How are industrial connectors categorized?

Current classification: The current of industrial plugs and sockets is generally specified as: 16A, 32A, 63A, 125A and other series; Voltage classification: The voltage regulations are: 110V, 220V, 380V and other series, core number classification: the voltage of standard 3-core industrial plugs and sockets is 220V-250V, and the shell color is blue; The voltage of 4-core and 5-core industrial plugs and sockets is 380V-415V, and the shell color is red; Waterproof grade classification: The general regulations are: IP44 and IP67, the maximum current of IP44 is 63A, and the maximum current of IP67 is 125A. Other knowledge points: 1. Sockets matching industrial plugs are divided into concealed sockets, exposed sockets and connectors; 2. The concealed socket must be used in conjunction with the power box and cannot be used alone; 3. The surface-mounted socket can be fixed on the ground, wall or production line. If it needs to be fixed, it must be selected; 4. The connector is equivalent to a mobile socket, also called a docking socket, and cannot be fixed; Power wiring in computer rooms, factories, etc. is mostly used.

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