The connection of various cables and terminals shall follow the principle of connecting with the same material.

The connection of various cables and terminals shall follow the principle of connecting with the same material. For example, aluminum cables are connected with aluminum terminals, copper cables are connected with copper terminals, and copper electrical terminals must be connected with copper terminals. This is because long-term contact between copper and aluminum will produce oxidation and poor contact, resulting in sparks, fire and damage to power facilities.

When stripping the insulation layer of conductor (cable), the wire core shall not be damaged and the metal of wire core shall be exposed. The stripped length of the insulating layer shall meet the requirements. When the cage terminal is used, the stripped length of the insulating layer shall meet the requirements specified in Table 1; When the stripping length of non front wiring and other cage spring wiring is unknown, first insert the special screwdriver into the process square hole of the cold pressing terminal to open the spring hole of the cold pressing terminal, insert the wire into the deepest part of the round hole of the cold pressing terminal (until resistance is encountered), take out the special screwdriver, insert the special screwdriver and take out the wire, At this time, the length of the wire indentation from the wire end is the wire length of the cold pressed terminal end.

In terminal blocks, contact force is one of the basic elements. If there is not enough contact pressure, it is useless to use the best conductive material. Because if the contact force is too low, there will be displacement between the conductor and the conductive sheet, resulting in oxidation pollution, increasing the contact resistance and causing overheating.

“Surface treatment: there are two commonly used,
1. Pickling: the color of pickled copper is basically the same as that of red copper, which can play a beautiful role in oxidation resistance and is more conducive to conductivity.
2. Tin plating. The surface of the copper nose after tin plating is silver white, which can better prevent oxidation and conductivity, and prevent the diffusion of harmful gases generated by copper in the process of conductivity.”


Post time: Sep-11-2021