IEC 62305-3:2010 Protection against lightning - Part 3: Physical damage to structures and life hazard

International Standard IEC 62305-3 has been prepared by IEC technical committee 81:
Lightning protection.
This second edition cancels and replaces the first edition, published in 2006, and constitutes
a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
1) Minimum thicknesses of metal sheets or metal pipes given in Table 3 for air-termination
systems are assumed as not able to prevent hot-spot problems.
2) Steel with electro-deposited copper is introduced as material suitable for LPS.
3) Some cross-sectional areas of LPS conductors were slightly modified.
4) For bonding purposes, isolating spark gaps are used for metal installations and SPD for
internal systems.
5) Two methods – simplified and detailed – are provided for evaluation of separation
distance.
6) Protection measures against injuries of living beings due to electric shock are considered
also inside the structure.
7) Improved information for LPS in the case of structures with a risk of explosion are given in
Annex D (normative).