In actual operation, accidents caused by cable accessories are relatively frequent. Therefore, our staff should pay attention to the following aspects when installing cable accessories. For details, please see the following:

Moisture inspection:
Rubber and plastic cables should be dissected layer by layer to check for rust on the armor, metal shielding layer and wire core, whether the filler is damp, whether the buffer water-blocking tape has changed, and whether there are water droplets on the surface of the outer shield and in the wire core. If there is moisture, the cable should be cut off until there is no moisture in the cable.

Straightening:
When straightening the cable, fix the cable firmly by buckling two angle aluminums together. If the cable is vertical, use nylon ropes to tie several guy wires to keep the cable in a vertical state all the time. If the cable is lying flat, place it on a straight bracket to keep it in a horizontal state all the time.

In addition, during straightening, protective measures should be taken, and the cable should be allowed to cool naturally to room temperature. The cooling time is generally not less than 24 hours.

Insulation treatment:
The common method for treating the surface of cable insulation is to scrape it with special tools, glass sheets, etc., and then polish it with sandpaper. Usually, a grinder is used for grinding first, then manual fine grinding. The sandpaper used for grinding ranges from 240 mesh to 1200 mesh. It should be noted that during grinding, sandpaper should be used in order from low mesh to high mesh, and the sandpaper used for grinding the semi-conductive layer must not be used for grinding the insulation layer again.

Conductor crimping for connection:
Generally, before crimping, the insulation layer should be stripped according to the required length for connection, which is the depth of the connecting terminal hole + 5mm or 1/2 of the length of the connecting pipe + 5mm. Remove oil stains or oxide films on the surface of the conductor. For aluminum stranded conductors, use a steel wire brush to brush the conductor until the surface of the conductor is shiny. Also, after rounding the end of the cable conductor, insert it into the connecting pipe or terminal cylinder. For intermediate connection, each end of the conductor is inserted until it reaches the stop pit (or oil-blocking grid). For terminal connection, the conductor should be fully inserted into the terminal cylinder before crimping.

At the crimping part, the formed edges of the circumferential crimping or the center lines of the crimping pits of the pit crimping should be on the same plane or straight line respectively.

Usually, for each crimping of the crimping die, after the die is closed in place, it should stay for 10-15 seconds to allow the plastic deformation of the crimped part to be basically stable before releasing the pressure. In addition, attention should be paid to the crimping sequence.

Lead coating:
When coating lead, the lead sealing strip should use lead sealing solder made of 65% lead and 35% tin, which is in a paste state at 185-250°C. To ensure good sealing, lead sealing is carried out in two layers. To prevent damage to the cable insulation layer, the total time from the start of cable heating to the completion of sealing must not exceed 15 minutes.

In conclusion, power accessories play a very important role in cable construction. They not only effectively control the movement of high voltage but also ensure a certain stability of voltage during use, which is helpful for people's daily life and production. However, since there are strict requirements for the installation technology of cable accessories, during the installation project, they must be installed in strict accordance with the construction requirements to avoid a series of problems caused by improper installation methods, which may lead to safety accidents.