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What is the deference between 110V and 220V?

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2014-01-28 07:01:50
2014-01-28 07:01:50

Well, apart from the obvious one that 220V is double 110V, in practical terms

it means that you can move 4 times as much power through a 220V cable, as

you can through a 110V cable, provided that the cables are the same


Basically, it is an economic issue. The current (Amps) determines the diameter

of the copper cable. The more current required, the thicker (and heavier) the

cable must be.

Because P = V x A (Power = Volts x Amps), a country using 220V service

requires copper cable of only 1/2 the diameter to deliver the same amount of

power to all its consumers, as compared to a country which has 110V service.

On a 220V line, you are drawing only 1/2 the Current (amps) to achieve the

same power delivery, as compared to a line running 110V.

The USA, as a rich country, could afford to install an electrical infrastructure

of thick and heavy copper cables, with a lower and safer 110V voltage,

whereas the rest of the world took the cheaper option of thinner and lighter

cables at 220V to achieve the same power (Watts) delivery.

That's why an electric clothes dryer and other powerful devices like central

heating or big window air conditioners have to have a 220 volt supply; for the

same cable thickness, you can draw twice the power (watts) as compared to

a 110V line.

Related Questions

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Not really if the 110v plug has a 110v rated appliance fitted, 220v will blow the fuse or damage the appliance, and there is a chance that the 220v will be to much for the 110v plug to handle

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In 110v countries, it's got a 110v plug--the motor and heater in a dishwasher aren't very large, and the unit runs fine on 110v. In 220v countries, naturally the appliance runs on 220v.

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Because it's more dangerous to use 220V than to use 110V.

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The kind of motor that runs on either 110v or 220v has two coils in it. If you wire them in parallel you can run the motor on 110v. Wiring them in series lets you run it on 220v. The motor will come with instructions on how to do it.

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The fact that it's supposed to. Voltage is stated as the difference between the two wires carrying electricity to the load. When they bring power to the house from the utility, you get two wires carrying 110v but they're 180 degrees out of phase. Imagine one carries positive 110v and the other carries negative 110v. If you hook one of these wires plus a neutral (zero volts) to the load, you get 110v--110v over 0v. If you hook both of them to the load, you get positive 110v over negative 110v, or 220v. to white is 110v, black to white is 110v, red to black is 220v.

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