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



Reference HD 60364-4-42:2011
Title Low voltage electrical installations - Part 4-42: Protection for safety - Protection against thermal effects
Project Number 22294
Abstract/Scope IEC 60364-4-42:2010 applies to electrical installations with regard to measures for the protection of persons, livestock and property against: - thermal effects, combustion or degradation of materials, and risk of burns caused by electrical equipment, - flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity, and - the impairment of the safe functioning of electrical equipment including safety services. This third edition cancels and replaces the second edition, published in 2001, and constitutes a technical revision. The main changes with respect to the previous edition are listed below: - The scope now includes protection against all thermal effects and flames in case of a fire hazard being propagated from electrical installations to other fire compartments segregated by barriers which are in the vicinity. - Requirements associated with escape routes for evacuation in an emergency have been expanded/modified. - Requirements associated with the nature of processed or stored materials have been expanded/modified. - Requirements associated with combustible constructional materials have been expanded/modified. - Requirements associated with fire propagating structures have been modified slightly. - New requirements for the selection and erection of installations in locations which might endanger precious goods have been added. - Protection against overheating now includes space heating appliances.


Current Stage code 6060
Current Stage code date 2011-03-18
Current Stage code deadline  
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 64
Reference Document IEC 60364-4-42:2010 (MOD)
ICS 29.120.50 - Fuses and other overcurrent protection devices
91.140.50 - Electricity supply systems
Keywords Low voltage; Protection; Safety; Thermal effect
Note Supersedes HD 384.4.42 S1:1985 + A1:1992 + A2:1994 + HD 384.4.482 S1:1997 (see email from TC 64 Secretary dated 2012-11-06 in dataservice) * Incorporates FprAA (common modifications)
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2011-03-18   export to doc file  EN  FR
5099 2011-02-14 2011-04-14  
5061 2010-06-23 2010-09-01  
5060 2010-05-04 2010-05-15 export to doc file  EN
5020 2010-02-26 2010-04-30  
3090 2009-08-14 2009-12-31  
5060 2009-07-27 2009-08-10 export to doc file  EN
5020 2009-02-20 2009-07-24  
1090 2009-02-17 2009-02-20  

Implementation Dates

date of Ratification (DOR) (1) 2011-02-14
date of Availability (DAV) (2) 2011-03-18
date of Announcement (DOA) (3) 2011-08-14
date of Publication (DOP) (4) 2012-02-14
date of Withdrawal (DOW) (5) 2014-02-14


Supersedes HD 384.4.42 S1:1985
HD 384.4.42 S1:1985/A1:1992
HD 384.4.42 S1:1985/A2:1994
HD 384.4.482 S1:1997
Superseded by  
Normative reference (6) IEC 60332 series
HD 60364-4-41
HD 60364-5-51
EN 60598-2-24:1998
IEC 61084 series
EN 61386 series
EN 61534 series
EN 61537:2007

(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.