What does a conductor sag chart help linemen determine?

A conductor sag chart is a critical tool for linemen that assists in determining proper line tension and sag limits. When installing or maintaining overhead power lines, it is essential to ensure that the conductors are suspended at the correct height and tension to avoid excessive sagging, which can lead to safety hazards or damage to the line and surrounding structures.

The chart provides guidelines on how much a conductor will sag under various load and temperature conditions. By referencing the chart, linemen can accurately calculate the amount of sag for a given span of cable, taking into account factors such as the weight of the conductor and its thermal expansion in response to temperature changes. This ensures that the installation meets safety and operational standards, preventing situations where sagging conductors might come into contact with vegetation, buildings, or other electrical lines.

This tool is essential for maintaining the integrity of the power system and ensuring reliable service delivery, as improper tension and sag can result in line failure or interruptions in power supply.