direct bury fiber optic cable
Direct burial fiber optic cable can be directly buried in the ground. It is designed for direct burial installation without any additional protective cover. As a professional direct buried fiber optic cable manufacturer & supplier, we specialize in designing, manufacturing direct buried fiber optic cable, and providing customized services for our customers！
- Convenient construction and installation
- Excellent material and reliable technology
- Competitive price
- OEM Service can be provided
- 100% quality assurance
Installed Underground and No Need for Poles
Direct buried fiber optic cable
Direct burial fiber optic cable is an optical cable with steel tape or steel wire armor. It has the performance of resisting external mechanical damage and soil erosion, and can be directly buried in the ground. Direct burial is the most convenient way to lay optical cables, and it also saves the cost of pipeline and overhead installation. Generally speaking, direct-buried optical cables have good mechanical and temperature properties, compression resistance and flexibility, and are suitable for direct-buried construction.
Direct buried fiber optic cable For Sale
Direct burial fiber optic cable is designed for direct burial installation, and it is usually protected with double sheaths and Kevlar yarns. Direct burial cables differ from outdoor-rated cables in the way that they are designed to be buried under dirt, without the use of conduit. They may be exposed to harsh environmental conditions, such as changes in soil temperature and moisture. Waterproofing the cables helps prevent moisture damage. Direct burial cables are much stiffer than indoor cables, as they are usually built with splines inside to reinforce their center so that they are not easily crushed. Direct burial cables have the advantage of being replaced less frequently and are better able to maintain integrity even in the event of natural disasters. Armored direct burial optic cable is ideal for installations that require a rugged armored fiber cable to be buried directly in the ground or for installation in conduit where rodents are still able to get inside.
Custom Direct Buried Fiber Optic Cable
We offer an assortment of direct burial multimode fiber optic cables that won’t let you down. Whether you are looking for 50-micron OM3 or OM2 cable or something else, whether choose six-fiber or 12-fiber direct-burial cables, you can find what you need at Bonelinks.
We go beyond your expectation. Want to make customized direct bury fiber optic cables? With flexibility and expertise being at the core of our comprehensive product customization service, we have a set of processes and services to meet your special requirements. Based on your need and our extensive experience. You name it, we make it!
Direct burial is the most common approach in urban areas. It is a laying method in which the optical cables are directly buried underground by digging and slotting. This method does not require poles or underground duct. Therefore, the current long-distance trunk optical cable line project and the local transmission network optical cable line mostly adopt the direct burial laying method in the suburbs. Directly buried optical cables are widely used in subways, tunnels, long-distance communications, inter-office communications networks, metropolitan area networks (MAN), local area networks (LAN), outdoor access networks, telecommunications, video, data transmission, cable TV, etc.
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When performing underground cable installation, there are two methods that can be used. The first method involves placing the cable into a buried duct, and the second involves burying the cable directly underground.
Fiber optic cable installation should meet the following requirements:
1. Avoid areas with strong acid and alkali corrosion or severe chemical corrosion without corresponding protective measures, and avoid termite-hazardous areas and areas affected by heat sources or areas that are prone to external damage.
2. The optical cable should be laid in the trench, and the surrounding area of the optical cable should be covered with soft soil or sand layer with a thickness of not less than 100mm.
3. The entire length of the optical cable should be covered with a protective plate with a width of not less than 50mm on both sides of the optical cable. The protective plate should be made of concrete.
4. If the location is located in places where excavation is frequent, such as urban access roads, eye-catching marking strips can be laid on the upper layer of the protection board.
5. In the digital locations located on the outskirts of the city or in the open area, obvious azimuth signs or stakes should be erected at linear intervals of about 100mm along the optical cable path, at the turning points or at the joints.
6. When designing in non-frozen soil areas, the cable sheath to the foundation of the underground structure shall not be less than 0.3m, and the depth from the cable sheath to the ground shall not be less than 0.7m; When it is located on the roadway or cultivated underground, it should be properly deepened and not less than 1m in height.
7. When laying in permafrost areas, it should be buried below the permafrost layer. When it cannot be buried deeply, it can be buried in a dry permafrost layer with good soil drainage or back soil, and other measures to prevent damage to the optical cable can also be taken.
8. When the directly buried optical cable line crosses the railway, highway or street, it should wear a protective tube, and the protection range should exceed 0.5m above the roadbed, both sides of the street and the side of the drainage ditch.
9. When the optical cable laid directly buried is introduced into the structure, a protective tube should be installed at the penetrating slope hole, and the tube mouth should be blocked by water blocking.
10. The clear distance between the connector of the directly buried optical cable and the adjacent optical cable shall not be less than 0.25m; the joint positions of the parallel optical cables should be staggered from each other, and the clear distance shall not be less than 0.5m, and the position of the connector on the sloping terrain shall be horizontal. For the optical cable joint of the loop, it is advisable to leave a spare way to lay the optical cable at the local section starting from about 1000mm on both sides.
When direct burying fiber optic cable, special consideration must be taken in regard to the cable’s minimum bending radius, and maximum pulling strength. Further considerations include the installation temperature and preventing cables twist during the installation. Fiber optic cables should be buried beneath the frost line. This depth may vary depending on the geographical location of the installation.
Direct buried fiber cable is often used where aerial suspension or duct installation is impossible. In a direct-buried installation, the fiber optic cable is generally buried at least 24 inches beneath the surface to protect it from potential damage.
The cable is typically buried using special equipment, such as a cable plow or a trencher. Proper installation techniques and materials, such as backfilling and sand, are essential to ensure adequate protection and operation of cables.
Cable Depth: The depth to which buried cables can be placed will vary depending on local conditions, such as “freeze lines” (the depth to which the ground freezes each year). It is recommended to bury fiber optic cables to a deep/coverage of at least 30 inches (77 cm).
The best way to locate a fiber optic cable is to insert the cable pole into the conduit, then use an EMI locating device to connect directly to the cable pole and track the signal, which, if done correctly, can provide a very accurate location.
Yes. We have Fujikura, Corning SMF 28e, and other brands fiber to choose from.
Yes. As long as we confirm the Pantone color code, we can produce the sheath color you request.
Yes. We will have a dedicated process engineer to interface with you to understand the specific situation and give our production advice.
Yes. We can print company information or logos on fiber optic cables upon request.
The minimum order quantity of fiber optic cable is 1km. Because the outside diameter needs to be adjusted before producing.
This process will waste dozens of meters of raw material.
Under 100 km, it takes 4-5 days to produce. under 500 km, it takes 7-10 days to produce.
All fiber optic cables will come with a test report. If you encounter any quality problems, we replace them with new ones free of charge.
We have a special laboratory for high temperature, salt spray and vibration testing.
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