[better] | Iec 62305-3 Pdf

Under this standard, a complete Lightning Protection System is divided into two main categories:

| Class | Rolling Sphere Radius (m) | Mesh Size (m x m) | Typical Application | | :--- | :--- | :--- | :--- | | | 20 | 5 x 5 | Power plants, explosive storage, heritage sites. | | II | 30 | 10 x 10 | Telecom towers, high-occupancy buildings. | | III | 45 | 15 x 15 | Industrial buildings, schools. | | IV | 60 | 20 x 20 | General structures where risk is low. | iec 62305-3 pdf

: Intercept lightning strikes before they hit vulnerable building parts using rods, mesh, or catenary wires. Down-conductor systems Under this standard, a complete Lightning Protection System

: Provide a safe, low-impedance path for lightning current to travel from the roof to the ground. Earth-termination systems | | IV | 60 | 20 x 20 | General structures where risk is low

IEC 62305-3 is more than a document; it is the global language of lightning safety. Whether you are designing a substation, a telecommunications tower, or a residential complex, this standard provides the engineering certainty required to protect lives.