What term defines the cable used to assist in the installation of overhead conductors?

The term that accurately defines the cable used to assist in the installation of overhead conductors is "pulling rope." This term specifically refers to a durable rope or cable engineered to pull conductors into place during the installation process. Pulling ropes are essential in ensuring that the conductors are positioned correctly and efficiently across the spans between poles or structures, minimizing potential sagging or misalignment that can occur during installation.

In contrast, the other terms relate to different tools or methods and do not serve the same purpose in the context of overhead conductor installation. A guide line typically refers to a stabilizing line that helps control the position of a structure or an object during installation but doesn't directly pull the conductor. A support chain is generally used for anchoring or securing loads rather than pulling conductors. A string line is often used in construction for layout purposes, such as marking lines or leveling, but it is not primarily associated with the pulling of conductors. Thus, the focus on the specific function of a pulling rope makes it the correct term for this scenario.