SIST EN IEC 60974-9:2018

Arc welding equipment - Part 9: Installation and use (IEC 60974-9:2018)

This document is applicable to requirements for installation and instructions for use of
equipment for arc welding and allied processes designed in accordance with safety
requirements of IEC 60974-1, IEC 60974-6 or equivalent.
This document is applicable for the guidance of instructors, operators, welders, managers, and
supervisors in the safe installation and use of equipment for arc welding and allied processes
and the safe performance of welding and cutting operations.
National and local regulations take precedence over this document.

Lichtbogenschweißeinrichtungen - Teil 9: Errichten und Betreiben (IEC 60974-9:2018)

Matériel de soudage à l'arc - Partie 9: Installation et utilisation (IEC 60974-9:2018)

NEW!IEC 60974-9:2018 est disponible sous forme de IEC 60974-9:2018 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L'IEC 60974-9:2018 est applicable aux exigences relatives à l’installation et aux instructions d’utilisation du matériel pour le soudage à l’arc et les procédés connexes conçus dans le respect des exigences de sécurité de l’IEC 60974-1, de l’IEC 60974-6 ou équivalent. La présente norme annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout d’un nouvel Article 8;
- ajout de détails relatifs à l’interpolation au Tableau 1.

Oprema za obločno varjenje - 9. del: Inštalacija in uporaba (IEC 60974-9:2018)

Ta dokument se uporablja za zahteve glede inštalacije in navodil za uporabo opreme za obločno varjenje in sorodne postopke, zasnovane v skladu z varnostnimi zahtevami standarda IEC 60974-1, standarda IEC 60974-6 ali enakovrednega standarda.
Ta dokument se uporablja za podajanje navodil za inštruktorje, operaterje, varilce, vodje in nadzornike glede varne namestitve in uporabe opreme za obločno varjenje in sorodne postopke ter glede varnega izvajanja postopkov varjenja in rezanja.
Nacionalni in lokalni predpisi imajo prednost pred tem dokumentom.

General Information

• Status: Published
• Publication Date: 25-Jul-2018
• ICS: 25.160.30 - Welding equipment
• Technical Committee: I09 - Imaginarni 09
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 02-Jul-2018
• Due Date: 06-Sep-2018
• Completion Date: 26-Jul-2018
• Ref Project: EN IEC 60974-9:2018 - Arc welding equipment - Part 9: Installation and use

Relations

• Replaces: SIST EN 60974-9:2010 - Arc welding equipment - Part 9: Installation and use (IEC 60974-9:2010)
• Effective Date: 26-Jun-2018

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN IEC 60974-9:2018
01-september-2018
1DGRPHãþD
SIST EN 60974-9:2010
2SUHPD]DREORþQRYDUMHQMHGHO,QãWDODFLMDLQXSRUDED,(&
Arc welding equipment - Part 9: Installation and use (IEC 60974-9:2018)
Lichtbogenschweißeinrichtungen - Teil 9: Errichten und Betreiben (IEC 60974-9:2018)
Matériel de soudage à l'arc - Partie 9: Installation et utilisation (IEC 60974-9:2018)
Ta slovenski standard je istoveten z: EN IEC 60974-9:2018
ICS:
25.160.30 Varilna oprema Welding equipment
SIST EN IEC 60974-9:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60974-9:2018

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SIST EN IEC 60974-9:2018


EUROPEAN STANDARD EN IEC 60974-9

NORME EUROPÉENNE

EUROPÄISCHE NORM
June 2018
ICS 25.160.30 Supersedes EN 60974-9:2010
English Version
Arc welding equipment - Part 9: Installation and use
(IEC 60974-9:2018)
Matériel de soudage à l'arc - Partie 9: Installation et Lichtbogenschweißeinrichtungen - Teil 9: Errichten und
utilisation Betreiben
(IEC 60974-9:2018) (IEC 60974-9:2018)
This European Standard was approved by CENELEC on 2018-06-01. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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
© 2018 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60974-9:2018 E

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SIST EN IEC 60974-9:2018
EN IEC 60974-9:2018
European foreword
The text of document 26/648/FDIS, future edition 2 of IEC 60974-9, prepared by IEC/TC 26 "Electric
welding" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60974-9:2018.
The following dates are fixed:
(dop) 2019-03-01
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2021-06-01
• latest date by which the national
standards conflicting with the
document have to be withdrawn

This document supersedes EN 60974-9:2010.

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.

Endorsement notice
The text of the International Standard IEC 60974-9:2018 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 60364-4-41 NOTE Harmonized as HD 60364-4-41.
IEC 60974-2 NOTE Harmonized as EN 60974-2.
IEC 60974-3 NOTE Harmonized as EN 60974-3.
IEC 60974-5:2013 NOTE Harmonized as EN 60974-5:2013 (not modified).
IEC 60974-6:2015 NOTE Harmonized as EN 60974-6:2016 (not modified).
IEC 60974-7 NOTE Harmonized as EN 60974-7.
IEC 60974-8 NOTE Harmonized as EN 60974-8.
IEC 60974-10 NOTE Harmonized as EN 60974-10.
IEC 61008 Series NOTE Harmonized as EN 61008 Series.
IEC 61009 Series NOTE Harmonized as EN 61009 Series.
IEC 61140 NOTE Harmonized as EN 61140.
1
IEC 62822-1:2016 NOTE Harmonized as EN 62822-1:201X (modified).
ISO 11611 NOTE Harmonized as EN ISO 11611.

1
To be published.
2

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SIST EN IEC 60974-9:2018
EN IEC 60974-9:2018
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 60245-6 -  Rubber insulated cables - Rated voltages - -
up to and including 450/750 V -
Part 6: Arc welding electrode cables
IEC 60755 -  General safety requirements for residual - -
current operated protective devices
IEC 60974-1 -  Arc welding equipment - EN 60974-1 -
Part 1: Welding power sources
IEC 60974-4 -  Arc welding equipment - EN 60974-4 -
Part 4: Periodic inspection and testing
IEC 60974-11 -  Arc welding equipment - EN 60974-11 -
Part 11: Electrode holders
IEC 60974-12 -  Arc welding equipment - EN 60974-12 -
Part 12: Coupling devices for welding
cables
IEC 60974-13 -  Arc welding equipment - EN 60974-13 -
Part 13: Welding clamp

3

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SIST EN IEC 60974-9:2018

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SIST EN IEC 60974-9:2018



IEC 60974-9

®


Edition 2.0 2018-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Arc welding equipment –

Part 9: Installation and use




Matériel de soudage à l’arc –

Partie 9: Installation et utilisation
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 25.160.30 ISBN 978-2-8322-5635-0



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 60974-9:2018
– 2 – IEC 60974-9:2018 © IEC 2018
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions. 6
4 Installation . 8
4.1 General . 8
4.2 Supply circuit . 8
4.2.1 Selection of supply cables . 8
4.2.2 Supply disconnecting device . 8
4.2.3 Emergency stopping device . 9
4.3 Welding circuit . 9
4.3.1 Isolation from the input supply . 9
4.3.2 Summation of no-load voltages . 9
4.3.3 Welding cables . 9
4.3.4 Connection between the welding power source and the workpiece . 10
4.3.5 Earthing of the workpiece . 11
4.3.6 Location of gas cylinders . 11
5 Electromagnetic compatibility (EMC) . 12
5.1 General . 12
5.2 Assessment of area . 12
5.3 Methods of reducing emissions . 12
5.3.1 Public supply system . 12
5.3.2 Maintenance of arc-welding equipment . 12
5.3.3 Welding cables . 13
5.3.4 Equipotential bonding . 13
5.3.5 Earthing of the workpiece . 13
5.3.6 Screening and shielding . 13
6 Electromagnetic fields (EMF) . 13
6.1 General . 13
6.2 Assessment of exposure . 14
7 Use. 14
7.1 General requirements . 14
7.2 Connection between several welding power sources . 14
7.3 Inspection and maintenance of the welding installation . 14
7.3.1 Periodical inspection . 14
7.3.2 Routine inspection . 15
7.4 Disconnection of welding power sources and/or welding circuits . 15
7.5 Guards . 15
7.6 Information for operators . 15
7.7 Protective measures . 15
7.7.1 Extraneous conductive parts in the welding area . 15
7.7.2 Protection against electric shock . 15
7.8 Isolation of the welding circuit from the workpiece and earth when not in use . 16
7.9 Voltage between electrode holders or torches . 16

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SIST EN IEC 60974-9:2018
IEC 60974-9:2018 © IEC 2018 – 3 –
7.10 Welding in an environment with increased risk of electric shock . 18
7.11 Use of shoulder slings . 18
7.12 Welding at elevated positions . 19
7.13 Welding with suspended welding equipment . 19
8 Battery-powered welding power sources . 19
8.1 Safety recommendations . 19
8.2 Transportation . 19
Annex A (informative) Hazards associated with arc welding . 20
A.1 General . 20
A.2 Equipment condition and maintenance . 20
A.3 Operation . 20
A.4 Training . 20
A.5 Arc radiation. 20
A.5.1 General . 20
A.5.2 Eye and face protection (see also A.9) . 21
A.5.3 Body protection (see also A.9) . 21
A.5.4 Protection of persons in the vicinity of an arc . 21
A.6 EMF . 21
A.6.1 General . 21
A.6.2 Body protection . 21
A.6.3 Protection of persons in the vicinity of the welding operation . 21
A.7 Welding fume . 21
A.8 Noise . 22
A.9 Fire and explosion . 24
A.9.1 General . 24
A.9.2 Fire . 24
A.9.3 Explosion . 24
A.10 General protective clothing . 24
A.11 Confined spaces . 24
Annex B (informative) Voltage drops in the welding circuit . 26
Bibliography . 28

Figure 1 – Example of DC voltage between electrode holders or torches . 17
Figure 2 – Example of AC voltage between electrode holders or torches – Single-phase
supply from the same pair of lines of a three-phase mains supply . 17
Figure 3 – Example of AC voltage between electrode holders or torches – Single-phase
supply from different pairs of lines of a three-phase mains supply . 17
Figure 4 – Example of AC voltage between electrode holders connected between
different lines of output . 18
Figure A.1 – Steps for the control of welding fumes . 23
Figure A.2 – Example steps of operation for work in confined spaces . 25
Figure B.1 – Example of MIG/MAG equipment . 26

Table 1 – Current ratings for copper welding cables . 10
Table B.1 – Voltage drop in copper and aluminium welding cables at normal and
elevated temperatures . 27

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SIST EN IEC 60974-9:2018
– 4 – IEC 60974-9:2018 © IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

ARC WELDING EQUIPMENT –

Part 9: Installation and use

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 60974-9 has been prepared by IEC technical committee 26: Electric
welding.
This standard cancels and replaces the first edition published in 2010. This edition constitutes
a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of a new Clause 8;
b) addition of interpolation details in Table 1.

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SIST EN IEC 60974-9:2018
IEC 60974-9:2018 © IEC 2018 – 5 –
The text of this International Standard is based on the following documents:
FDIS Report on voting
26/648/FDIS 26/649/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:
– terms defined in Clause 3: in bold type.
A list of all the parts of the IEC 60974 series can be found, under the general title Arc welding
equipment, on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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SIST EN IEC 60974-9:2018
– 6 – IEC 60974-9:2018 © IEC 2018
ARC WELDING EQUIPMENT –

Part 9: Installation and use



1 Scope
This document is applicable to requirements for installation and instructions for use of
equipment for arc welding and allied processes designed in accordance with safety
requirements of IEC 60974-1, IEC 60974-6 or equivalent.
This document is applicable for the guidance of instructors, operators, welders, managers, and
supervisors in the safe installation and use of equipment for arc welding and allied processes
and the safe performance of welding and cutting operations.
National and local regulations take precedence over this document.
2 Normative references
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.
IEC 60245-6, Rubber insulated cables – Rated voltages up to and including 450/750 V – Part 6:
Arc welding electrode cables
IEC 60755, General requirements for residual current operated protective devices
IEC 60974-1, Arc welding equipment – Part 1: Welding power sources
IEC 60974-4, Arc welding equipment – Part 4: Periodic inspection and testing
IEC 60974-11, Arc welding equipment – Part 11: Electrode holders
IEC 60974-12, Arc welding equipment – Part 12: Coupling devices for welding cables
IEC 60974-13, Arc welding equipment – Part 13: Welding clamp
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
welding circuit
conductive material through which the welding current is intended to flow

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SIST EN IEC 60974-9:2018
IEC 60974-9:2018 © IEC 2018 – 7 –
Note 1 to entry: In arc welding, the arc is a part of the welding circuit.
Note 2 to entry: In certain arc welding processes, the arc can be established between two electrodes. In such a
case, the workpiece is not necessarily a part of the welding circuit.
[SOURCE: IEC 60050-851:2008, 851-14-10]
3.2
extraneous conductive part
conductive part not forming part of the electrical installation and liable to introduce an electric
potential, generally the earth potential
Note 1 to entry: Electrical installation includes the welding circuit.
[SOURCE: IEC 60050-851:2008, 851-14-57]
3.3
workpiece
metal piece or pieces on which welding or allied processes are performed
[SOURCE: IEC 60050-851:2008, 851-11-19]
3.4
protective clothing
protective accessories
protective clothing and accessories (e.g. gloves, hand shields, head masks and filter lenses)
used in order to diminish electric shock risks and the effects of fume and spatter and to protect
the skin and eyes against arc radiation
[SOURCE: IEC 60050-851:2008, 851-11-18]
3.5
environment with increased risk of electric shock
environment where the hazard of electric shock by arc welding is increased in relation to
normal arc welding conditions
Note 1 to entry: Such environments are found for example
a) locations in which freedom of movement is restricted, so that the operator is forced to perform the welding in a
cramped (for example kneeling, sitting, lying) position with physical contact with conductive parts;
b) in locations which are fully or partially limited by conductive elements and in which there is a high risk of
unavoidable or accidental contact by the operator;
c) in wet, damp or hot locations where humidity or perspiration considerably reduces the skin resistance of the
human body and the insulating properties of protective accessories.
Note 2 to entry: Environments with increased risk of electric shock are not meant to include places where
electrically conductive parts in the near vicinity of the operator which can cause increased hazard have been
insulated.
[SOURCE: IEC 60050-851:2008, 851-15-09]
3.6
expert
competent person
skilled person
person who can judge the work assigned and recognize possible hazards on the basis of
professional training, knowledge, experience and knowledge of the relevant equipment

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Note 1 to entry: Several years of practice in the relevant technical field can be taken into consideration in
assessment of professional training.
[SOURCE: IEC 60050-851:2008, 851-11-10]
3.7
wire feeder
equipment that delivers filler wire to the arc or weld zone which includes means to apply motion
to the filler wire
Note 1 to entry: The wire feeder may also include the wire-feed control, the filler wire supply, devices for gas
control, indicators and remote connectors.
[SOURCE: IEC 60050-851:2008, 851-14-39]
4 Installation
4.1 General
Welding equipment used in arc welding installations shall be intended for the purpose as given
on the rating plate.
Electromagnetic compatibility (EMC) requirements shall be taken into consideration during
installation, see Clause 5.
The requirements of national and local regulations shall be taken into consideration during
installation, including grounding or protective earth connections, fuses, supply disconnecting
device, type of supply circuit, etc.
Read the manufacturer's instruction manual before installing the equipment. Full use shall be
made of the technical information relevant to the welding equipment.
Specific advice may be obtained from the welding equipment manufacturer, if necessary.
4.2 Supply circuit
4.2.1 Selection of supply cables
Supply cables for welding equipment and their overload protection, if not provided by the
manufacturer, shall be selected in accordance with the information given in the manufacturer's
instruction manual.
NOTE Examples of local regulations are given in the Bibliography, e.g. EN 50525-2-21, Electrical code NFPA 70
(SE, SO, ST, STO or other extra hard usage cable) or CSA C22.1. PVC insulation has been proven not suitable for
the application.
Supply cables shall be placed so that they cannot be damaged in use. If that cannot be
achieved, a residual current device (RCD), capable of operating at a leakage current not
exceeding 30 mA in accordance with IEC 60755, shall be used to reduce the risk of electric
shock.
4.2.2 Supply disconnecting device
The installer shall ensure that a supply disconnecting device is fitted at the point of supply.
NOTE A plug can be used as supply disconnecting device in accordance with national or local regulation.

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IEC 60974-9:2018 © IEC 2018 – 9 –
4.2.3 Emergency stopping device
When an emergency stopping device is required by a national regulation (e.g. automatic
welding
...