What is the minimum recommended bend radius under pulling tension for fiber optic cables?

The minimum recommended bend radius under pulling tension for fiber optic cables is more than 20 times the cable diameter. This guideline is crucial because fiber optic cables are highly sensitive to bending; tight bends can lead to increased attenuation and potential damage to the optical fibers inside.

When cables are pulled, they experience tension, and ensuring a bend radius that exceeds the recommended specifications helps to maintain signal integrity and reduce the risk of permanent deformation. By adhering to a bend radius greater than 20 times the cable diameter, installers can minimize the risk of microbends and macrobends, which can degrade performance and lead to signal loss.

This recommendation is particularly important during installation, when cables are subject to various structural stresses. Therefore, maintaining a larger bend radius contributes to the longevity and reliability of the fiber optic system.