According to NFPA 780-2011, what is the minimum distance the air terminal should be above the area it protects?

The appropriate minimum distance for the air terminal above the area it protects, as specified in NFPA 780-2011, is indeed 10 inches. This guidance ensures that the air terminal is properly positioned to intercept lightning strikes effectively and provide a safe pathway for the resultant electrical discharge to ground.

By maintaining this distance, the air terminal can effectively disperse the electric charge away from structures and individuals within the protected area, which is critical for safety and the performance of the lightning protection system. It is important to adhere to these standards to minimize the risk of damage during a lightning event.