Aerial optical cables are optical cables hung on poles.
The overhead optical cable laying method can use the original overhead open wire poles to save construction costs and shorten the construction period.
Aerial optical cables are hung on poles and must be able to adapt to various natural environments.
What are the requirements for laying aerial optical cables? 1) When laying optical cables on flat ground, use hooks for hanging. When laying optical cables on mountains or steep slopes, use binding methods to lay optical cables.
The optical cable connector should be positioned on a straight pole that is easy to maintain, and the reserved optical cable should be fixed on the pole with a reserved bracket.
2) The optical cable in the overhead pole path is required to make U-shaped telescopic bends every 3-5 poles, with approximately 15 meters reserved for every 1 kilometer.
3) The overhead (wall) optical cables are protected with galvanized steel pipes, and the pipe openings are blocked with fireproof mud.
4) Optical cable warning signs should be hung every 4th pole or so on overhead optical cables and in special areas such as across roads, rivers, and bridges.
5) The intersection of the hanging wire and the power line should be protected by a three-prong protective tube, and the extension of each end should not be less than 1 meter.
6) The electric pole cables near the highway should be wrapped with light rods, with a length of 2 meters.
7) In order to prevent the electric current induced by the hanging wire from hurting people, each pole wire is required to be electrically connected to the hanging wire. Each pulling wire position should be installed with a pull-type ground wire. The hanging wire is required to be directly connected with a bushing ring and directly grounded at the terminal. .
2. Requirements for laying optical cables in pipelines 1) Before laying the optical cable, put the sub-hole in the tube hole. Choose 1 hole of the same color sub-tube for the optical cable and always put it through. All the remaining sub-tube openings should be protected by plugs.
2) Considering the manual laying method, in order to reduce the loss of optical cable joints, the pipeline optical cable should be laid in the entire tray. 3) In order to reduce the traction force during laying, the entire optical cable should be laid from the middle to both sides. , and arrange personnel at each manhole for intermediate auxiliary traction.
4) The hole position for the optical cable should meet the requirements of the design drawing. The pipe hole must be cleaned before laying the optical cable in the pipeline.
The remaining length of the sub-hole in the hand hole should be about 15cm above the tube hole.
5) The interface between the sub-tube in the hand hole and the plastic textile network tube is wrapped with PVC tape to prevent sediment from infiltrating.
6) The optical cable is installed in the man (hand) hole. If there is a support plate in the hand hole, the optical cable is fixed on the support plate. If there is no support plate, the optical cable is fixed on the expansion bolt. The expansion bolt requires a hook. Mouth downward.
7) Optical cables should not be bent within 15cm of the outlet hole.
8) Plastic signs are used in each hand hole and on the optical cables and ODF racks in the computer room to indicate the difference.
3. Wall optical cable laying requirements 1) Except for the upper part of the underground optical cable, it is strictly prohibited to lay armored or linoleum optical cable on the wall.
2) When crossing neighborhoods or courtyard passages, the lowest point of the cable should be no less than 4.5 meters from the ground.
3) The hanging thread type adopts 7/2.2, 7/2.6, the support spacing is 8 to 10 meters, and the distance between the terminal fixation and the first middle support isShould be no larger than 5 meters.
4) When the suspension wire is laid horizontally or vertically on the wall, its terminal fixation and the middle support of the suspension wire should comply with the "Acceptance Specifications for Local Network Communication Line Engineering".
5) The fastening screws must be on the same side of the optical cable.
Optical cables should not be laid along the wall with hooks.
When unavoidable, 6) a sleeve should be added to the optical cable for protection.
When the optical cable is laid along the hanging wire protruding from the wall on the indoor floor, the hook distance is 1 meter.
IV. Intra-office optical cable laying requirements 1) Intra-office optical cables should be tied when passing through the wiring rack and turning points (front and rear), and the vertical ascending section should be tied in sections (the section length is not more than 1 meter). The upper and lower walkways or walls should be tied with 2 to 3 circles every 50cm, and the tied parts should be padded with rubber tubes to avoid lateral pressure.
2) When the program of the intra-office optical cable does not change, it should be wrapped with PVC flame-retardant tape for fire prevention treatment, and the cable entry holes must be blocked with fire-proof mud.
3) The office direction and serial number of each terminal should be clearly marked on the terminal board of the ODF rack.
4) The reserved coils for the intra-office optical cables are tied and fixed on the wiring rack or wall, and the base station optical cables can be reserved on the terminal poles outside the base station.
5) Intra-office optical cables are generally led from the hand shaft in front of the office to the optical transmission equipment through the underground cable entry room.
Intra-office optical cables should be hung with signs made in accordance with relevant regulations for easy identification.
6) The optical cable should be placed in a safe location in the cable entry room. When it is in a position vulnerable to external damage, protective measures should be taken.
7) The optical cables in the office should be laid out neatly and beautifully, and the optical cables laid along the upper line shaft should be tied to the upper line reinforcement horizontal iron.
8) Optical cables reserved on the equipment side according to regulations can be left in the transmission equipment room or incoming line room.
If there are special requirements for reserved optical cables, enough should be reserved according to the design requirements.
9) After the optical cable is introduced into the central station, the inlet pipe hole should be blocked to prevent water seepage or leakage.
5. Optical cable ends 1) Sufficient reserved optical cables should be left according to regulations or design requirements.
2) The installation location of the optical cable terminal connector in the equipment room should be stable and safe, away from heat sources.
3) Ended optical cables and single-core soft optical fibers derived from optical cable terminal connectors should be routed in accordance with ODF instructions 4) and protected and bound according to design requirements.
5) The connectors of the single-core soft optical fiber should be inserted into the optical distribution frame (distribution panel) in the order required by the design.
6) The interface end of the optical distribution frame (distribution panel) that is not connected to the flexible optical fiber should be covered with a plastic dust cap.
8) The coiling of soft optical fiber in the rack should be greater than the specified radius of curvature.
9) At the end of the optical fiber distribution frame (ODF), lead out the metal components with copper core PVC sheathed cables and connect them to the protective ground wire.
10) The direction and serial number of the soft optical fiber should be marked in a conspicuous place.
