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



Reference HD 384.4.43 S2:2001
Title Electrical installations of buildings - Part 4: Protection for safety - Chapter 43: Protection against overcurrent
Project Number 11806
Abstract/Scope Sets out general rules for protection of live conductors against overload and short circuit. Specifies the features of various protective devices and necessary coordination between conductors and overload protective devices. Formula for calculation of time in which a given short-circuit current will raise a conductor from the highest admissible temperature in normal duty to its limit temperature. Enumerates requirements for coordination of overload and short-circuit protection. Note: For details of -low-voltage circuit breakers, see EN 60974-2 -low-voltage fuses, see EN 60269 -for coordination of low-voltage direct-online (full voltage) motor starters with short-circuit protective devices, see EN 60974-1 -for current-carrying capacities of conductors for electrical installations of buildings, see IEC 60364-5-523.


Current Stage code 6060
Current Stage code date 2001-11-29
Current Stage code deadline 2002-06-01
Deadline date for vote  


Order Voucher  


IEC Technical Body IEC/TC 64
Reference Document IEC 60364-4-43:1977 (MOD) + A1:1997 (MOD)
ICS 29.120.50 - Fuses and other overcurrent protection devices
91.140.50 - Electricity supply systems
Keywords Building; Electrical installation; Protection; Overcurrent; Safety
Note Corrigendum to HD issued December 2005 * Superseded by HD 60634-4-43:2010
A-Deviation(s) DK
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2001-11-29 2002-06-01 export to doc file  EN
5099 1999-08-01 2001-12-01  
5062 1999-06-10 1999-08-01  
5020 1999-03-01 1999-05-31  
1599 1998-07-07 1998-12-31  
1560 1998-05-18 1998-08-01  
1520 1997-11-25 1998-02-28  
1099 1997-10-24 1997-11-24  
1090 1997-10-13    
1021 1997-10-13 1997-11-14  

Implementation Dates

date of Ratification (DOR) (1) 1999-08-01
date of Availability (DAV) (2) 2001-11-29
date of Announcement (DOA) (3) 2000-02-01
date of Publication (DOP) (4) 2002-06-01
date of Withdrawal (DOW) (5) 2002-08-01


Supersedes HD 384.4.43 S1:1980
Superseded by HD 60364-4-43:2010
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.