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



Reference EN 60974-1:2012
Title Arc welding equipment - Part 1: Welding power sources
Project Number 23183
Abstract/Scope IEC 60974-1:2012 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1 000 V, or driven by mechanical means. This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems. This fourth edition cancels and replaces the third edition published in 2005 and constitutes a technical revision. The significant changes with respect to the previous edition are the following: - the heating test shall be carried out at ambient temperature of 40 °C (see 5.1); - new Figure 1 summarizes example of insulation requirements; - creepage distances for pollution degree 4 are no longer valid (see Table 2); - insulation requirements for Class II equipment are defined (see Table 3); - dielectric test voltage interpolation restriction lower limit is changed to 220 V and interpolation for control and welding circuit is clarified (see Table 4); - water test is clarified by suppression of visual inspection (see 6.2.1); - isolation requirements of the supply circuit and the welding circuit are moved in protection against electric shock in normal service (see 6.2.4); - touch current in normal service and in single fault condition requirements are changed (see 6.2.5, 6.2.6 and 6.3.6); - maximum temperature for insulation systems are reviewed in accordance with current edition of IEC 60085 (see Table 6); - limits of temperature rise for external surfaces are updated depending of unintentional contact period as defined in ISO 13732-1 (see Table 7); - loading test is completed by a dielectric test (see 7.4); - conformity test for tolerance to supply voltage fluctuation is clarified (see 10.1); - marking of terminals is limited to external protective conductor and three-phase equipment terminals (see 10.4); - usage of hazard reducing device is clarified (see 11.1); - requirements for control circuits are changed (see Clause 12); - impact test is clarified (see 14.2.2); - environmental parameters are completed (see Annex M).


Current Stage code 6060
Current Stage code date 2012-08-10
Current Stage code deadline 2013-04-17
Deadline date for vote  


Directive(s) LVD (2006/95/EC)
Order Voucher  


IEC Technical Body IEC/TC 26
Reference Document IEC 60974-1:2012 (EQV)
ICS 25.160 - Welding, brazing and soldering
Keywords Arc: Welding; Power source
Note Supersedes EN 60974-1:2005 * 2012-07-05: Publication editing allocated to
Special National Condition(s)  


Categories - Aspects
Product Life Cycle


Deadline Date
6060 2012-08-10 2013-04-17 export to doc file  EN  FR  DE
5099 2012-07-17 2012-08-14  
5060 2012-04-10 2012-05-01 export to doc file  EN
5020 2012-02-03 2012-04-06  
3090 2011-11-28 2011-11-30  
5060 2011-04-04 2011-04-25 export to doc file  EN
5020 2010-10-29 2011-04-01  
1090 2010-10-26 2010-10-29  

Implementation Dates

date of Ratification (DOR) (1) 2012-07-17
date of Availability (DAV) (2) 2012-08-10
date of Announcement (DOA) (3) 2012-10-17
date of Publication (DOP) (4) 2013-04-17
date of Withdrawal (DOW) (5) 2015-07-17


Supersedes EN 60974-1:2005
Superseded by  
Normative reference (6) IEC 60050-151:2001
IEC 60050-851:2008
IEC 60245-6
EN 60445
IEC 60529
EN 60664-1:2007
EN 60664-3
EN 60695-11-10
EN 60974-7
EN 61140
EN 61558-2-4
EN 61558-2-6
IEC 60417-DB

(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.