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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?
Wiki User
∙ 15y ago
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.
Wiki User
∙ 15y ago
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What is the total electricity supply for a home?
In the US: 120/240V. Newer homes generally have a 200 amp service.
For 1KW electricity does 240V or 120V cost less?
Power = Volts x Amps. Hence 1kW is irrelevant of voltage.
Is there any washer and dryer combo that runs on 120V?
Answer for USA, Canada and countries using similar 60Hz household electricity servicesSome appliances need two power leads, 120V for the washer and a separate 240V for the dryer. Others need only a single 120/240V service. Check what is available at your local electrical goods stores or from online websites.
What does electricity supplied 240v ac mean?
It means that the value of the potential difference supplied between the terminals varies from 240V to 0v and then polarity reverses and voltage again rises upto 240V with time.Then again it falls to 0 and polarity changes back and it rises to 240V. This is one cycle and in India we have a frequency of 50Hz, i.e. it happens 50 times in 1 second The voltage at any time can be calculated by V=240 sin(wT) i.e. the voltage at any point is a sine or cosine function of time. w is the angular frequency
Does a 31watt 240v motor draw 0.13 amps?
yes, 31watt divide 240v equals to 0.13amps.
What types of electricity are used in Australia?
240V AC 50HZ
Why Canada has 120 v electricity and India 240v?
120v is the standard for all of North America, whereas 240v is standard for the rest of the world.
How do you add a 240V outlet?
If you don't know that then you shouldn't be messing around with electricity. It's dangerous.
What is the frequency of the mains electricity supply in the UK?
The mains supply in Scotland is 50Hz.
What is the electricity voltage in Great Britain?
The electricity voltage in Great Britain is 230 volts.
Do Indian electrical devices work in US?
No India uses 240V at 50Hz the U.S. uses 110V at 60Hz.
What is the total electricity supply for a home?
In the US: 120/240V. Newer homes generally have a 200 amp service.
For 1KW electricity does 240V or 120V cost less?
Power = Volts x Amps. Hence 1kW is irrelevant of voltage.
What is 240v?
the voltage of the mains electricity in the UK
Is there any washer and dryer combo that runs on 120V?
Answer for USA, Canada and countries using similar 60Hz household electricity servicesSome appliances need two power leads, 120V for the washer and a separate 240V for the dryer. Others need only a single 120/240V service. Check what is available at your local electrical goods stores or from online websites.
How much does the electricity cost to run a 240v dehumidifier?
The average dehumidifier can cost anywhere between $100 and $200 in electricity per year.
Can the Mac book Pro operate on English 220V electricity?
There will be no problems as the Mac laptops are designed to work internationally with a line voltage ranging from 100V to 240V.
