AC power plugs and sockets
AC power plugs and sockets are devices for removably connecting electrically-operated devices to the commercial power supply. An electric plug is a male electrical connector with contact prongs to connect mechanically and electrically to slots in the matching female socket. Wall sockets, (sometimes also known as power points[1][2], power sockets, electric receptacles, or electrical outlets) are female electrical connectors that have slots or holes which accept and deliver current to the prongs of inserted plugs. Sockets are designed to accept only matching plugs and reject all others. The contacts may be steel or brass, and may be zinc, tin or nickel plated. Each receptacle will have two or three wired contacts: ‘Polarised plugs and sockets are those designed to connect only in the correct orientation, so the hot and neutral conductors in the connected equipment are connected to the hot and neutral poles of the outlet.
