What device can be attached to the pulling line to prevent twisting of the fiber-optic cable during installation?

The device that can be attached to the pulling line to prevent twisting of the fiber-optic cable during installation is a break-away swivel. This is an important component in the process of fiber-optic cable installation because fiber-optic cables are sensitive to twisting forces. When cables twist, it can lead to damage, performance degradation, or even breakage of the fibers inside.

A break-away swivel allows the pulling line to rotate freely while maintaining the integrity of the cable. By permitting rotation, it helps to manage the stresses that twisting might exert on the cable during the pulling operation. This feature is particularly crucial when the installation involves navigating bends or corners where the cable might be subject to additional rotational forces.

In contrast, other devices mentioned, like a wire mesh, safety clamp, or locking connector, do not specifically address the issue of cable twisting. A wire mesh might be used for protection but does not prevent twisting. A safety clamp is typically used to secure and stabilize cables instead of addressing twisting, and a locking connector is meant for secure connections between fiber cables rather than to mitigate twisting risks during installation. Therefore, the use of a break-away swivel is the most appropriate solution to prevent twisting of fiber-optic cables.