IEC 60079-17:2023
(Main)Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
Explosive atmospheres - Part 17: Electrical installations inspection and maintenance
IEC 60079-17:2023 is available as IEC 60079-17:2023 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 60079-17:2023 applies to users and covers only those factors directly related to the inspection and maintenance of electrical installations specifically designed for hazardous areas, where the hazard is caused by explosive atmospheres.
It does not include:
- other fundamental installation and inspection requirements for electrical installations;
- the verification of electrical equipment;
- protection or ventilation of rooms;
- gas detection systems;
- the repair, overhaul and reclamation of explosion protected equipment (see IEC 60079-19).
While this document does not include inspection of safety devices such as used in ventilated rooms (see IEC 60079-13), it does include the requirements for inspection and maintenance of individual items of equipment that will be part of such systems, for example motors or sensors. This document supplements the requirements for inspection and testing in non-hazardous areas in IEC 60364-6. This document is intended to be applied where there is a risk due to the potential presence of explosive gas or dust mixtures with air or combustible dust layers under normal atmospheric conditions. It does not apply to:
- underground mining areas,
- dusts of explosives,
- pyrophoric substances.
This sixth edition cancels and replaces the fifth edition published in 2013. This edition constitutes a technical revision.
Atmosphères explosives - Partie 17 : Inspection et maintenance des installations électriques
IEC 60079-17:2023 est disponible sous forme de IEC 60079-17:2023 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.L'IEC 60079-17:2023 s’applique aux utilisateurs et couvre uniquement les facteurs directement liés à l’inspection et à la maintenance des installations électriques spécialement conçues pour les emplacements dangereux, où le danger provient des atmosphères explosives. Elle ne comprend pas:
- les autres exigences fondamentales relatives à l’installation et à l’inspection pour les installations électriques;
- la vérification des appareils électriques;
- la protection ou la ventilation des salles;
- les systèmes de détection de gaz;
- les réparations, les révisions et la remise en état des appareils protégés contre l’explosion (voir IEC 60079-19).
Bien que le présent document n’inclue pas l’inspection des dispositifs de sécurité tels que ceux utilisés dans les salles ventilées (voir IEC 60079-13), il inclut les exigences relatives à l’inspection et à la maintenance de chacun des éléments des appareils qui font partie de ces systèmes, par exemple les moteurs ou les capteurs. Le présent document constitue un complément pour les exigences relatives aux inspections et aux essais de l’IEC 60364-6 effectués dans des emplacements non dangereux. Le présent document est destiné à être appliqué s’il existe un risque dû à la présence potentielle de gaz explosifs, de mélanges de poussières dans l’air ou de couches de poussières combustibles dans des conditions atmosphériques normales. Il ne s’applique pas:
- aux parties souterraines des mines;
- aux poussières d’explosifs;
- aux substances pyrophoriques.
Cette sixième édition annule et remplace la cinquième édition parue en 2013. Cette édition constitue une révision technique.
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IEC 60079-17 ®
Edition 6.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 17: Electrical installations inspection and maintenance
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 60079-17 ®
Edition 6.0 2023-12
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 17: Electrical installations inspection and maintenance
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-7957-1
– 2 – IEC 60079-17:2023 RLV © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General requirements . 13
4.1 Documentation . 13
4.2 Qualification Competence of personnel . 13
4.3 Integrated systems. 14
4.4 Inspections . 14
4.4.1 General . 14
4.4.2 Grades of inspection . 16
4.4.3 Types of inspection . 16
4.5 Periodic inspections . 17
4.5.1 Personnel . 17
4.5.2 Fixed installations . 17
4.5.3 Movable Transportable, personal and portable equipment . 18
4.6 Continuous supervision by skilled personnel . 18
4.6.1 Concept . 18
4.6.2 Objectives . 19
4.6.3 Responsibilities . 19
4.6.4 Frequency of inspection . 20
4.6.5 Documents . 20
4.6.6 Training . 20
4.7 Maintenance requirements . 20
4.7.1 Remedial measures and alterations modifications to equipment . 20
4.7.2 Maintenance of flexible cables . 21
4.7.3 Withdrawal from service . 21
4.7.4 Fastenings and tools . 21
4.8 Environmental conditions External influences . 22
4.9 Isolation of equipment . 23
4.9.1 Installations other than intrinsically safe circuits . 23
4.9.2 Live maintenance on Intrinsically safe installations . 24
4.10 Earthing and equipotential bonding . 24
4.11 Specific Conditions of Use . 25
4.12 Movable equipment and its connections . 25
4.13 Inspection schedules . 25
4.13.1 General . 25
4.13.2 Equipment is appropriate to the EPL/Zone requirements of the location . 26
4.13.3 Equipment group . 26
4.13.4 Equipment maximum surface temperature . 26
4.13.5 Equipment circuit identification . 26
4.13.6 Ex Cable Glands . 26
4.13.7 Type of cable . 26
4.13.8 Sealing . 26
4.13.9 Test and measuring equipment . 26
4.13.10 Fault loop impedance or earthing resistance . 27
4.13.11 Insulation resistance . 27
4.13.12 Overload protection . 27
4.13.13 Lamps and luminaires . 27
5 Additional inspection schedule requirements . 28
5.1 Type of Protection "d" – Flameproof enclosure (see Table 1
and IEC 60079-1) . 28
5.2 Type of Protection "e" – Increased safety (see Table 1 and IEC 60079-7) . 28
5.2.1 Level of Protection "eb" . 28
5.2.2 Level of Protection "ec" . 29
5.3 Type of Protection "i" – Intrinsic safety (see Table 2 and IEC 60079-11) . 29
5.3.1 General . 29
5.3.2 Documentation . 29
5.3.3 Labelling . 29
5.3.4 Unauthorized modifications . 29
5.3.5 Associated apparatus (safety interface) between intrinsically safe and
non-intrinsically safe circuits . 30
5.3.6 Cables . 30
5.3.7 Cable screens . 30
5.3.8 Point-to-point connections . 30
5.3.9 Earth continuity of non-galvanically isolated circuits . 30
5.3.10 Earth connections to maintain the integrity of the intrinsic safety . 30
5.3.11 Intrinsically safe circuit earthing or insulation . 31
5.3.12 Separation between intrinsically safe and non-intrinsically safe circuits . 31
5.4 Type of Protection "p" and "pD" – Pressurized enclosure (see Table 3,
IEC 60079-2 and IEC 61241-4) . 31
5.5 Type of Protection "n" (see Table 1 or 2 and IEC 60079-15) . 31
5.5.1 General . 31
5.5.2 Restricted breathing enclosures . 31
5.6 Type of Protection "t" and "tD" – Protection by enclosure (see Table 1 and
IEC 60079-31 and IEC 61241-1) . 32
5.7 Types of Protection "o" (liquid immersion) . 32
5.8 Types of Protection "m" and "mD" (encapsulation), “o”, (oil-immersion) "op"
(optical radiation) and "q" (powder-filling) . 32
6 Inspection tables . 32
Annex A (informative) Typical inspection procedure for periodic inspections . 39
Annex B (normative) Knowledge, skills and competencies of responsible persons,
Technical Persons with Executive Function and operatives Skilled Personnel . 40
B.1 Scope General . 40
B.2 Knowledge and skills . 40
B.2.1 Responsible persons and Technical Persons with Executive Function . 40
B.2.2 Operative/technician Skilled Personnel (inspection and maintenance) . 40
B.3 Competencies . 41
B.3.1 General . 41
B.3.2 Responsible persons and Technical Persons with Executive Function . 41
B.3.3 Operative/technician Skilled Personnel . 41
B.4 Assessment . 41
Annex C (informative) Fitness-for-purpose assessment . 42
C.1 Background. 42
C.2 Need for a fitness-for-purpose assessment . 42
C.3 Approach . 42
– 4 – IEC 60079-17:2023 RLV © IEC 2023
C.4 Ignition sources . 42
C.5 Contents of the fitness-for-purpose assessment . 42
C.5.1 General . 42
C.5.2 Scope of the assessment report . 42
C.5.3 Equipment and its application .
...
IEC 60079-17 ®
Edition 6.0 2023-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 17: Electrical installations inspection and maintenance
Atmosphères explosives –
Partie 17 : Inspection et maintenance des installations électriques
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
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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 corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC Products & Services Portal - products.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 300 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 19 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
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IEC 60079-17 ®
Edition 6.0 2023-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 17: Electrical installations inspection and maintenance
Atmosphères explosives –
Partie 17 : Inspection et maintenance des installations électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.260.20 ISBN 978-2-8322-7759-1
– 2 – IEC 60079-17:2023 © IEC 2023
CONTENTS
FOREWORD . 5
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 10
3 Terms and definitions . 11
4 General requirements . 12
4.1 Documentation . 12
4.2 Competence of personnel . 13
4.3 Integrated systems. 13
4.4 Inspections . 13
4.4.1 General . 13
4.4.2 Grades of inspection . 15
4.4.3 Types of inspection . 15
4.5 Periodic inspections . 16
4.5.1 Personnel . 16
4.5.2 Fixed installations . 16
4.5.3 Transportable, personal and portable equipment . 17
4.6 Continuous supervision by Skilled Personnel . 17
4.6.1 Concept . 17
4.6.2 Objectives . 17
4.6.3 Responsibilities . 18
4.6.4 Frequency of inspection . 18
4.6.5 Documents . 19
4.6.6 Training . 19
4.7 Maintenance requirements . 19
4.7.1 Remedial measures and modifications to equipment . 19
4.7.2 Maintenance of flexible cables . 20
4.7.3 Withdrawal from service . 20
4.7.4 Fastenings and tools . 20
4.8 External influences . 20
4.9 Isolation of equipment . 21
4.9.1 Installations other than intrinsically safe circuits . 21
4.9.2 Live maintenance on Intrinsically safe installations . 22
4.10 Earthing and equipotential bonding . 23
4.11 Specific Conditions of Use . 23
4.12 Movable equipment and its connections . 23
4.13 Inspection schedules . 23
4.13.1 General . 23
4.13.2 Equipment is appropriate to the EPL/Zone requirements of the location . 23
4.13.3 Equipment group . 24
4.13.4 Equipment maximum surface temperature . 24
4.13.5 Equipment circuit identification . 24
4.13.6 Ex Cable Glands . 24
4.13.7 Type of cable . 24
4.13.8 Sealing . 24
4.13.9 Test and measuring equipment . 24
4.13.10 Fault loop impedance or earthing resistance . 24
4.13.11 Insulation resistance . 25
4.13.12 Overload protection . 25
4.13.13 Lamps and luminaires . 25
5 Additional inspection schedule requirements . 25
5.1 Type of Protection "d" – Flameproof enclosure . 25
5.2 Type of Protection "e" – Increased safety . 26
5.2.1 Level of Protection "eb" . 26
5.2.2 Level of Protection "ec" . 26
5.3 Type of Protection "i" – Intrinsic safety . 26
5.3.1 General . 26
5.3.2 Documentation . 27
5.3.3 Labelling . 27
5.3.4 Unauthorized modifications . 27
5.3.5 Associated apparatus (safety interface) between intrinsically safe and
non-intrinsically safe circuits . 27
5.3.6 Cables . 27
5.3.7 Cable screens . 27
5.3.8 Point-to-point connections . 27
5.3.9 Earth continuity of non-galvanically isolated circuits . 28
5.3.10 Earth connections to maintain the integrity of the intrinsic safety . 28
5.3.11 Intrinsically safe circuit earthing or insulation . 28
5.3.12 Separation between intrinsically safe and non-intrinsically safe circuits . 28
5.4 Type of Protection "p" and "pD" – Pressurized enclosure . 28
5.5 Type of Protection "n" . 29
5.5.1 General . 29
5.5.2 Restricted breathing enclosures . 29
5.6 Type of Protection "t" and "tD" – Protection by enclosure . 29
5.7 Types of Protection "o" (liquid immersion) . 29
5.8 Types of Protection "m" and "mD" (encapsulation), "op" (optical radiation)
and "q" (powder-filling) . 29
6 Inspection tables .
...
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