IEC 60974-9:2018
(Main)Arc welding equipment - Part 9: Installation and use
Arc welding equipment - Part 9: Installation and use
IEC 60974-9:2018 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 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:
- addition of a new Clause 8;
- addition of interpolation details in Table 1.
Matériel de soudage à l'arc - Partie 9: Installation et utilisation
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.
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IEC 60974-9 ®
Edition 2.0 2018-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Arc welding equipment –
Part 9: Installation and use
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
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IEC 60974-9 ®
Edition 2.0 2018-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Arc welding equipment –
Part 9: Installation and use
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 25.160.30 ISBN 978-2-8322-5667-1
– 2 – IEC 60974-9:2018 RLV © 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 . 9
4.2.1 Selection of supply cables . 9
4.2.2 Supply disconnecting device . 9
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 . 12
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
7.10 Welding in an environment with increased hazard 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
– 4 – IEC 60974-9:2018 RLV © 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 t
...
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
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
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les coordonnées ci-après ou contactez le Comité national de l'IEC de votre pays de résidence.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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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
– 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
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 .
...
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