1. Optical cable routing
Route retest should be performed before laying the optical cable.
The routing and laying methods should be based on the construction drawing design.
Necessary route changes can be proposed by the supervisor and construction personnel and determined with the consent of the construction unit; for larger route changes above 500m, the design unit should go to the site to negotiate with the supervisor and construction unit, and the construction unit approves them. And fill out the "Engineering Design Change Order".
2. Laying of optical cables 2.1 The laying type, direction and routing of optical cables should comply with the design documents and should not cross power cables. If this is not possible, warning sleeves must be used for protection.
2.2 Optical cables should be laid out straight, without obvious twists and intersections; channel optical cables must be firmly tied, with a straight and tidy appearance, moderate tightness, and the binding spacing should be even and should not be greater than 1.5m; 2.3 In-rack optical cables The layout should be straight, the outlet position should be accurate, the reserved arc length should be consistent, and appropriate binding should be done.
2.4 Each optical cable should have a unified logo at both ends of the cable entry hole and ODF. The logo should indicate the connection location of both ends of the optical cable and comply with the requirements of resource management for optical cable marking.
Label writing should be clear, straight and correct.
Label should be printed and plastic sealed to facilitate routine maintenance.
2.5 The optical cable laying process must comply with the requirements of YD5137-2005 "Local Communication Line Engineering Design Code" and YD5121-2010 "Communication Line Engineering Acceptance Code".
2.6 The overlap and reserved length of the optical cable distribution, laying and installation should comply with the reserved length of the optical cable at the joint, and the reserved length is generally 5~10m.
2.7 When laying wall optical cables, the height above the ground should be no less than 3m, and steel strands should be used for hanging across neighborhoods and courtyard pathways.
2.8 Laying hanging wall optical cablesWhen used, the hanging thread type used for hanging wall optical cables should meet the design requirements.
The spacing between wall supports should be 8-10m, and the distance between the terminal fixture and the first intermediate support should be no more than 5m.
2.9 When laying nailed wall optical cables, line clips must be used on the exterior wall to nail the optical cables; the nailing screws must be on the same side of the optical cables, with an even spacing of 400mm.
2.10 When laying pipeline optical cables, the hole position for laying pipeline optical cables should meet the design requirements; after laying, the optical cables should have no twists, no intersections, no obvious scratches and damage; no work should be done within 150mm of the optical cable outlet hole. Bend processing; the overlap length reserved for optical cable laying on both sides of the optical cable joint should meet the design requirements. After the connection is completed, the remaining length of the optical cable should be coiled and fixed neatly in the manhole; the middle manhole of the pipeline optical cable should be reserved according to the access needs. The length is 8m-10m; optical cable identification signs should be installed on the optical cables in each manhole.
3. Line protection 1. Newly added pull wires must be protected with special warning sleeves.
2. When the hanging overhead wires intersect with the power lines, they should generally pass under the power lines, and the overhead wires that intersect with the power lines should be covered with power protection tubes.
The spacing between hanging wires and power lines should comply with the design and acceptance specifications.
3. When optical cables inevitably cross adjacent building facilities with fire hazards, fire protection measures should be taken.
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