Ordinary optical cable for blown cable

Standard optical fiber cables can be installed using blown cable techniques, but cable design, stiffness, and duct conditions significantly affect performance.Compatibility of Ordinary Optical CablesOrdinary optical fiber cables—including uni-tube, multi-tube, unarmored, and armored cables—can be installed in pre-installed ducts using blowing or jetting methods with compressed air . The process involves pushing the cable a short distance with a tractor mechanism and then using high-speed air to “float” the cable inside the duct, reducing friction and allowing longer installation distances .Key ConsiderationsCable Stiffness and Flexibility: Stiffer cables are preferable for straight duct runs as they resist buckling and can be blown faster, while more flexible cables are better for routes with multiple bends or undulations .Outer Jacket Material: The cable's outer sheath affects friction and durability during blowing. A smooth, robust jacket reduces the risk of damage.Crash Testing: Before full installation, a short test push (5–10 meters) is recommended to determine the maximum pushing force without damaging the cable .Microduct Size: Ordinary cables must fit comfortably within the microduct, leaving enough space for air to flow around the cable to facilitate the floating effect .Differences from Purpose-Built Blown FiberWhile ordinary cables can be used, air-blown fiber cables are specifically designed for this method, often with smaller diameters, optimized stiffness, and enhanced flexibility to maximize blowing distance and reduce installation effort . Using standard cables may limit the achievable length per blow and require careful planning to avoid excessive friction or buckling.Practical TipsEnsure ducts are clean and free of sharp bends or obstructions.Use proper air pressure and pushing force to avoid damaging the cable.Consider lubricants or air-assisted techniques to reduce friction in longer or complex routes .For long installations, cascading multiple blowing devices can extend the distance achievable with ordinary cables . In summary, ordinary optical fiber cables can be installed using blown cable methods, but careful attention to cable properties, duct conditions, and installation technique is essential to ensure a successful deployment. For optimal performance, purpose-designed blown fiber cables are generally recommended for longer or more complex routes.