What is the maximum length of a sag section limited by?

The maximum length of a sag section in power lines is primarily limited by deadends, angle structures, and terrain. Sag sections refer to the vertical curve or dip in a power line between two points where it is supported.

Deadends and angle structures are critical because they are designed to carry the tension and forces applied to the wires. Their placement affects how much sag can occur between them. If the distance between these structures is too long, it can lead to excessive sag, which could create safety hazards or structural failure due to the weight of the line or extreme weather conditions.

Terrain is also a significant factor, as uneven or hilly landscapes can influence the effective sag of a wire. In some cases, the ground structure beneath needs to be considered to ensure proper clearance and safety from obstacles.

The other options relate to concepts that, while important in their contexts, do not specifically define the maximum length of sag sections in the same structural sense. Voltage drop and weather conditions, for instance, are crucial for overall electrical performance and reliability but do not limit the physical length of a sag section like the placement of deadends and angle structures do. Line markings and street signage are safety and regulatory features and have no direct impact on the physical characteristics of sag sections.