IEC 60309
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IEC 60309 is a series of international standards from the International Electrotechnical Commission for "plugs, socket-outlets and couplers for industrial purposes". They are also referred to as "pin
16 A 250 V 3P+N+E 9h socket and plug. The round plug shroud has an alignment key that mates with a matching slot in the socket. The female socket has two additional divots which are not required by the standard, but provide access to screws to disassemble the socket. When mated, the spring-loaded cover on the socket hooks over the lug visible on top of the plug to lock the two together.
63 A, IP67 mated connection
IP67 plug and receptacle
63 A plug with pilot contact
Industrial and multiphase plugs and sockets provide a connection to the electrical mains rated at higher voltages and currents than household plugs and sockets. They are generally used in polyphase sy
IEC 60309-style plugs inserted into wall-mounted sockets
32 A 400 V 3P+N+E
16 A P+N+E 230 V plug
Mated 16 A plug and wall-mounted socket