What phenomenon describes the droop of overhead wires in warm weather or under high loads?

The phenomenon that describes the droop of overhead wires in warm weather or under high loads is referred to as conductor sag. This is a crucial concept in power transmission and distribution systems because as temperatures rise, the materials used in overhead conductors expand. When the conductors are under heavy electrical loads, they generate more heat due to increased resistance, causing even more expansion. Consequently, this results in a noticeable sag, which is particularly important for maintaining safe clearances from the ground and other structures.

Understanding conductor sag is essential for engineers and utility specialists as it directly impacts the design and operational safety of overhead power lines, ensuring that they remain functional and safe in varying conditions.

The other options do not pertain to this specific phenomenon; "Common Interests" pertains to collective goals, "Compatible Vegetation" relates to vegetation management near utility lines, and "Comprehensive Evaluation" suggests a thorough assessment process that does not specifically address conductor behavior. Therefore, the focus on conductor sag aligns precisely with the described physical behavior of wires under specific conditions.