Live electrical power lines, data feeds, and telecommunication lines cannot be directly grounded. They must be integrated into the equipotential network using coordinated Class I (Type 1) lightning current SPDs at the building boundary. Separation Distance (
: Designed to intercept lightning strikes and safely conduct the current to the earth. Air-termination system : Rods or mesh designed to catch the strike. Down-conductor system iec 62305-3 pdf
Direct wiring connections for inert metal structures (e.g., steel beams, pipes). Air-termination system : Rods or mesh designed to
Verify low-impedance paths across all joints, roofs, and down-conductors. Live electrical power lines
Conducted annually to check for loose connections, corrosion, or structural changes to the building.
A core practical application of IEC 62305-3 is designing the air-termination system, and the 2024 edition places a strong emphasis on the correct application of the three accepted methods. The choice of method depends on the structure's shape, size, and height.