divide 240 by 2 and.. voila.. you get 120!
The differencs is 240 minus 137 equals 103
50% of 240 is 120. 75% of 120 is 90.
240 ÷ 2 = 120
200 percent of 120 is the same as 2 times 120, which is 240.
One has an element designed to work on 120 volts, the other has an element designed to work on 240 volts.
It is simply a product of standardization.
No, it is not possible to use 240 volts with a 120 volt supply directly. You would need a transformer to step up the voltage from 120 volts to 240 volts. Attempting to use 240 volts with a 120 volt supply without a transformer can damage equipment and pose a safety hazard.
Seeing that the question comes from North America the most common duplex receptacle has 110 - 120 volts potential to ground. The second most common potential difference is 220 - 240 volts. These voltages are obtained from a 120/240 volt system common to home connections from the local utility companies.
In the USA it is usually 120/208 or 120/240 volts In Europe I think it's 220 volts
Any where between 220 and 240 volts are a nominal figure in the same voltage range. It is brought about by the power company, as they have a responsibility to keep voltages within a certain 10% range. The load will only notice a difference of 1% on the load current. eg. Wattage load of 2400. Amps = watts/volts. 2400/240V = 10 amps. 2400/220V = 10.9 amps.
If you measure the voltage between the hot wire (480V) and the ground using a meter, the reading should be close to 480 volts. Ground is typically considered to be at 0 volts potential, so the voltage difference between the hot wire and ground should be around 480 volts.
240 watts at 120 volts requires 2 amperes. Power = voltage * current
If that is the information that is stated on the nameplate of the device then yes it will operate on 120 volts.
30 amps.
In North America 120/240 is the main voltages used. It is known as a three wire system. L1 to L2 supplies 240 volts. L1 to N supplies 120 volts and L2 to N supplies 120 volts.
It is usually 240. Two lines enter your house, carrying 120 volts each, but they are out of phase by 180 degrees, so the two combined entering your house provide 240 volts, which is necessary for powering central air conditioning systems. You also have the option of powering everything else in your house with 120 volts because of the phase difference of 180 degrees without the need of a 2:1 turns ratio transformer in your house. You breaker box in you basement is wired to take advantage of this phase difference, supplying the 240 and 120 volt sources to the places that they are needed. This is a huge advantage of AC power.