There are many problems with optical cables that need our attention. In order to ensure the safety of optical cables, the reserved optical cables should be kept in the man (hand) hole of the communication pipeline as much as possible. Reserved, the connector is reserved for long press 10 meters/side. In order to facilitate maintenance, when laying the cable, the joint well should be 1#, and the order should be analogized. Every hand hole that is a multiple of 5, 10, 15...5 should be reserved for 20m.
(1) Before starting construction, the construction unit should carry out a quantitative count and visual inspection of the specifications and programs of the optical cables and equipment transported to the construction site. If any abnormality is found, the inspection should be focused. Optical characteristics and electrical characteristics should also be tested for optical cables and connectors.
(2) Check that the specification, program and manufacturing length of the single-disk optical cable should meet the requirements specified in the order contract.
(3) When the optical cable is inspected at the beginning, the end of the outer end of the optical cable should be checked, and a conspicuous note should be made on the cable reel. The other identification methods of the optical cable end shall comply with the following requirements: Facing the optical cable section, when the colored optical fibers are arranged clockwise, it is the A end, otherwise it is the B end.
(4) On-site inspection of optical fiber attenuation constant and optical fiber length.
(5) After the single-reel optical cable inspection is completed, the sealed packaging of the optical cable end and the optical cable reel packaging should be restored.
(6) Optical fiber connectors should have good repeatability and interchangeability. The length of the pigtail should meet the design requirements and the outer skin should not be damaged. The parameters of the pigtail shall comply with the contract. The wear and tear of the connector shall be in accordance with the contract.
Field fiber optic cable
(1) The optical cables in the newly built pipelines are protected by hard plastic pipes, and the length of the plastic pipes laid at one time is based on the principle of facilitating the passage of the optical cables.
(2) The bending radius of the optical cable should not be less than 10 times the outer diameter of the optical cable, and not less than 20 times during the construction process.
(3) The traction force for laying the optical cable should not exceed 80% of the allowable tension of the optical cable, the instantaneous maximum traction force should not exceed 100% of the allowable tension of the optical cable, and the traction force should be added to the strength member (core) of the optical cable. There should be no twist in the process of laying the optical cable, and it is strictly forbidden to make small circles, surges and other phenomena.
(4) The laying of the optical cable must be closely organized and commanded by a special person, and there should be good communication means during the pulling process. After the optical cable is laid, check whether the optical fiber is in good condition. The end of the optical cable should be sealed and moisture-proof, and should not be soaked in water.
(5) When the optical cable penetrates into the pipeline or the pipeline turns or has intersections, a guiding device or a horn protection tube should be used, and the outer sheath of the optical cable should not be damaged. Word segment traction.
(6) The optical cable is placed on the specified bracket, and an appropriate margin should be left to prevent the optical cable from being stretched too tightly. The optical cable in the person (hand) hole where the connector is located shall meet the design requirements after being reserved. The reserved optical cable should be properly placed in the specified position.
(7) The reservation of the overhead optical cable is reserved at the joint rod, and the poles on both sides are properly reserved, and the reserved length is 15-20m; for the overhead optical cable crossing the river, the remaining 15-20m on both sides of the river with a river width greater than 30m 20m, and 15-20m is left for every 10 pole-stop optical cables in the overhead section. The optical cable crossing the river is left on the adjacent pole of the first pole on the river bank: the joint should be left on the joint pole, and each joint point should be left with 10m.
For the installation of overhead optical cable splice boxes, the splice boxes are all set on the poles (joint poles), and there is no suspended joint between the two poles; the joint poles should be avoided as far as possible in places where construction and maintenance are difficult, such as isolated poles in the river and hilltop poles; the joint box should be Securely fastened to the joint rod.
