How to connect optical fibers to an optical cable pulling machine

Fiber optic cables should be connected to a pulling machine using the cable's strength members, proper pulling eyes, and secure grips to prevent damage during installation.

Preparation and Safety

Before connecting the fiber optic cable to the pulling machine, ensure you have safety equipment such as gloves and safety glasses to protect against glass shards, and verify that the installation area is stable and dust-free . Inspect the cable for any damage or kinks, and confirm the route is clear and measured to avoid mid-pull splicing .

Using the Strength Members

Fiber optic cables are designed with internal strength members (typically aramid yarn or Kevlar) that bear the pulling load. Never pull the cable by the outer jacket unless the manufacturer explicitly allows it . Exposing a small portion of the strength member by carefully stripping the jacket allows you to attach the pulling hardware securely.

Attaching Pulling Hardware

1. Pulling Eye or Pull Sock: Loop the exposed strength member into a cable pull-eye or mesh pull sock. Double-back and tape or knot the yarn to ensure it is secure .
2. Swivel Connection: Use a swivel pulling eye to connect the cable to the pulling rope or machine. This prevents twisting of the cable during the pull .
3. Cable Grip: For multi-strand or pre-terminated cables, use a rotating cable grip that distributes tension evenly and protects the connectors .

Machine Setup

• Ensure the pulling machine is rated for the cable's maximum pulling tension and that tension control is enabled if available .
• Apply compatible cable lubricant if pulling through conduit or innerduct to reduce friction and prevent damage .
• Maintain the minimum bend radius and avoid sharp turns to prevent fiber breakage .

Pulling Procedure

• Begin the pull slowly, monitoring tension and cable alignment.
• Keep the cable straight and avoid kinks or twists.
• Complete the installation in one continuous pull whenever possible to minimize splices .
• After the pull, inspect the cable for any signs of stress or damage before terminating or splicing . By following these steps—using the strength members, proper pulling hardware, and tension-controlled pulling—you can safely connect optical fibers to a pulling machine and ensure a reliable installation .