With the development of the network, optical fiber is used as a medium used in the comprehensive wiring system to transmit data, because it has the advantages of high transmission rate and long distance, which is increasingly used by people. As we all know, optical fiber has non -conductivity and can be exempted from impact current. The optical cable also has good protection. The metal components in the optical cable have a high insulation value of the ground, and the lightning current is not easy to enter the optical cable. It is a direct -buried optical cable with a armor layer. Therefore, when the optical cable line is hit by lightning, the optical cable can also be burned or damaged. Here are the main measures for the optical cable optical fiber lightning protection in the comprehensive wiring project.

       Measures I. Lightning protection of the direct -reasonable optical cable line: ① The grounding method in the bureau, the metal parts in the optical cable should be connected in the connector part, so that the reinforcement core, moisture -proof layer, and armor layer of the relay segment optical cable should be connected. ② In accordance with the provisions of YDJ14-91, the moisture-proof layer, armor layer and enhanced core should be disconnected at the optical cable joint, and they are not grounded. It can avoid the introduction of light -mightning currents from grounding device into optical cables due to the differences in lightning protection and cable metal components on ground circuit impedance.

       Measures 2. For overhead optical cables: overhead cables should be connected electrical and grounded every 2km. When grounding, you can directly ground or use the appropriate surge protection device to ground. In this way, the suspension line has a protective effect of overhead ground lines.

       Measures III. After the optical cable enters the terminal box, the terminal box should be grounded. After the lightning current enters the metal layer of the optical cable, the terminal box can quickly release the lightning current to protect. The direct buried optical cable has the armor layer and the reinforcement core. The outer condom is PE (polyethylene) protective cover, which can effectively anticorrify and prevent mouse bite.