# How can you run a 240V supply into your home when the circuit breaker is 120V?

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for USA, Canada and countries running a 60 Hz power service. A service drop to a home is done with wire that is called triplex. This means that there are three wires twisted together that go from the service pole to the mast head on your home. This is called a three wire system. There are 2 hot legs and a neutral. The voltage between the hot leg (one) and the neutral is 120 Volts. The voltage between the hot leg (two) and the neutral is 120 Volts. The voltage between hot leg (one) and hot leg (two) is 240 volts. The single pole breaker is a safety device that connects to the (load, at 120 volts) and returns from the load back to the neutral. The load in most cases will be lights, plugs small appliances. The two pole breaker is a safety device that connects hot leg (one) to the (load, at 240 volts) and returns from the load back to the hot leg (two) at the two pole breaker. The loads in this case will be oven, range tops, hot water tank, clothes dryer, and in many homes baseboard heaters.

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In USA 240V comes into your home even though most of your equipment is 120V. I say most because your clothes dryer for one, if you have an electrically-heated one, most likely runs on 240V. The answer to your question is that 2 legs (power lines) come into your house. One leg is colored Black, the other is Red.

Each leg is 120V to common (ground). The voltage is AC (Alternating Current) so it is always going from +120V to -120V on each leg. But at opposite times, so that at some point in the cycle one leg is +120V while the other leg is -120V. And if you measure the voltage difference between +120V and -120V you get 240V.

The US wiring system works like this: to turn on your lights you switch into one leg, the current goes through your wiring to your lights and back to common. But your dryer switches into one leg and returns the current to the other leg. If you look in your breaker box you see breakers on both sides. Looking straight across, these breakers are on the same leg (L1). The next set down the panel are on the opposite leg (L2). Adjacent breakers all the way down the panel are on opposite legs. A two pole breaker spans these adjacent legs and that is how you arrive at 240 volts. Your dryer is connected to a two pole breaker that taps into both Black and Red legs.

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To accurately specify a voltage, you have to specify two points to measure, and the voltage is the difference between the two. If only one point is given it is usually implied that the second point is a grounded or 0 volt point. In the U.S., the three wires that enter most homes can be thought of as at +120V, -120V and 0V relative to ground. The 0V line is the "grounded" conductor, sometimes also called "neutral" and must be well connected to the earth where the wires enter the building (and no where else!) The +120 and -120 are actually different phases of an AC voltage wave. So by choosing which two points to connect to, a load can receive 120V or 240 V. Since there are two ways to get 120V, the breaker panel is usually set up to distribute the load between the two 120V phases.

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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 JOB
SAFELY AND COMPETENTLY
REFER THIS WORK TO QUALIFIED PROFESSIONALS.

.
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# How do you get 120V from a single circuit breaker box that has a 240V line coming into the box that has one black one white and one bare line?

The s given below are ONLY for USA, Canada and countries using similar 120/240 Volt, 60 Hz mains power supply systems. If the box has 3 wires at 220V you can't get 110V. The

# How do you upgrade the service from a 120V 100A circuit breaker to 240V 30A for appliances like ovens and dryers?

Have an electrician wire you a proper line for the appliance. You were just kidding about the 100A, right? 10, or 20amp, not 100.

# Can you take a 240V circuit and run it into another box running 4 120V breakers off it?

Answer . Yes you can. What you cannot do, is exceed the number of amps. the feed breaker has. For example: Your 220 is rated at 60 amps. The combined amps the four 110

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Answer . In simple words, NO!!! On the first day of Electricity 101 they tell you if you do not know what you are doing, DON'T DO IT!!!

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Answer for USA, Canada and countries running a 60 Hz power supply service. . The plain answer is that you can't! There is no 110 Volt application I can think of that would

# How do you wire an existing 240V circuit line as the feed to a new subpanel with 120V circuit breakers?

Answer for USA, Canada and countries running a 60 Hz power supply service. . Warning that must be heeded . Firstly, you MUST have 4 wires run to your sub-panel. If the

# How can you make a 240V device run on 120V?

Answer . you can't , you need 230 volts and you can't double up 115 to make it work

# Can you tap into a 240V circuit to get 120V?

Answer . On a pure 240V circuit, no. There is no neutral. On a 240/120V circuit, yes. You have the needed neutral.. Tapping 120volts off an existing 240volt branch circui

# Can you run a 240V heater on 120V supply?

Answer for USA, Canada and countries running a 60 Hz power supply service. . You can BUT it will not warm up to its rated amount, therefore, it probably will not perform it

# Can you run a 240V appliance on 120V?

In general, no don't try it. The result will either bedamage (e.g. overloaded motor burnout) to the appliance or a severereduction (e.g. an electric heater giving off only 1

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# How do you run a 120V outlet off a 240V water well breaker?

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# Can you run a 120v product on 240v?

No, the manufacturer specifies the voltage that the device has to operate on and this voltage has to be adhered to. If the question was "Is there a way to run a 120 volt produ

# When going from 1-240v to 2-120v circuits do you need to replace the double pole breaker?

Yes, otherwise your double pole breaker will shut the other circuit off when one of them trips.

# Can you run a 120V heater with a 240V supply?

Definitely not - it would burn out quickly and probably cause thecircuit breaker to trip as well.

# Can GFCI circuit breaker handle a 240V circuit with a 120V circuit sub-paneled off if it?

I don't know if you are trying to ask if you can run a 240V panel off a GFCI or run a 120 V sub panel off of a GFCI. Can you clarify please,,,Thanks

# 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