Industrial plugs and sockets come in the following current ratings: 16A, 32A, 63A, and 125A. The voltage specifications include several series: 110V, 220V, and 380V, with 220V (blue) and 380V (red) being the two main types. They are available in 3-pin, 4-pin, and 5-pin. We test all of our CEE plugs and sockets according to the following standards before shipping them: The international standard IEC 60309 applies to plugs, receptacles, connectors and appliance couplers that are mainly used in industrial sectors (rated voltage up to 1. They are available in 3-pin, 4-pin, and 5-pin configurations.