What is IEC 60309?
IEC 60309, developed by the International Electrotechnical Commission, is a set of international standards for “plugs, socket outlets, and couplers for industrial purposes”. This standard lists down the accepted types, colors, sizes, and keying system of sockets, outlets, connectors, and inlets. As an overview, IEC 60309 maximum of 100 V DC or AC for voltage, 800A for current, and 500 Hz for frequency.