The space adjacent to a lightning protection system that is protected from a direct lightning strike is known as the ? .

The space adjacent to a lightning protection system that is protected from a direct lightning strike is referred to as the "zone of protection." This term specifically denotes the area that benefits from the protective measures integrated into the lightning protection system, such as lightning rods, conductors, and grounding systems.

The concept of a zone of protection comes from engineering principles that evaluate how effectively a lightning protection system can shield structures and areas from the impact of direct lightning strikes. By establishing a particular zone, professionals can determine how far away from the system one must be to minimize the risk of a direct strike. This is crucial for ensuring the safety of personnel and property.

Other terms, while related, do not accurately define this specific area. For instance, "buffer zone" and "protection area" may imply areas of reduced risk but do not encompass the exact definition provided by industry standards for the zone that is actively protected. The term "lightning safety zone" may evoke general concepts of safety during lightning events, but it lacks the specificity needed to describe the geometrical and protective characteristics of the zone adjacent to a lightning protection system.