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


Electrical installations and protection against electric shock



Reference HD 60364-4-43:2010
Title Low-voltage electrical installations - Part 4-43: Protection for safety - Protection against overcurrent
Project Number 20853
Abstract/Scope IEC 60364-4-43:2008 provides requirements for the protection of live conductors from the effects of overcurrents. IEC 60364-4-43:2008 describes how live conductors are protected by one or more devices for the automatic disconnection of the supply in the event of overload (Clause 433) and short-circuit (Clause 434) except in cases where the overcurrent is limited in accordance with Clause 436 or where the conditions described in 433.3 (omission of devices for protection against overload) or 434.3 (omission of devices for protection against short-circuit) are met. Coordination of overload protection and short-circuit protection is also covered (Clause 435). 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: - Introduction of new informative Annexes B, C and D. - Information concerning flexible cables added to Scope. - Requirements added for overload detection for the neutral conductor for harmonic currents. - Requirement that devices for protection against short-circuit current be capable of making as well as breaking short-circuit current added. - Information added to clarify protection against overload current. - Requirements where devices for protection against overload need not be provided expanded. - Requirements where devices for protection against short-circuit need not be provided expanded. - Requirements for short-circuit current ratings of busbar trunking systems added. The contents of the corrigendum of October 2008 have been included in this copy.


Current Stage code 6060
Current Stage code date 2010-03-26
Current Stage code deadline 2011-03-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 64
Reference Document IEC 60364-4-43:2008 (MOD) + corrigendum Oct. 2008 (EQV)
ICS 29.120.50 - Fuses and other overcurrent protection devices
91.140.50 - Electricity supply systems
Keywords Low-voltage; Safety; Protection;Overcurrent
Note Supersedes HD 384.4.43 S2:2001 + corr. Dec.2005 + HD 384.4.473 S1:1980 (see TC 64 Secretary email dated 2012-11-06 in dataservice)
Special National Condition(s) DE


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2010-03-26 2011-03-01 export to doc file  EN  DE
5099 2010-03-01 2010-05-01  
5061 2010-01-25 2010-03-01  
5091 2008-10-01 2009-10-01  
5061 2008-08-26 2008-10-01  
5060 2008-07-07 2008-07-21 export to doc file  EN
5020 2008-05-02 2008-07-04  
3090 2007-10-12 2007-12-31  
5060 2007-01-15 2007-01-29 export to doc file  EN
5020 2006-08-11 2007-01-12  
1090 2006-08-08 2006-08-11  

Implementation Dates

date of Ratification (DOR) (1) 2010-03-01
date of Availability (DAV) (2) 2010-03-26
date of Announcement (DOA) (3) 2010-09-01
date of Publication (DOP) (4) 2011-03-01
date of Withdrawal (DOW) (5) 2013-03-01


Supersedes HD 384.4.43 S2:2001
HD 384.4.43 S2:2001/corrigendum Dec. 2005
HD 384.4.473 S1:1980
HD 384.4.473 S1:1980/corrigendum Dec. 2005
Superseded by  
Normative reference (6) HD 60269-2:2007
HD 60269-3:2007
EN 60269-4:2009
HD 60364-4-41:2007
corr. July 2007
IEC 60364-5-52:2001
EN 60439-2:2000
IEC 60724:2000
EN 60898 series
EN 60947-2:2006
EN 60947-3:2009
EN 60947-6-2:2003
EN 61009 series
EN 61534-1:2003

(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.