After installation and use of Industrial Plugs And Sockets, the charged parts of the plug and socket can not be touched by people. Especially, the protective shell of the mobile socket should have good strength, and it is not easy to break when it falls or is impacted. The socket's socket distance from the outlet of the socket should have enough distance to prevent a plug socket from being inserted into the socket, and the other pins are exposed to the outer shell of the socket, causing the danger of electric shock. Any type of socket (wall socket or movable socket) can not be touched by a person after installation and in use, especially in a movable socket whose protective shell should have good strength, not easy to break when falling or being impacted. The socket's socket distance from the outlet of the socket should have enough distance to prevent a plug socket from being inserted into the socket, and the other pins are exposed to the outer shell of the socket, causing the danger of electric shock. If the socket has metal panel housing, these metal parts should be grounded. In addition, it should be noted that the mobile socket can not use metal shell.

The structure of mobile industrial plug and socket (only refers to removable socket).
The movable socket should have a wire clamping device, that is, there should be a device in the outer shell that can be fixed firmly, under the external force (60N or 80N), and the wire will not be loosened or disconnected from the upper (connection point). There is a hole in the socket with ground socket, then the plug part should have grounding pin. At present, the market can see the "two pole earthing Jack" on the socket (commonly known as the three jack), and its plug is a two pole plug, which is absolutely not allowed (in fact it causes the socket hole to be a false grounding). The insertion between socket and plug should be consistent with polarity. Protective components such as switches and fuses of the socket shall be connected to the L pole. The rated current of the plug of the mobile socket should not be less than the rated current of the socket.

Institutions and structures
The operation of switch should be convenient and flexible, and the action is accurate and fast. The operating parts (buttons, pull wires, buttons, etc.) should not stay in the middle position between the open and the broken. The current carrying parts in the switch shall use the metal containing more than 50% of the standard specified in the standard, and avoid using the way similar to copper and aluminum materials. The mechanical contacts of switches should have better breaking capacity, and no larger or continuous arcs can be generated when breaking.

Terminal terminal
There are two kinds of common screw terminals and fast terminals. The latter simply inserts the wires into the terminal holes. The connection is completed, and it will never fall off. It is more convenient to use.

Fluorescent switch
Fluorescent switches generally have two kinds of type and luminescent type (such as neon bubble), the former is lower in price, but the energy is quickly exhausted after the phosphor is disappearing in the external light source, and it can not play the role of fluorescence. And the power luminescence technology can be used for a long time.

Insulating material
The outer shell of the socket and all the insulating materials used must have good insulation property to ensure enough insulation resistance and strength between the charged parts and the parts that are easily touched and the charged parts of different polarity (the ability to withstand high voltage shock). The insulation material on the socket must have good heat resistance and fire resistance, which is a very important index. In the use of sockets in use, due to current action or abnormal work, failure and other reasons, may lead to higher temperature, or even make charged metal red heat, which requires that the insulating material in the socket should not be deformed and softened under certain temperature conditions, and does not cause the flame to spread when the electrified parts are exposed or when the fire is encountered. When consumers buy plugs and sockets, it is best to do a burning experiment on their core components, but if there is no condition, in appearance, the good material is generally hard, hard to scratch, the structure is tight, and the weight is heavy.

Creepage distance and electrical gap
The creepage distance refers to the shortest path between two conductive parts with different polarity or between the electrified parts and the surface of the easy touch surface along the surface of the insulating material; the electrical gap refers to the shortest distance between these components. The creepage distance and electrical clearance between components of the socket must meet the standard requirements.

Switch contact
There are two kinds of good switch contacts: pure silver and silver lithium alloy. The electrical conductivity of silver is very good and can fully meet the requirements of the contact. However, because of the low melting point of pure silver, it is easy to melt at high temperature or to deform after repeated use. The silver lithium alloy not only ensures the good conductivity of silver, but also effectively improves its melting point and hardness.