What Are The Regulations For The Use Of Mobile Optical Cables?

- Jun 22, 2020-  

1. The bending radius of the mobile optical cable should not be less than 15 times the outer diameter of the mobile optical cable, and should not be less than 20 times during the construction process.

2. The traction force for laying out the moving optical cable should not exceed 80% of the allowable tension of the moving optical cable. The instantaneous maximum traction must not exceed 100% of the allowable tension of the moving optical cable. The main traction should be added to the reinforcement (core) of the mobile optical cable.

3. The traction end of the mobile optical cable can be prefabricated or produced on site. Directly buried or underwater armored mobile optical cable can be used as a net sleeve or traction end.

4. To prevent twisting and damaging the moving optical cable during the towing process, a swivel should be added between the towing end and the towing rope.

5. When laying the mobile optical cable, the mobile optical cable must be released from the top of the cable reel and maintain a slack arc. There should be no twisting during the laying process of the mobile optical cable, small loops and surges are strictly prohibited.

6. When mechanical traction is used for the deployment of mobile optical cables, centralized traction, intermediate auxiliary traction or decentralized traction should be selected according to factors such as traction length, terrain conditions, and traction tension.

7. The tractor used for mechanical traction shall meet the following requirements:

1) The traction speed adjustment range should be 0~20m/min, and the adjustment method should be stepless speed regulation;

2) The traction tension can be adjusted, and it has automatic stop performance, that is, when the traction force exceeds the specified value, it can automatically send an alarm and stop the traction.

8. The deployment of mobile optical cables must be closely organized and directed by a dedicated person. There should be good communication means during the towing process. It is forbidden for untrained personnel to go to work and work without contact tools.

9. After laying out the mobile optical cable, check whether the optical fiber is in good condition. The end of the mobile optical cable shall be sealed and moisture-proof, and shall not be immersed in water.

1) The optical cable trench should be straight, the bending radius of the turning point should generally not be less than 20m, the bottom of the trench should be flat, without hard ridges, no prominent sharp stones, bricks or other objects.

2) The ridges and corners of the optical cable should be leveled and cut straight to make the transition smoothly.

3) Ensure that the trench depth meets the design requirements.

4) Passing through various unit doorways, village roads, urban sidewalks and other areas that obstruct traffic, appropriate materials should be used to erect temporary bridges or excavate in sections to facilitate the passage of vehicles and pedestrians. Where the cable laying location is very close to various existing underground facilities, it must be very carefully excavated for protection.

5) Backfill 30cm thick crushed soil or fine soil first. It is strictly forbidden to push stones, bricks, frozen soil, etc. into the trench, and should be leveled manually.

6) The backfill should be 10cm-15cm above the ground.

10. Construction requirements for optical cable laying

1) When manually lifting, the optical cable should not be bent less than the specified radius of curvature and the supporting ground should not be pulled too tightly.

2) The optical cable must be laid flat at the bottom of the trench, and must not be emptied or arched; if there is water in the trench, it must be manually pressed into the bottom of the trench when backfilled to ensure that the buried depth of the optical cable meets the requirements.

3) During the laying process, the integrity of the outer sheath of the optical cable must be ensured to avoid sudden impact of the optical cable and scratches on the surface of the outer sheath by other blades. The designated person is responsible for timely inspection of the fiber optic cable sheath, and the damage should be repaired immediately. After the direct buried fiber optic cable is laid, the insulation resistance of the fiber optic cable sheath to the ground should be checked, and then the soil can be returned to 30cm. After 72 hours, the inspection confirms that it meets the quality acceptance standard (10MΩ.km) ), the whole ditch can be returned to the soil, and it is 10-15cm above the ground. The insulation resistance of the optical cable metal sheath to the ground directly affects the life of the optical cable and the communication quality. It is a hard indicator for acceptance and should be paid attention to.

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