How to coil the fiber optic cable core

Two-core fiber optic cables should be coiled carefully to maintain a minimum bend radius, protect splices, and ensure organized, low-loss fiber management.Preparation Before CoilingStrip and Clean the Fiber: Remove the outer jacket and coating layers carefully using a cable stripper and fiber optic stripper, exposing the bare fiber without causing scratches or nicks ( ).Splice or Terminate: If splicing is required, use a fusion splicer or mechanical splice to join fibers, and protect the joint with a heat-shrink sleeve or protective cover ( ).Calculate Reserved Length: Determine the extra fiber length needed for coiling and future maintenance. Avoid leaving too little or excessive slack ( ).Coiling TechniquesSingle Loop per Splice: After splicing, coil each fiber once in the tray or designated groove to prevent tangling and maintain a neat layout ( ).Middle-First Method: Place the heat-shrink sleeves in the center of the splice tray first, then coil the remaining fiber on both sides. This protects the splice and is ideal for small trays ( ).End-to-End Method: Start coiling from one end, fix the protective sleeve, and then coil the remaining fiber toward the other end. This method is flexible and avoids sharp bends ( ).Figure-Eight for Long Cables: For long cable runs, use a figure-eight pattern to prevent torsion and stress. Each loop should maintain a diameter of at least 30 mm, and the total length per loop can be adjusted according to the tray size ( ).Important Handling GuidelinesMaintain Minimum Bend Radius: Do not bend fibers sharply; the radius should be at least ten times the cable diameter or no less than 30 mm ( ).Avoid Pulling or Twisting: Coiling should be gentle to prevent microbends or fractures.Separate Fibers: Keep the two cores distinct to avoid confusion and ensure easy identification during maintenance ( ).Use Proper Tools: Fiber cleaver, fusion splicer, protective sleeves, and dust-free cloths are essential for safe handling ( ).Final PlacementPlace coiled fibers neatly in splice trays or patch panels.Ensure excess fiber is coiled without tension and follows the natural routing trend.Label fibers if necessary for future identification and maintenance ( ). By following these steps, two-core fiber optic cables can be coiled safely, minimizing signal loss, protecting splices, and ensuring long-term reliability.