影响直埋交联电缆载流量的因素

Factors Affecting the Current-carrying Capacity of Buried Crosslinked Cable

分析影响直埋交联电缆载流量的内部因素(导体、绝缘、铠装等)及外部因素(敷设处的环境温度、敷设方式、土壤热阻系数、多回路敷设时的载流量修正等),通过实际工程案例,总结影响电缆载流量的主要因素,分析如何合理选择建筑进户电缆的标称截面积。

Internal factors （conductor, insulation, armoring, etc. ） and external factors （environment temperature of the location where the cable is laid, laying method, coefficient of soil thermal resistance, correction to current-carrying capacity with multi-loop laying） affecting the current-carrying capacity of buried crosslinked cable are analyzed. Based on actual engineering cases, the main factors affecting the current-carrying capacity of cable are summarized and analysis on how to reasonably select the nominal sectional area of cable connected to residential buildings is made.