What is the minimum number of down conductors required for a lightning protection system?

The minimum number of down conductors required for a lightning protection system is typically based on the size and configuration of the structure being protected. Having two down conductors provides a balanced system that allows for better grounding and improves the efficiency of the lightning protection system. This is important because it helps to distribute the electrical charge safely to the ground and minimizes the risk of damage to the structure.

Utilizing just one down conductor may not provide adequate protection, especially for larger or more complex buildings. It can create a single point of failure and may not ensure a path of low resistance for the lightning strike. Therefore, requiring at least two conductors enhances redundancy and improves the overall effectiveness of the lightning protection system. More conductors may be necessary for larger buildings, but the baseline requirement establishes a foundation for operational safety and compliance with standards.