One-section sockets[clarification necessary] have two current-carrying connections for the power provide circuit, and may even have a 3rd pin for a security connection to earth ground. The plug is often a male connector, normally with protruding pins that match the openings and female contacts in a socket. IEC plug types https://messiahxfmua.theblogfairy.com/28932228/not-known-factual-statements-about-electrical-wall-plug-types