IEC 60309 – Wikipedia
Industrial and multiphase power plugs and sockets - Wikipedia
IEC 60309 - Wikipedia
AC power plugs and sockets - Wikipedia
AC power plugs and sockets: British and related types - Wikipedia
AC power plugs and sockets - Wikipedia
AC power plugs and sockets - Wikipedia
File:IEC 60309-2 32-30A 3P low-volt plug.svg - Wikipedia
AC power plugs and sockets - Wikipedia
AC power plugs and sockets: British and related types - Wikipedia
AC power plugs and sockets - Wikipedia
AC power plugs and sockets - Wikipedia
IEC 60309 – Wikipedia
IEC industrial standard
IEC industrial standard