電力電纜的選擇應遵照以下原則：

Power cable selection should follow the following principles:

（1）電纜的額定電壓要大于或等于安裝點供電系統的額定電壓；

（1） rated voltage of cables installed point to is equal to or greater than the rated voltage of power supply system,

（2）電纜持續容許電流應等于或大于供電負載的zui大持續電流；

（2） cable continued allow current should be equal to or greater than the maximum continuous current power supply load,

（3）線芯截面要滿足供電系統短路時的穩定性的要求；

（3） wire core section should satisfy the stability of the power supply system short circuit requirements;

（4）根據電纜長度驗算電壓降是否符合要求；

（4） according to the cable length checking whether the voltage drop requirements,

（5）線路末端的zui小短路電流應能使保護裝置可靠的動作。

（5） the end of lines of minimum short-circuit current should enable the protective device reliable action