The selection of power cables should comply with the following rules

(1) The rated voltage of the cable must be greater than or equal to the rated voltage of the power supply system installed;
(2) The allowable current carried by the cable should be equal to or greater than the maximum carrying current of the power supply load;
(3) The cross-section of the wire and cable conductor must meet the needs of the power supply system to maintain stability during a short circuit;
(4) Calculate whether the voltage level of the cable meets the requirements according to the length of the cable;
(5) The minimum short-circuit current at the line joint should be able to make the protective device act reliably.
The production of wires and cables is different from the leftover methods of other products. Other products are generally installed and assembled with a single part. And so on. The more functional features a product requires, the more complex its production structure, and the more external layers it adds.