone.
28 people found this useful
Thanks for the feedback!

How can a 240V single-phase split ac work in the US which has a 120V 2-phase system?

Note "2-phase" to describe US residential service is depricated nomenclature. US residential service is single phase because the two hot supply phases have 0 degrees of separ

You need to connect a compressor which is rated at 240V ac but it is hooked up to a 120V power supply so you're uncertain on how that could be and how to connect the compressor?

  Answer     Your compressor is a dual voltage compressor. The original installer followed   the instructions to switch it (probably internally) to the 230 vo

Can you use 120V appliances on a 240V outlet?

  Not advised   Some appliances may work, but I imagine most would either blow a fuse or just burn out. Definately not advised unless you use a transformer. With th

240V drop black red white bare on a 50A CB installed on the main power panel you want to split ths into two separate 120V circuits using the white as neutral for both will the 50A cb function normally?

    Answer     It Will To The Exception That It Will Take Over 50 Amps To Kick The Breaker. You Will Have Two Circuits Protected By A Double Pole Breaker. Yo

Can you use 240v appliances on a 120v outlet?

  There are 110 volts going to recepticles along the walls ect. These are for lamps, vaccuum cleaners, most things besides stoves, dryers, heating and cooling(most). But t

What if you used 240V UK supply to power 120V US Bose speakers?

  Don't do it. Period. You will overheat the wires , blow the board and start a fire within seconds. I assume you're talking about the pre amp and the amplifier. Most soun

The motor states it is 230V single phase to operate. Does that mean you need two 120V lines in and just a ground with no neutral?

Answer for USA, Canada and countries running a 60 Hz power supply service.   The proper terminology is L1,L2,N. N is for neutral and it is this wire that is grounded. The v

How do you get a split phase 120v 240v power supply from a single phase 240v supply for an American RV with a 50 amp service?

This is a common misconception. A standard 240 utility feed, common in the US, and a 120/240 feed are one in the same, the exact same thing. It is called (historically) an Edi

My range came with a 4 wire power cord and it requires both 120V 240V. Should I connect three phases being one connected to the neutral?

No! Two hots and a neutral, plus a ground. The neutral would land on the screw marked with a "W" or with a white dot and the ground to the green screw, the two hots land on th

Is there anyway to get 120V 60hz from a 120V 50hz power supply?

Original Answer no Contributed Answer: Yes, it can be done, but not very economically. Thus, for practical purposes, the original answer is still correct. The problem is

How can you get 240V single phase power from a 240V 3 phase service Can you just connect to two poles of the 240V 3 phase service?

I'm sure this isn't what you want to hear, but you probably need to ask an electrician familiar with your service and what you want to connect. As a general answer, you can co

Where is the problem if you have 240V on your 120V outlet and 120V on the neutral?

Someone has wired 240 volts into your 120 volt outlet. If you have 240 volts you need a specially configured outlet so that a standard 120 volt plug cannot be inserted. If you

How do you get 120v from a three phase system?

Three phase in the USA have two common voltages; either 277/480 or 120/208. if the panel the power is to be taken from is rated at 120/208 then a single pole breaker in the

Can you use a 120v appliance with a 240v supply?

It depends on what the appliance is. Some smaller appliances have a dual voltage switch which allows you to adjust the appliance to the supply voltage. Look on the manufacture