IEC C13 Socket

Also known as IEC C13 SOCKET, IEC 320,  C13 Female, CEE 22 or Kettle connector.
The 3-pin 10 AMP Power socket, referred to as a kettle type connector used to connect the mains supply to equipment.
The C13/C14 connectors are six sided (a rectangle with the top corners beveled off) and the pins are vertical mounted parallel to the shorter sides.