How to coil two loops of fiber optic cable splicing

To coil fiber optic cables into two loops inside a splice closure, create two organized, circular loops of fiber with a minimum bend radius, ensuring no stress or kinks, and secure them in the designated tray or holder.

Step-by-

Step Guide1. Prepare the Fiber and Closure Before coiling, ensure all fibers are clean, properly stripped, and spliced using either fusion or mechanical splicing methods. Verify that the splice trays are ready and that the closure type (dome or inline) is suitable for your fiber count and cable configuration.

2. Determine Loop Size Check the manufacturer's recommended minimum bend radius for the fiber type (typically 30–50 mm for single-mode fibers). Each loop should maintain this radius to prevent microbends or signal loss.

3. Form the First Loop Gently coil the first set of fibers into a circular loop inside the splice tray. Start from the splice point and work outward, keeping the fibers flat and untwisted.

Use the tray's built-in guides or clips to hold the loop in place. 4. Form the Second Loop Coil the remaining fiber into a second loop, parallel or concentric to the first, depending on tray design.

Ensure the loops do not overlap tightly or cross each other, which could stress the fibers. Both loops should fit neatly within the tray without forcing the closure to bulge. 5.

Secure the Loops Use the tray's fiber holders, clips, or Velcro straps to secure both loops. Avoid sharp bends or pinching. Make sure the fibers are stable and will not move when the closure is closed or during handling.

6. Close the Splice Closure Once the loops are properly coiled and secured, carefully close the splice closure according to the manufacturer's instructions. Ensure all seals are intact to protect against moisture, dust, and mechanical stress.

Best Practices

Always maintain the minimum bend radius to prevent attenuation or fiber breakage. Keep fibers organized and untangled to allow future access for moves, adds, or changes. Use dome closures when possible for easier fiber management, as they provide a single-end entry and more space for loops.

Label fibers and loops if multiple splices are present to simplify troubleshooting. By following these steps, you can safely coil fiber optic cables into two loops inside a splice closure, ensuring long-term reliability and minimal signal loss.