What is one of the methods used to sag wire accurately?

The return-wave method is utilized for accurately sagging wire since it involves measuring the time it takes for a wave to travel along the wire and return after being reflected. This technique allows linemen to precisely determine the length and sag of the wire based on the speed of sound in the material. The method efficiently accounts for factors such as temperature and material properties, which can affect wire tension and sag. By knowing these variables, it helps establish the correct wire sag to ensure proper tension and performance in overhead lines.

Other methods, while they might relate to wiring processes in general, do not offer the same level of precision in determining wire sag. This method's accuracy is critical for maintaining safety and functionality in electrical distribution systems.