US homes use a 240 volt single phase 'Edison' system. It is a 3-wire (4 with the ground) system. Phase to phase measures 240v, while each phase to neutral measures 120v.
All outlets and lights are 120 volts except dryer, stove, oven, A/C, water heater, which are 240 volts.
The US does not use 120 volts at 50 Hertz.
120 volts 60 Hz AC
I think you mean "what is the voltage of the electric power distribution in US houses" It's called 240 volt single phase, which is a misnomer, as it is actually two phases of 120 volts each. Most outlets are connected to one of those phases and supply 120 volts to appliances. Some appliances that require more power connect to both phases for 240 volts.Addendum to the answer:The answer above might look a bit vague, the voltage in the US is 120V (same as Canada, most of Europe is 220-240 V), the electrical frequency is 60 Hz. Plugs used are A or B.
A unit of electrical equipment is designed for operation at a certain voltage - or within a certain range of voltages - i.e for 5 volts, 12 volts, 120 volts. 220 to 240 volts. Originally the UK household alternating current supply voltage was specified at 240 volts or, more precisely, 240 volts RMS +/-6%, running at a frequency of 50Hz.Some time ago, to allow harmonisation across Europe, the specifications were changed to 230 volts RMS +10%/-6%, also running at a frequency of 50Hz.Thus the mains supply voltage will remain within European Union norms (standards) even if it varies between an upper limit of 253 volts and a lower limit of 216.2 volts. So, because 208 volts is lower than the minimum range of a standard 230 volt 50 Hz supply, it is not safe to assume that any equipment which has a rating plate saying that it should be powered from a 208 volts ac supply can be used on a 230V ac supply without causing any damage. Such damage might affect the equipment itself or its surroundings or its "human" users... If the Asker could use the discussion page - by clicking the Open Discussion button shown below this answer - to tell us exactly what the circuit is, which "demands 208VAC single phase", that information would be interesting to know. Then, maybe, a much more helpful answer could then be given here!
Do you mean definition? If so 110V = 110 volts-60hz = 60 hertz. Hertz is the cycles that the electricity runs at. 60hz. is the US standard. Europe is at 50hz.
120 volts...
120 volts...
The voltage used inside a mixer is arround 30 volts DC. But in the US there are in the housholds 117 Volts AC/60 Hz. So you will use that.
The transformer outside your home reduces the voltage from several thousand volts to around 220-240 volts in your home. In some countries (US and Canada among others) this will be split to 110-120 volts.
220 volts. In the US.
110 or 220 for home service. Businesses may require 440 volts.
The majority of dryers in the US are rated at 240 volts. There are some smaller sizes that are used in small apartments that use 120 volts. These just plug into a regular receptacle outlet. They will only handle a small load and take quite a bit of time to completely dry the clothes.
120/240 volts is the working voltage in North America.
In the US all microwaves operate on 110 volts.
It depends on the country as to which voltage is used for industrial purposes. In the US, for welding for example, voltage may be 480 volts. The frequency in the US is 60 Hertz.
Yes, but you need to use a special 220 to 110 volts adapter.
120/240 volts at 60 cycles per second ac.It is supplied as a single phase service, split 120V-0-120V.One hot leg is 120 volts, a second hot leg 120 volts but running at 180 degrees out of phase from the first leg, and a neutral.Every 120 volt outlet in your home carries one leg of 120 volts plus the neutral.If the outlet has a ground, this is for safety in case there is a fault like a short of a hot leg to the internal frame or the outer casing of the appliance, which should always be connected to the ground. If such a fault occurs, the ground wire takes a very high current which causes the circuit breaker to trip or a fuse to blow.An appliance such as a clothes dryer in your home, that uses 240 volts, is using both hot legs. Because they are 180 degrees out of phase from each other, the combined voltage is 240 volts.For more information see the answer to the Related Question shown below.