How to tie fiber optic cables using a conduit puller

Attach fiber optic cables to a pulling grip or swivel eye, lubricate the cable, and monitor tension carefully while using a conduit puller to safely pull the cable through the conduit. Step 1: Prepare the Conduit and CableBefore pulling, ensure the conduit is clean, free of debris, and of appropriate diameter for the fiber optic cable. Use innerducts if multiple cables will share the same conduit, as this provides smoother pathways and reduces friction.

Assess the conduit route for bends and maintain the minimum bend radius to prevent cable damage. Step 2: Attach the Cable to the PullerUse a Kellems grip (wire mesh pulling sock) or a swivel pulling eye to attach the cable to the pull rope or puller. Never pull the cable by the jacket alone, as this can damage the delicate fibers.

Ensure the grip is snug and secure, allowing the puller to transmit force evenly along the cable's strength member. Step 3: Apply LubricationApply a fiber-cable-rated lubricant at the conduit entrance and at intermediate pull points if needed. Lubrication reduces friction, often lowering pulling tension by 50% or more, and prevents damage to the cable jacket.

Choose a lubricant compatible with both the cable jacket and conduit material. Step 4: Set Up the Conduit PullerUse a hydraulic or motorized conduit puller with load-sensing capabilities to monitor tension. Set the maximum tension limit according to the cable manufacturer's specifications (typically 270–600 lbs for standard fiber cable).

Ensure the puller's electronic load cell or dynamometer is calibrated to provide accurate tension readings. Step 5: Pull the CableMaintain a steady, moderate pulling speed (approximately 50–100 feet per minute) to avoid tension spikes. Monitor the tension continuously and stop immediately if the maximum limit is approached.

Ensure the cable does not bend below its minimum bend radius at any point, especially at conduit entrances and exits. Step 6: Safety ConsiderationsKeep personnel clear of the pull line and never stand directly behind the puller. Do not hoist people or equipment with the puller.

Follow all manufacturer safety instructions for the specific conduit puller being used. By following these steps—preparing the conduit, securely attaching the cable, applying lubrication, monitoring tension, and maintaining proper bend radius—you can safely and efficiently pull fiber optic cables through a conduit using a conduit puller, minimizing the risk of damage and ensuring long-term performance.