What course must conductors maintain to ensure proper functionality?

The correct choice emphasizes the importance of maintaining a horizontal or downward course for conductors in lightning protection systems. This orientation is critical because it allows for effective drainage of electrical currents that may occur during a lightning strike.

When conductors are positioned horizontally or angled downward, they reduce the risk of potential hazards associated with lightning strikes, such as arcing or the creation of high voltage paths that could damage structures or pose safety risks to people. These orientations also facilitate proper grounding, ensuring that electrical energy from a lightning event can be safely conducted into the ground.

Furthermore, having conductors maintain this specific course also aids in minimizing electromagnetic interference and optimizing the overall efficiency of the lightning protection system. Properly installed conductors adhering to these guidelines contribute significantly to the reliability and safety of the lightning protection installation.