Cable sizing is critical to ensure electric system safety, efficiency, and performance. The following principles should be complied with when selecting electrical cable sizes:
- Cable’s rated voltage should be greater than or equal to the rated voltage of the power supply system at the point of installation
- The continuous allowable current of the cable should be equal to or greater than the maximum continuous current of the supply load.
- The cross-section of the wire core should meet the requirements of the stability of the power supply system in the event of a short circuit.
- Check whether the voltage drop meets the requirements according to the cable length.
- The minimum short-circuit current at the end of the electrical wire shall ensure that the protective device can operate reliably.