When is it necessary to use the intermediate pull technique for fiber-optic cable installation?

The intermediate pull technique is specifically utilized in scenarios where the installation of fiber-optic cables involves multiple bends, particularly those that include 90° turns. This technique is critical because bending optical fiber beyond its specified limits can lead to damage or increased signal loss.

When traversing many bends in a cable route, the intermediate pull allows for the management of cable tension and reduces stress on the fiber during installation. By using this technique, installers can ensure that the cable is pulled and strung in a way that minimizes the potential for damage, thus maintaining the integrity of the fiber-optic system.

In contrast, when the cable route is straight or involves only simple curves, there is typically no need for such a technique, as the cable can be installed straightforwardly without the risk of excessive bending. Similarly, aerial installations and areas with low ground clearance may present their unique challenges but do not specifically necessitate the use of the intermediate pull technique unless they also involve complex bends.