电力电缆的选择应遵照以下原则：

Power cable selection should follow the following principles:

（1）电缆的额定电压要大于或等于安装点供电系统的额定电压；

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

（2）电缆持续容许电流应等于或大于供电负载的大持续电流；

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

（3）线芯截面要满足供电系统短路时的稳定性的要求；

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

（4）根据电缆长度验算电压降是否符合要求；

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

（5）线路末端的小短路电流应能使保护装置可靠的动作。