The application range of cable grounding box is very wide, but it is a relatively small product in high-voltage electrical equipment. Generally, after receiving the goods, users can actually do some testing to ensure that they purchase high-quality cable grounding boxes.
First of all, the appearance of the grounding box should be flat and beautiful, with strong stability. The box should have no obvious welding spot, and the thickness should not be less than 2mm. The box and cover of the same batch of goods should be interchangeable.
Secondly, it is necessary to open the cover to see the internal situation. The most important thing in the grounding box is the cable sheath protector. If the process is good, the performance will not be bad. In addition, the internal connection row of the device should be copper bar, the overall layout design should be reasonable, the space safety distance should be guaranteed, and the inner diameter of the incoming pipe should be no less than 42mm.
Finally, we should check the sealing and waterproof performance of the whole grounding box. The sealing ring should be sealed as a whole. After sealing the pipe orifice, the grounding box should not leak within 1 hour when it is 0.5 meters below the water surface.
The above are some common standards for testing cable grounding box, I hope it can help you.