电缆接地故障的主要原因有三种

There are three main reasons for the cable grounding fault

第一，电缆制造缺陷，为非合格产品；

First, the cable manufacturing defects, for non qualified products;

第二，运行环境恶劣、自然老化、以及遭受外力破坏；

Second, bad operating environment, natural aging, and destruction by external forces;

第三，安装不规范，接线粗糙。接地故障的根本原因却只有一个---电缆的绝缘材料。

Third, the installation is not standardized, wiring rough. There is only one root cause of the ground fault - the insulating material of the cable.