SIST EN IEC 60974-8:2022

SLOVENSKI STANDARD
01-februar-2022
Nadomešča:
SIST EN 60974-8:2009
Oprema za obločno varjenje - 8. del: Plinske konzole za varilne in plazemske
rezalne sisteme (IEC 60974-8:2021)
Arc welding equipment - Part 8: Gas consoles for welding and plasma cutting systems
(IEC 60974-8:2021)
Lichtbogenschweißeinrichtungen - Teil 8: Gaskonsolen für Schweiß- und
Plasmaschneidsysteme (IEC 60974-8:2021)
Matériel de soudage à l'arc - Partie 8: Consoles de gaz pour soudage et systèmes de
coupage plasma (IEC 60974-8:2021)
Ta slovenski standard je istoveten z: EN IEC 60974-8:2021
ICS:
25.160.30 Varilna oprema Welding equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60974-8

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2021
ICS 25.160 Supersedes EN 60974-8:2009 and all of its amendments
and corrigenda (if any)
English Version
Arc welding equipment - Part 8: Gas consoles for welding and
plasma cutting systems
(IEC 60974-8:2021)
Matériel de soudage à l'arc - Partie 8: Consoles de gaz Lichtbogenschweißeinrichtungen - Teil 8: Gaskonsolen für
pour soudage et systèmes de coupage par plasma Schweiß- und Plasmaschneidsysteme
(IEC 60974-8:2021) (IEC 60974-8:2021)
This European Standard was approved by CENELEC on 2021-09-15. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60974-8:2021 E

European foreword
The text of document 26/719/FDIS, future edition 3 of IEC 60974-8, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-06-15
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-09-15
document have to be withdrawn
This document supersedes EN 60974-8:2009 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential
requirements of EU Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an
integral part of this document.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60974-8:2021 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60204-1 NOTE Harmonized as EN 60204-1
IEC 60974-2 NOTE Harmonized as EN IEC 60974-2
IEC 60974-3 NOTE Harmonized as EN IEC 60974-3
IEC 60974-7 NOTE Harmonized as EN IEC 60974-7
IEC 61010-1:2010 NOTE Harmonized as EN 61010-1:2010 (not modified)
ISO 3821 NOTE Harmonized as EN ISO 3821
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60050-151 2001 International Electrotechnical Vocabulary - -
– Part 151: Electrical and magnetic
devices (available at:
http://www.electropedia.org)
IEC 60529 - Degrees of protection provided by EN 60529 1991
enclosures (IP Code)
+ corrigendum May 1993
+ A1 2000
+ A2 2013
+ AC 2016
+ A2:2013/AC 2019
IEC60974-1 2017 Arc welding equipment – Part 1: Welding EN60974-1 2018
power source
IEC60974-1 2019 Arc welding equipment – Part 1: Welding EN IEC60974-1 2019
AMD1 power source A1
Annex ZZ
(informative)
Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be
covered
This European standard has been prepared under a Commission’s standardisation request relating to
harmonised standards in the field of the Low Voltage Directive, M/511, to provide one voluntary means
of conforming to safety objectives of Directive 2014/35/EU of the European Parliament and of the
Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the
making available on the market of electrical equipment designed for use within certain voltage limits
[2014 OJ L96].
Once this standard is cited in the Official Journal of the European Union under that Directive,
compliance with the normative clauses of this standard given in Table ZZ.1 confers, within the limits of
the scope of this standard, a presumption of conformity with the corresponding safety objectives of
that Directive, and associated EFTA regulations.
Table ZZ.1 — Correspondence between this European standard and Annex I of Directive
2014/35/EU [2014 OJ L96]
Clause(s) / sub-clause(s)
Safety objectives of Directive
Remarks / Notes
2014/35/EU
of this EN
(1)(a) Clauses 12, 13.1, 13.2
(1)(b) Clause 9, 13.1
(1)(c) Clauses 1, 3, 4
(2)(a) Clauses 6.1, 6.2, 6.2.3, 6.2.5,
6.2.6, 6.3, 11
(2)(b) Clauses 6.1, 6.2, 6.3, 7, 9.3.3, 11 Hazards arising from electric,
magnetic, and electromagnetic
fields, other ionizing and non-
ionizing radiation are covered
in separate standards
(2)(c) Clauses 9, 9.1, 9.2, 9.3, 10
(2)(d) Clause 6.1
(3)(a) Clauses 4, 6.2.1, 9, 9.1, 9.2, 9.3,
9.3.3.2, 10, 10.1, 10.2, 10.3, 13.1
b)
(3)(b) Clauses 4, 6.2.1, 9, 10
(3)(c) Clause 9
WARNING 1 — Presumption of conformity stays valid only as long as a reference to this European
standard is maintained in the list published in the Official Journal of the European Union. Users of this
standard should consult frequently the latest list published in the Official Journal of the European
Union.
WARNING 2 — Other Union legislation may be applicable to the product(s) falling within the scope of
this standard.
IEC 60974-8 ®
Edition 3.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 8: Gas consoles for welding and plasma cutting systems

Matériel de soudage à l’arc –
Partie 8: Consoles de gaz pour soudage et systèmes de coupage par plasma

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.160.30 ISBN 978-2-8322-9705-6

– 2 – IEC 60974-8:2021 © IEC 2021
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 Environmental conditions . 9
5 Tests . 9
5.1 Test conditions . 9
5.2 Measuring instruments . 9
5.3 Conformity of components . 9
5.4 Type tests . 9
5.5 Routine tests. 9
5.5.1 EXTERNAL GAS CONSOLE . 9
5.5.2 INTERNAL GAS CONSOLE . 9
6 Protection against electric shock . 9
6.1 Insulation . 9
6.1.1 General . 9
6.1.2 Clearances . 10
6.1.3 Creepage distances . 10
6.1.4 Insulation resistance . 10
6.1.5 Dielectric strength . 10
6.2 Protection against electric shock in normal service (direct contact) . 10
6.2.1 Protection provided by the enclosure . 10
6.2.2 Capacitors . 10
6.2.3 Automatic discharge of supply circuit capacitors . 10
6.2.4 Isolation of the welding circuit . 10
6.2.5 Welding circuit touch current . 10
6.2.6 Touch current in normal condition . 10
6.3 Protection against electric shock in case of a fault condition (indirect
contact) . 10
7 Thermal requirements . 11
7.1 Heating test . 11
7.2 Temperature measurement . 11
7.3 Limits of temperature rise . 11
8 Connections for plasma cutting torches . 11
9 Mechanical provisions . 11
9.1 General . 11
9.2 Protection against fire or explosion . 11
9.3 Gas line purging. 12
9.4 Enclosure . 12
9.4.1 Design requirements . 12
9.4.2 Enclosure purging . 12
9.4.3 Safe design of GAS CONSOLE . 13
9.4.4 Open structure . 13
9.4.5 Solid filled enclosure . 13

IEC 60974-8:2021 © IEC 2021 – 3 –
9.5 EXTERNAL GAS CONSOLE . 14
9.6 INTERNAL GAS CONSOLE . 14
10 Gas lines . 14
10.1 Gas hoses and tubing . 14
10.2 Gas fittings . 14
10.3 Leak test . 14
11 Control circuits . 15
12 Rating plate . 15
12.1 EXTERNAL GAS CONSOLE . 15
12.2 INTERNAL GAS CONSOLE . 15
13 Instructions and markings . 15
13.1 General . 15
13.2 Instructions . 15
13.3 Marking . 16
Annex A (informative) Mechanized plasma system diagram . 17
Annex B (informative) Example of a rating plate layout . 18
Bibliography . 19

Figure A.1 – Example of a mechanized plasma system . 17
Figure B.1 – Principle of a rating plate . 18

Table 1 – Colour coding . 14

– 4 – IEC 60974-8:2021 © IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 8: Gas consoles for welding and plasma cutting systems

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60974-8 has been prepared by IEC technical committee 26: Electric
welding.
This third edition cancels and replaces the second edition, published in 2009. This edition
constitutes a technical revision.
The significant technical changes with respect to the previous edition are the following:
• changes induced by the publication of IEC 60974-1:2017;
• requirements for the rating plate as in IEC 60974-1:2017, Clause 15;
• requirements for the instructions in 13.2.
This part of IEC 60974 is to be used in conjunction with IEC 60974-1.

IEC 60974-8:2021 © IEC 2021 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
26/719/FDIS 26/723/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
In this standard, the following print types are used:
– conformity statements: in italic type.
– terms defined in Clause 3: in SMALL ROMAN CAPITALS.
A list of all parts of the IEC 60974 series, published under the general title Arc welding
equipment, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on
...