Coiling optical cables in a figure-eight pattern prevents twisting and kinking, ensuring smooth pulls and safe handling.

Step-by-Step Guide

1. Prepare the Surface: Lay a clean tarp or plastic sheet on the ground to protect the cable from dirt and damage. Ensure the area is free of sharp objects or rocks that could damage the sheath during coiling . 2. Determine Loop Size: The size of each loop in the figure-eight depends on the cable's stiffness and diameter. For most fiber optic cables, loops of 6–12 feet (2–4 meters) are common . Larger loops reduce mechanical stress and prevent kinking. 3. Lay the Cable in a Figure-Eight:

• Pull the cable out of the reel or conduit.
• Form a large “8” on the ground, making sure one side of the 8 introduces a half-twist and the other side removes it. This prevents overall twisting along the cable length .
• Slightly offset each successive “8” to minimize mechanical pressure on the cable .
• Pull slowly and carefully to avoid kinks. 4. Midspan or Long Pulls (Optional): For long runs, you may perform a midspan pull:
• Place the reel at the midpoint of the span.
• Pull one end through the conduit to one side.
• Figure-eight the remaining cable on the ground with the end on top.
• Pull the second end through the conduit to the other side . 5. Prepare for the Next Pull: Once the cable is coiled, pick up the figure-eight pile and flip it over so the end to be pulled next is on top. Attach the cable to the pull rope using a swivel pulling eye to continue the installation .

Best Practices

• Avoid sharp bends or turn-backs; maintain smooth curves.
• Use protective material if the cable will remain outside for extended periods.
• Minimize mechanical pressure at crossing points, especially for armored cables .
• Pull slowly and evenly to prevent kinks or damage to the fiber. By following these steps, the figure-eight coiling method ensures that optical cables remain untwisted, reducing the risk of damage during installation or storage .