Waterproof cable joints are different from other common cable joints in that they are waterproof, because cable joints are often exposed to the outside, in water or in soil, so they must be waterproof. The purpose of achieving waterproof is not a very simple matter. Everyone knows that as long as there is a little bit of water, it can seep in. To produce waterproof cable joints, we must have a set of production processes and operating specifications.
   1. Install the normal process and make the connecting pipe.
   Wrap with tape, the overlap width is half of the bandwidth, and the winding length is more than 150-200mm. The number of layers depends on the voltage level. Then the outer layer is wrapped with J-20 self-adhesive tape, and the overlap is half the bandwidth. The length should exceed the tape by at least 100-150mm and the number of layers should be no less than 6 layers.
   After three things are done. They are rounded, and then wound into a circular shape by self-adhesive tape as described above, and finally wound with a plastic anti-wear tape, the overlapping amplitude is half of the bandwidth, and the overlapping amplitude is half of the bandwidth. The length should be at least 150mm longer than the self-adhesive tape, and the number of layers is not less than 3 layers.
The intermediate joint made by the customer in this way was soaked in water for about 3 months without problems.
  2. Waterproof treatment steps for the low-voltage cable intermediate joint:
  1) After the terminal is crimped, wrap the waterproof filler around the terminal. Shrink the heat shrinkable tube.
  2) If it is a slightly humid environment, wrap the waterproof packing tape on both ends of the cable and shrink the sheath tube (the two ends of the sheath tube must be glued).
  3) If the environment is bad, you must use self-adhesive waterproof tape to strengthen the waterproof (you can also use heat-shrinkable waterproof tape, we usually use self-adhesive tape, heat shrink tape is used for cable damage repair). the way is:
A. After filling the waterproof filling adhesive, wrap the outer layer of the filling rubber with a self-adhesive waterproof tape or stretch the self-adhesive waterproof tape to wrap the multilayer, but the thickness should not be too thick, so as not to cause the insulating sleeve to not enter.
B, shrink the heat-shrinkable tube at the glue.
C. Wrap the waterproof tape on both ends of the heat shrinkable tube, then wrap a layer of self-adhesive waterproof tape, wrap the waterproof tape and self-adhesive tape on both ends of the cable insulation sheath, and then heat the shrinkage of the sheath tube.