Notes on optical cables

- Aug 06, 2020-  


1. After the user receives the optical cable, check the optical cable certificate and the optical data provided with the optical cable, check the optical cable reel number, model, number of cores and length, etc., and check the outer package for no damage.

2. When laying out the optical cable, a traction rope must be used to connect with the optical cable reinforcement, and be fixed with a net sleeve or tape to the sheath. If it is a pipeline optical cable, a special rotating traction head must be added between the traction rope and the cable reinforcement, and it is not allowed to pull the outer sheath of the optical cable directly.

3. For the deployment of optical cables with a length of more than 2KM, it is not allowed to put them from beginning to end at one time. It is necessary to place the optical cable in the middle of the section and place it in an inverted 8-shape at both ends.

4. When unloading the optical cable from the car, it is best to use a forklift or crane hoist to gently place the optical cable from the car on the ground

5. In the field construction occasions, when unloading the optical cable from the car, it is advisable to use a straight board to place it between the car platform and the ground to form a 45-degree slope. Use a rope to pass through the middle hole of the optical cable, and the person pulls both ends of the rope on the car. It is the fiber optic cable that is rapidly sliding down the slope of the plank. When unloading the fiber optic cable, stack it carefully and lay it flat. It is strictly forbidden to drop the fiber optic cable directly from a high place and cause damage to the fiber optic cable due to strong impact.

6. When the optical cable needs to be rolled, it should be rolled in the direction of the rotation arrow marked on the cable reel, but long-distance rolling is not allowed.

7. Before construction, it is necessary to carry out single-disc inspection of the optical cable, such as the quality of the outer sheath and the attenuation index.

8. The maximum tensile force when laying the pipeline or overhead optical cable does not exceed 1500N, and the maximum tensile force when laying directly buried optical cable does not exceed 3000N.

9. When the optical cable is constructed and positioned, it must not be bent or form a 90-degree right-angle bend; for dynamic bending (such as during construction), the bending radius should be greater than 20 times the outer diameter of the optical cable for pipelines and overhead optical cables; for directly buried optical cables, bend The radius should be greater than 25 times the outer diameter of the optical cable; when laying and positioning, the bending radius should be greater than 10 times the optical cable radius for pipes and overhead optical cables; for directly buried optical cables, the bending radius should be greater than 12.5 times the optical cable outer diameter. Do not severely bend the optical cable and cause "dead button".

10. The tensile force of the optical cable during construction shall not exceed the allowable short-term force (pipeline, overhead optical cable: 1500N; direct buried optical cable: 3000N; ADSS optical cable: 20% RTS), and the allowable long-term force shall not be exceeded during operation (Pipeline, overhead optical cable 600N; direct buried optical cable 1000N; ADSS optical cable: MAT). Optical cable construction should be carried out under the guidance of appropriately qualified technical personnel.

It is very important for optical cables to be wired in the correct way. Improper construction can easily cause increased attenuation, shortened service life, fiber breakage, broken skin, and broken armor. Optical cables, especially feeder cables, have a larger diameter and heavier quality. When unwinding cables, you must use a bracket to mount the cable tray, and pull the cable while rolling the cable tray. If it is a loose cable that is not equipped with an optical cable tray, it must be handled. Wire the cables in the future. The wire pullers and the defensive personnel must be equipped with walkie-talkies to keep in touch. Do not pull with brute force when they are unable to pull them. They must be sorted out slowly before continuing, so as to ensure that our "fragile" optical cables are Safe deployment.


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