This article is about mains power connection devices used in domestic and light commercial environments. For other types, see Industrial and multiphase power plugs and sockets.
Plugs and sockets may sometimes combine male and female contacts, but the exposed pins or terminals in the socket are not energized. (clockwise from top left: German CEE 7/4 plug and CEE 7/3 socket, French CEE 7/5 socket)
AC power plugs and sockets are devices that allow electrically operated equipment to be connected to the primary alternating current (AC) power supply in a building. Electrical plugs and sockets differ in voltage and current rating, shape, size and type of connectors. The types used in each country are set by national standards, some of which are listed in the IEC technical report TR 60083, Plugs and socket-outlets for domestic and similar general use standardized in member countries of IEC.[1]