Mains and external signal cables longer than 10 m shall in areas where lightning is frequent be protected with an external lightning surge protection at the cable entrance to the building.
主线和外部信号线超过10米的，在线进入大楼的入口处时设置避雷保护，避免雷击。
Through describing the hazards of lightning on fiber optic cable, several lightning protection measures of cable line are introduced.
通过描述雷电对光缆的危害，简要介绍了光缆线路的几种防雷措施。
Abstract: lightning damage to the cable system is very strong. In the cable television systems, lightning protection design is a very important job.
摘要：雷电对有线电视系统的危害十分强烈，在有线电视系统中，防雷设计是一项十分重要的工作。
Abstract: lightning damage to the cable system is very strong. In the cable television systems, lightning protection design is a very important job.
摘要：雷电对有线电视系统的危害十分强烈，在有线电视系统中，防雷设计是一项十分重要的工作。
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