International Standards and Conformity Assessment for all electrical, electronic and related technologies



Reference EN 62305-2:2012
Title Protection against lightning - Part 2: Risk management
Project Number 22661
Abstract/Scope IEC 62305-2:2010(E) is applicable to risk assessment for a structure due to lightning flashes to earth. Its purpose is to provide a procedure for the evaluation of such a risk. Once an upper tolerable limit for the risk has been selected, this procedure allows the selection of appropriate protection measures to be adopted to reduce the risk to or below the tolerable limit. 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) Risk assessment for services connected to structures is excluded from the scope. 2) Injuries of living beings caused by electric shock inside the structure are considered. 3) Tolerable risk of loss of cultural heritage is lowered from 10-3 to 10-4. The value of tolerable risk of loss of economic value (RT = 10-3) is introduced, to be used when data for cost/benefit analysis are not available. 4) Extended damage to surroundings structures or to the environment is considered. 5) Improved equations are provided for evaluation of: - collection areas relevant to flashes nearby a structure, - collection areas relevant to flashes to and nearby a line, - probabilities that a flash can cause damage, - loss factors even in structures with risk of explosion, - risk relevant to a zone of a structure, - cost of loss. 6) Tables are provided to select the relative amount of loss in all cases. 7) Impulse withstand voltage level of equipments was extended down to 1 kV.


Current Stage code 6060
Current Stage code date 2012-05-18
Current Stage code deadline 2013-03-19
Deadline date for vote 2012-07-05


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IEC Technical Body IEC/TC 81
Reference Document IEC 62305-2:2010 (MOD)
ICS 29.020 - Electrical engineering in general
91.120.40 - Lightning protection
Keywords Lightning; Protection; Risk management
Note 2012-02-14 - Publication editing allocated to * Supersedes EN 62305-2:2006 + corr. Nov.2006
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-05-18 2013-03-19 export to doc file  EN  FR  DE
5099 2012-03-19 2012-04-16  
5060 2012-02-13 2012-03-05 export to doc file  EN
5020 2011-09-09 2012-02-10 export to doc file  EN  DE
3090 2011-07-05 2011-07-22  
5091 2011-02-17    
5060 2010-11-08 2010-12-20 export to doc file  EN
5020 2010-09-03 2010-11-05  
3090 2010-04-02 2010-06-10  
5060 2010-02-22 2010-03-08 export to doc file  EN
5020 2009-09-18 2010-02-19  
1090 2009-09-15 2009-09-18  

Implementation Dates

date of Ratification (DOR) (1) 2012-03-19
date of Availability (DAV) (2) 2012-05-18
date of Announcement (DOA) (3) 2012-09-19
date of Publication (DOP) (4) 2013-03-19
date of Withdrawal (DOW) (5) 2014-01-13


Supersedes EN 62305-2:2006
EN 62305-2:2006/corrigendum Nov. 2006
Superseded by  
Normative reference (6)  

(1) Date of ratification (dor) date when the Technical Board notes the approval of an EN (and HD for CENELEC), from which time the standard may be said to be approved

(2) Date of availability (dav) date when the definitive text in the official language versions of an approved CEN/CENELEC publication is distributed by the Central Secretariat

(3) Date of announcement (doa) latest date by which the existence of an EN (and HD for CENELEC), a TS or a CWA has to be announced at national level

(4) Date of publication (dop) latest date by which an EN has to be implemented at national level by publication of an identical national standard or by endorsement

(5) Date of withdrawal (dow) latest date by which national standards conflicting with an EN (and HD for CENELEC) have to be withdrawn

(6) This list of normative references is purely indicative. The only official list of normative reference is the list of the published standard.