Industrial plug socket is a kind of plug used in industrial environment. The power socket has one or more seats into which circuit wiring can be inserted, through which various wiring can be inserted to facilitate connection with other circuits. NEMA wiring device must be as small as possible in order to realize frequent commutation, but also to realize braking during commutation and acceleration after commutation. Therefore, it is necessary to adopt commutation device quickly and braking device effectively. CEE connector CEE standard industrial plug socket is an explosion-proof socket, and the temperature is limited below 32 degrees. Good protection measures and strong insulation performance. Therefore, it is necessary to choose industrial plugs in the industrial environment. Here, we introduce the internal structure of industrial plugs and sockets, which varies according to different manufacturers, but generally speaking, the arrangement from left to right can be divided into bolt seats, bolt covers, cable racks, housings and cable sheaths, among which screws and other parts are used.We all know that industrial plugs are used in factories and buildings with a large population and many assets, so their sizes and wiring cables should be manufactured according to national standards, so as to make them more beautiful in shape and more reasonable in structure for market competition. In the design of handlebars, attention should be paid to whether the handlebars conform to human mechanics, whether they are conducive to people's mastery and application, whether the dimensions conform to the national standards, whether the wiring and plug installation methods are convenient for people to use.There are differences between the integral housing and the two-part housing for industrial plugs. The integral housing is generally not disassembled. The two-part housing is generally used as the front of the housing and socket, and the rear is used as the handle. The two-piece shell is connected by tapping screws, and the interface structure is connected by grooves and positioning teeth.Plugs in industrial plugs can also be called contacts. Their main function is to conduct electricity. There are also integral plugs and split plugs. Bolts are usually round and solid. The quality of bolts depends on the quality of bolts, and the main factors are the surface roughness, diameter and material selection of bolts. The selection of bolt materials must be made of materials with good conductivity and not easy to wear. When the rated voltage is greater than 50v or the rated current is 63a and 125a respectively, the industrial plug should use the auxiliary grounding pin. When the rated voltage is less than or equal to 50v, the industrial plug can only have phase pole plug, and can not have grounding or middle plug.The terminal is used to connect the pin wires. There are wiring holes, screws and screw holes on the upper side of the terminal. Therefore, the terminal should be able to clamp, pull strongly and not damage the wires. The socket can fix the socket and the terminal and isolate the poles. It has two forms: independent latch seat and integrated latch seat.