Frequency and voltage supplied to most premises by country Mains electricity by country includes a list of countries and territories, with the plugs, voltages and frequencies they commonly use for providing electrical power to low voltage appliances, equipment, and lighting typically found in homes and offices. (For industrial machinery, see indust

Electricity comes into the home from the power line transformer in a pair of hot wires with an effective voltage of 240 volts between them. Each wire attaches to a bus bar in the main panel, and a return (neutral) bus sends a single wire back to the transformer.If you look at a 220V to 110V wiring diagram, you'll note that a 220V circuit has two ho