Origin of Schuko®
“Schuko” is a short form of the German term Schutzkontakt (literally: protective contact),[1] which indicates that plug and socket are equipped with protective-earth contacts (in the form of clips). https://en.m.wikipedia.org/wiki/Schuko It is very commonly used throughout Europe for 230V 50 Hz AC power up to 16A. Origin of Schuko® https://www.plugsocketmuseum.nl/Schuko-origin.html →