本标准包含核电站电气设备和部件外部1E级电路电缆管道系统的设计、安装和鉴定要求。由于老化和辐射对金属电缆管道系统没有已知的有害影响，且非金属电缆管道系统仅限于地下或嵌入式应用，因此本标准不考虑老化和辐射。与支架相连的预埋件或结构构件超出了本标准的范围。

This standard contains the requirements for the design, installation, and qualification of raceway systems for Class 1E circuits external to electric equipment and components for nuclear power generating stations. Because aging and radiation have no known detrimental effects on metallic raceway systems and because nonmetallic raceway systems are limited to underground or embedded applications, aging and radiation are not considered in this standard. The embedments or structural members to which a support is attached are beyond the scope of this standard.