What regulations should be followed when selecting the cross-section of wires and cables?

Answer: The selection of power cables should follow the following principles:

1. The rated voltage of the cable should be greater than or equal to the rated voltage of the installation point power supply system;

2. The continuous allowable current of the cable should be equal to or greater than the maximum continuous current of the power supply load;

3. The cross-section of the wire core should meet the stability requirements of the power supply system during short circuits;

4. Verify whether the voltage drop meets the requirements based on the length of the cable;

5. The minimum short-circuit current at the end of the line should enable reliable operation of the protective device.