Protection against lightning - Part 1: General principles

IEC 62305-1:2024 provides general principles for the protection of structures against lightning, including their installations and contents, as well as persons.

The following cases are outside the scope of this document:

- railway systems;

- vehicles, ships, aircraft, offshore installations;

- underground high-pressure pipelines;

- pipe, power and telecommunication lines separated from the structure;

- nuclear power plants.

This third edition cancels and replaces the second edition published in 2010. This edition constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous edition:

a) reference to the IEC 62561 series is made in Annex D to provide a link to relevant lightning protection system components according to the IEC 62561 series;

b) risk management introduces the concept of types of loss with public relevance;

c) the concept of frequency of damage that can impair the availability of the internal systems within the structure has been introduced;

d) surge currents due to lightning flashes have been more accurately specified for SPD dimensioning in low-voltage power systems and in telecommunicatio