When pulling fiber optic cables, it is important to connect a pulling line onto ____________.

When pulling fiber optic cables, it is crucial to connect a pulling line onto strength members of the cable, such as the aramid yarn or steel strand. This is because strength members are specifically designed to bear tension during installation and protect the optical fibers from mechanical stress and damage. Connecting to these robust elements ensures that the force applied during pulling does not compromise the integrity of the optical fibers or other delicate components of the cable.

The optical fibers themselves are sensitive and can easily be damaged by excessive tension, which is why they should never be directly connected to the pulling line. Similarly, attaching the pulling line to weak points or the protective sheathing would not provide adequate support for the forces involved in pulling the cable, risking potential failure or damage to the cable system. Therefore, using strength members for the pulling line is the best practice in fiber optic cable installation.