What is a necessary feature of a lightning protection system?

A necessary feature of a lightning protection system is earth grounding. Grounding is crucial because it provides a safe pathway for lightning currents to travel into the Earth, significantly reducing the chance of damage to structures and minimizing the risk of injury to occupants. When a lightning strike occurs, the system directs the electrical energy into the ground, effectively dissipating it and preventing it from flowing through the building's materials and systems.

Effective grounding involves using electrodes that are properly installed according to specifications and standards, ensuring they are adequately connected to the lightning protection system. This isn't merely a precaution; it's a fundamental aspect of any lightning protection strategy, making it essential for the safety of the structure and its inhabitants.

While other features may contribute to a lightning protection system's effectiveness, earth grounding is the foundational element that ensures any lightning strike is safely managed.