The phrases "220V," "230V," and "240V" all refer to the same system voltage level in North America. 208V, on the other hand, refers to a distinct system voltage level. With electrical loads, the voltage drops; hence, voltages less than 120 and 240, such as 110, 115, 220, and 230, are commonly used. Voltage levels greater than 120 are not common because most appliances designed for use in Europe will not function properly at these higher levels.
Generally, any appliance that uses electricity will have some type of voltage rating. This rating can be found on the manufacturer's documentation like the box or booklet that comes with the product, or on the actual device itself. The voltage rating shows how much pressure an appliance can take before it is damaged by the current being delivered to it. For example, an electric stove might state that it requires 600 milliamps to operate; this means that the stove can safely be connected to a power source capable of delivering up to 60 amps for a few minutes at a time.
In addition to voltage ratings, many devices include a current rating too. This tells us how much total power (amperes times volts) an appliance can consume without being damaged. For example, a microwave oven can normally be loaded with a maximum of 10 amperes - this means that it can spend up to 10 hours continuously using 10 watts of power.
Power supply is 220V. 220-volt service may be referred to as 230, 240, or 250 volts. They are all the same, just as 110-volt power might be characterized as 115, 120, or 125 volts. The majority of home electronics, such as lights and appliances, operate on 110-volt electricity. Some older equipment requires 120 volts while other more modern devices require only 110 volts. It's usually not a problem if you have both types of plugs available at your destination.
Similarly, the higher voltage range is denoted as 220, 230, 240, and 250 volts. This higher voltage range is used to power big appliances including washing machines, dryers, and air conditioners. Smaller appliances such as hair driers and curling irons can be run from a line voltage of 120 volts. The presence of a transformer will usually indicate that there is more than one circuit breaker feeding off of a single wall outlet.
Line voltage is the voltage that remains after removing the current flowing through it. In other words, it's the potential difference between two points on a circuit relative to some reference point. For example, the voltage between the hot wire and the neutral wire on a three-wire plug is called line voltage. Line voltage is always greater than zero but can be as high as 240 volts with a U.S. household wiring system or 277 volts with a European household wiring system.
The term "line" comes from the fact that early electrical systems were built around direct-current (DC) technology. A DC circuit needs only one conductor to transmit electricity, so they are less subject to noise problems than alternating-current (AC) circuits. Also, the voltage needed to start a DC motor is higher than that required for an AC motor, so DC motors are often used in applications where speed is important, such as electric vehicles and industrial machinery.
Wiring a 230-volt outlet is the same as wiring a 220 or 240-volt outlet. When electricity is hooked into a residence, the power company delivers 120 and 240 volts with a 5% margin of error. As a result, 220, 230, and 240 volts are interchangeable and connected the same way. The only difference is that an amp meter will read higher when measuring voltage from a 230-volt source as opposed to a 240-volt source.
The voltage of a house circuit is measured by a breaker or meter located in the basement wall next to the electrical box. This is called a load center. The metal shell around the box is used for grounding protection. If you were to connect a wire to this shell it would be considered live metal and could cause serious injury if not done properly. The load center provides an opening for receiving a plug end of a cable. This opening is usually covered by a removable plate called a ground plate. The box itself is the distribution center for voltage throughout the house. It distributes current through conductors called hot wires that carry voltage from the panel to the various outlets and fixtures. These hot wires can also be used to transmit current where it is needed in order to operate lights, appliances, and other equipment without having a separate conductor for each item plugged in. The third set of wires coming into the box serves a protective purpose by carrying current if something else is plugged into one of the outlets. This would include a person touching a live wire or device causing an electric shock.