Iec 62305-3 Pdf [better] -

Preventing physical damage to buildings and structures through a properly designed LPS.

The external system is designed to intercept direct lightning strikes and conduct the energy safely to the ground. It consists of: iec 62305-3 pdf

Protecting human beings from injury due to touch and step voltages in the immediate vicinity of an LPS. Key Components of a Lightning Protection System (LPS) iec 62305-3 pdf