How to tie and pull the optical cable in the middle

When pulling an optical fiber cable from the middle, always use the cable's strength members, maintain proper tension, and prevent twisting using a figure-8 loop.

Preparing the Cable

• Do not pull on the fiber itself; always use the Kevlar aramid yarn or fiberglass rod strength members inside the cable to bear the load .
• Check the cable length to ensure it is sufficient for the run, minimizing the need for splicing .
• Inspect the installation path for sharp edges, rocks, or obstacles that could damage the cable .
• Use proper lubricants if pulling through conduit, ensuring compatibility with the cable jacket .

Tying the Cable

• Attach a pulling eye or braided mesh to the strength members at the midpoint. This distributes tension evenly and prevents stress on the fibers .
• For pre-terminated cables, protect connectors with tape or a mesh sleeve to maintain a slim profile and prevent damage .
• Use a swivel or breakaway pulling eye if available to prevent twisting during the pull .

Pulling Technique

• Pull from the middle out to both ends for long runs, ensuring tension is monitored on both sides .
• Maintain a straight pull; avoid pushing the cable, which can exceed bend radius and damage fibers .
• Use figure-8 loops on the ground for long cables (40m or longer) to prevent twisting. The loop size is typically 2–4 meters depending on cable stiffness .
• Monitor tension continuously and do not exceed the manufacturer's maximum pulling load .

Additional Tips

• Clamp vertical runs at intervals to support the cable weight and prevent long-term stress .
• Communicate along the installation path if multiple personnel are involved to coordinate the pull and prevent sudden jerks .
• Avoid sharp bends; respect the minimum bend radius both during and after installation .
• Test the cable after installation using an OTDR or Visual Fault Locator to ensure no hidden damage occurred during the pull . By following these steps, you can safely tie and pull an optical fiber cable from the middle while minimizing the risk of fiber breakage, excessive tension, or long-term signal degradation.