What is 220V?

220V refers to an alternating current (AC) electrical power supply that uses a nominal voltage of 220 volts. It is a common standard voltage for household electricity in many parts of the world, including Europe, Asia, Africa, and Australia. 220V is used to power a wide range of appliances and devices, from lighting and small electronics to large appliances like refrigerators, washing machines, and air conditioners. It's often associated with a higher efficiency in power transmission compared to lower voltage systems like 110V, as it allows for lower current for the same power, reducing resistive losses in wiring.