Conventional plugs and sockets based upon two round pins with centres spaced at 19 mm are in use in Europe, most of which happen to be stated in IEC/TR 60083 "Plugs and socket-shops for domestic and comparable typical use standardized in member nations around the world of IEC. Period Sequence: https://edgarblrwb.blognody.com/29195750/types-of-electrical-cord-plugs-options