TC 81

Lightning protection

 

Detail

Committee
Working Groups
Project Leader

Current

Status

Frcst Pub

Date

Stability

Date

TC 81MT 21Mr Norbert Frigyes SzedenikACD2021-112026

History

Stage
Document
Downloads
Decision Date
Target Date
AMW
81/475/RR PDF file 86 kB
2015-05-07 
1CD
81/476/CD PDF file 2697 kB
2015-05-082015-05
A2CD
81/498/CC Word file 545 kB
PDF file 1086 kB
2015-11-272015-10
2CD
81/518/CD PDF file 2246 kB
2016-04-012016-04
CDM
81/531/CC Word file 2148 kB
PDF file 1149 kB
2016-07-292016-07
CDM
81/531A/CC PDF file 1060 kB
Word file 1189 kB
2016-07-292016-07
ACDV
2017-07-242017-07
TCDV
2017-07-252017-08
CCDV
81/571/CDV
PDF file 2405 kB
2017-09-152017-09
CCDV
81/571(F)/CDV PDF file 3263 kB
2017-09-152017-09
PRVC
2017-12-082017-12
AFDIS
81/583/RVC PDF file 844 kB
Word file 1128 kB
2018-02-162018-07
AFDIS
81/583A/RVC PDF file 1820 kB
Word file 1140 kB
2018-02-162018-07
TFDIS
2018-06-262018-07
DECFDIS
2018-08-072018-08
RFDIS
2018-09-052018-08
CFDIS
81/603/FDIS PDF file 6572 kB
PDF file 6664 kB
2018-10-052018-11
PRVD
2018-11-162018-11
NFDIS
81/611/RVD PDF file 939 kB
2018-11-302018-11
A2CD
81/611A/RVD PDF file 966 kB
2019-10-252020-12
3CD
 2020-12

Abstract

IEC 62305-3:2018 provides the requirements for protection of a structure against physical damage by means of a lightning protection system (LPS), and for protection against injury to human beings due to touch and step voltages in the vicinity of an LPS (see IEC 62305-1).

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:
Minimum thicknesses of metal sheets or metal pipes are given in Table 4 for air-termination systems where it is necessary to prevent hot-spot problems. Maximum temperature rises ΔT (K) and time duration t50 (s) for different thickness and long strokes are also given.
Cross reference to IEC 62561 (all parts) is made in choosing components of the LPS.
The application of two methods – general and simplified – for separation distance calculation is clarified.
Some changes to the requirements for continuity of steel reinforcement are made.
Revision of positioning of air-termination conductors according to the three accepted methods and a more precise description of the methods for positioning of the air-termination systems, according to the complexity of structures to be protected, are made. The main text has been simplified, Annex A has been deleted and all detailed information has been moved to Annex D.
Information on the protection of green roofs is introduced in Annex D.
Information on the protection of protruding parts on facades of tall buildings is introduced in Annex D.

Project

IEC 62305-3 ED3

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

 

 

Associated Documents:

81/616/RQ

PDF file 797 kB
81/455/DC

PDF file 4935 kB