Construction specification for drop cable

- Jul 31, 2020-  


1. Before laying the home fiber optic cable, the type of user's residential building, environmental conditions and the routing of existing cables should be considered. At the same time, it is necessary to comprehensively judge the economics and safety of construction, the convenience of future maintenance and user satisfaction.

2. The existing concealed pipes should be used as much as possible to lay the optical fiber cables. For residential buildings without concealed pipes or the concealed pipes are not available, it is advisable to lay the butterfly-shaped drop optical cables by laying bellows in the building.

3. For residential buildings with vertical wiring bridges, it is advisable to install corrugated pipes and floor crossing boxes in the bridges for putting butterfly-shaped drop cables. If there is no space to install the corrugated pipe in the bridge, the winding pipe should be used to wrap the laying of the butterfly-shaped drop-in optical cable to protect the optical cable.

4. Because the butterfly-shaped incoming optical cable cannot be immersed in water for a long time, it is generally not suitable for laying directly in underground pipelines.

5. The minimum bending radius of the butterfly-shaped drop cable should be in accordance with: during the laying process it should not be less than 30mm; after fixing it should not be less than 15mm.

6. Under normal circumstances, the traction of the butterfly-shaped drop cable should not exceed 80% of the allowable tension of the optical cable; the instantaneous maximum traction must not exceed 100% of the allowable tension of the optical cable, and the main traction should be added to the reinforcing member of the optical cable.

7. Optical cable trays should be used to carry butterfly-shaped drop-in optical cables, and cable trays should be used when laying optical cables so that the optical cable trays can rotate automatically to prevent the optical cables from being entangled.

8. In the process of laying the optical fiber cable, strictly pay attention to the tensile strength and bending radius of the optical fiber to prevent the optical fiber from being twisted, twisted, damaged and stepped on.


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