What is the function of a ground rod in a lightning protection system?

The function of a ground rod in a lightning protection system is fundamentally to ground the lightning protection system. When lightning strikes a structure, the ground rod provides a low-resistance path for the electrical energy to dissipate safely into the Earth. This is crucial as it helps prevent damage to both the structure and its electrical systems by directing the tremendous energy of a lightning strike away from sensitive components.

Ground rods are typically made of conductive materials, such as copper or galvanized steel, and are driven deep into the ground to ensure proper grounding. Effective grounding can significantly reduce the risk of fire and equipment failure that might otherwise occur if lightning energy does not have a safe route to travel. Thus, understanding the role of the ground rod is essential for ensuring the overall safety and effectiveness of a lightning protection system.