Why is understanding sag important for linemen?

Understanding sag is vital for linemen primarily because it ensures proper clearance and safety. Sag refers to the downward curve that occurs in a cable or wire due to its own weight and the tension applied. When installing and maintaining power lines, it is essential to account for sag to prevent the lines from being too close to the ground, which can create hazards for people, vehicles, and structures beneath the lines.

Proper clearance is necessary not only for safety but also to meet regulatory requirements that ensure the lines are at a safe height above roadways, buildings, and other objects. Failure to maintain adequate clearance can lead to electrical hazards and increase the risk of accidents. Therefore, by understanding and calculating sag correctly, linemen can ensure that power lines are installed safely and remain secure over time, providing reliable electricity and preventing potential dangers.