IEC 60079-5:2015
(Main)Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
Explosive atmospheres - Part 5: Equipment protection by powder filling "q"
IEC 60079-5:2015 is available as IEC 60079-5:2015 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60079-5:2015 contains specific requirements for the construction, testing and marking of electrical equipment, parts of electrical equipment and Ex components in the type of protection powder filling "q", intended for use in explosive gas atmospheres. This standard supplements and modifies the general requirements of IEC 60079-0. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirement of this standard takes precedence. This standard applies to electrical equipment, parts of electrical equipment and Ex components with:
- a rated supply current less than or equal to 16 A;
- a rated supply voltage less than or equal to 1 000 V;
- a rated power consumption less than or equal to 1 000 W. This fourth edition cancels and replaces the third edition, published in 2007, and constitutes a technical revision. Refer to the Foreword of the document for a complete listing of the technical changes between edition 4.0 and previous edition of the document. Keywords: electrical equipment and Ex components in the type of protection powder filling "q"
Atmosphères explosives - Partie 5: Protection du matériel par remplissage pulvérulent "q"
IEC 60079-5:2015 est disponible sous forme de IEC 60079-5:2015 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
IEC 60079-5:2015 contient les exigences spécifiques de construction, d'essais et de marquage d'appareil électrique, des parties d'appareil électrique et des composants Ex à remplissage pulvérulent, mode de protection "q", destinés à être utilisés dans des atmosphères explosives gazeuses. La présente norme complète et modifie les exigences générales de l'IEC 60079-0. Lorsqu'une exigence de la présente norme diverge d'une exigence de l'IEC 60079-0, l'exigence de cette norme prévaut. La présente norme s'applique aux appareils électriques, aux parties d'appareil électrique et aux composants Ex avec:
- un courant assigné d'alimentation inférieur ou égal à 16 A;
- une tension assignée d'alimentation inférieure ou égale à 1 000 V;
- une puissance consommée assignée inférieure ou égale à 1 000 W. Cette quatrième édition annule et remplace la troisième édition parue en 2007. Cette édition constitue une révision technique. Reportez-vous à l'avant-propos du document pour une liste complète des modifications techniques entre l'édition 4.0 et édition précédente du document. Mots clés: d'appareil électrique et des composants Ex à remplissage pulvérulent, mode de protection "q"
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IEC 60079-5 ®
Edition 4.0 2015-02
REDLINE VERSION
INTERNATIONAL
STANDARD
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Explosive atmospheres –
Part 5: Equipment protection by powder filling “q”
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IEC 60079-5 ®
Edition 4.0 2015-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling “q”
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-2270-6
– 2 – IEC 60079-5:2015 RLV © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Constructional requirements . 8
4.1 Enclosure Containers . 8
4.1.1 Closing and sealing . 8
4.1.2 Pressure test of container . 9
4.1.3 Degree of protection of the container . 9
4.1.4 Filling procedure . 10
4.1.5 Containers that are not external enclosures . 10
4.2 Filling material . 10
4.2.1 Material specification . 10
4.2.2 Documentation . 10
4.2.3 Testing . 10
4.3 Distances . 10
4.3.1 Distances through filling material . 10
4.3.2 Distances surrounding free space . 12
4.4 Materials used for support of energized parts Connections . 13
4.4.1 Equipment . 13
4.4.2 Ex Components . 13
4.5 External field-wiring connections .
4.5 Capacitors . 13
4.6 Cells and batteries . 13
4.7 Temperature limitations under overload conditions. 13
4.8 Temperature limitations under fault malfunction conditions . 14
4.8.1 General . 14
4.8.2 Fuse . 14
4.8.3 Malfunction exclusions . 14
4.8.4 Protective devices for temperature limitation. 17
4.8.5 Power supply prospective short-circuit current . 17
5 Verifications and tests . 17
5.1 Type verifications and tests . 17
5.1.1 Pressure type test of container . 17
5.1.2 Verification of the degree of protection of the enclosure . 18
5.1.3 Dielectric strength test of the filling material . 18
5.1.4 Maximum temperatures . 18
5.2 Routine verifications and tests . 19
5.2.1 Routine pressure test of container . 19
5.2.2 Dielectric strength test of the filling material . 20
6 Marking . 21
7 Instructions . 21
Annex A (informative) Introduction of an alternative risk assessment method
encompassing ‘equipment protection levels’ for Ex equipment .
Bibliography . 27
Figure 1 – Distances through filling material . 12
Figure 1 2 – Test arrangement for the dielectric strength test of the filling material . 20
Table 1 – Distances through the filling material . 11
Table 2 – Creepage distances and distances through filling material. 16
Table A.1 – Traditional relationship of EPLs to zones (no additional risk assessment) .
Table A.2 – Description of risk of ignition protection provided .
– 4 – IEC 60079-5:2015 RLV © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 5: Equipment protection by powder filling “q”
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.
This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
International Standard IEC 60079-5 has been prepared by IEC technical committee 31:
Equipment for explosive atmospheres.
This fourth edition cancels and replaces the third edition, published in 2007, and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
NOTE The technical changes referred to include the significant technical changes in the revised IEC standard, but
they do not form an exhaustive list of all modifications from the previous edition. More guidance may be found by
referring to the redline version of the IEC standard, if available.
Type
Significant changes Clause/subclause Minor and Extension Major
editorial technical
changes changes
Specific references to IEC 60079-0 have been
4.1.3 4.8 4.8.3 X
reworded so the references to IEC 60079-0 can
be non-dated references
The “housing” surrounding the powder filled
equipment or Ex Component has been
redefined as a “container” to avoid confusion 4.1 X
with the “enclosure” requirements of
IEC 60079-0
A relaxation has been introduced to permit
reduced distances through filling material for
4.3.1 X
instances where there is no adjacent gap in the
container
A relaxation has been introduced to permit the
use of creepage dimensions per IEC 60079-7 4.8.3 X
where CTI is be
...
IEC 60079-5 ®
Edition 4.1 2022-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
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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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
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IEC 60079-5 ®
Edition 4.1 2022-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.260.20 ISBN 978-2-8322-0347-7
IEC 60079-5 ®
Edition 4.1 2022-05
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
– 2 – IEC 60079-5:2015+AMD1:2022 CSV
© IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Constructional requirements . 7
4.1 Containers . 7
4.1.1 Closing and sealing . 7
4.1.2 Pressure test of container . 8
4.1.3 Degree of protection of the container . 8
4.1.4 Filling procedure . 8
4.1.5 Containers that are not external enclosures . 8
4.2 Filling material . 9
4.2.1 Material specification . 9
4.2.2 Documentation . 9
4.2.3 Testing . 9
4.3 Distances . 9
4.3.1 Distances through filling material . 9
4.3.2 Distances surrounding free space . 11
4.4 Connections . 12
4.4.1 Equipment . 12
4.4.2 Ex Components . 12
4.5 Capacitors . 12
4.6 Cells and batteries . 12
4.7 Temperature limitations under overload conditions. 12
4.8 Temperature limitations under malfunction conditions . 12
4.8.1 General . 12
4.8.2 Fuse . 12
4.8.3 Malfunction exclusions . 13
4.8.4 Protective devices for temperature limitation. 16
4.8.5 Power supply prospective short-circuit current . 16
5 Verifications and tests . 16
5.1 Type verifications and tests . 16
5.1.1 Pressure type test of container . 16
5.1.2 Verification of the degree of protection of the enclosure . 17
5.1.3 Dielectric strength Insulation resistance test of the filling material . 17
5.1.4 Maximum temperatures . 17
5.2 Routine verifications and tests . 18
5.2.1 Routine pressure test of container . 18
5.2.2 Dielectric strength Insulation resistance test of the filling material . 18
6 Marking . 19
7 Instructions . 20
Bibliography . 21
Figure 1 – Distances through filling material . 11
© IEC 2022
Figure 2 – Test arrangement for the dielectric strength insulation resistance test of the
filling material . 19
Table 1 – Distances through the filling material . 10
Table 2 – Creepage distances and distances through filling material. 15
– 4 – IEC 60079-5:2015+AMD1:2022 CSV
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 5: Equipment protection by powder filling “q”
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.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 60079-5 edition 4.1 contains the fourth edition (2015-02) [documents 31/1156/FDIS
and 31/1171/RVD] and its amendment 1 (2022-05) [documents 31/1601/CDV and
31/1171/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
© IEC 2022
International Standard IEC 60079-5 has been prepared by IEC technical committee 31:
Equipment for explosive atmospheres.
This fourth edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
NOTE The technical changes referred to include the significant technical changes in the revised IEC standard, but
they do not form an exhaustive list of all modifications from the previous edition. More guidance may be found by
referring to the redline version of the IEC standard, if available.
Type
Minor and Major
Significant changes Clause/subclause Extension
editorial technical
changes changes
Specific references to IEC 60079-0 have been
reworded so the references to IEC 60079-0 can 4.1.3 4.8 4.8.3 X
be non-dated references
The “housing” surrounding the powder filled
equipment or Ex Component has been
redefined as a “container” to avoid confusion 4.1 X
with the “enclosure” requirements of
IEC 60079-0
A relaxation has been introduced to permit
reduced distances through filling material for
4.3.1 X
instances where there is no adjacent gap in the
container
A relaxation has been introduced to permit the
use of creepage dimensions per IEC 60079-7 4.8.3 X
where CTI is better than 175
An evaluation of joints employed when the
reduced distances according to Table 1 are 5.1.1 X
applied, has been added.
Text for determination of maximum temperature
clarified with respect to overloads and 5.1.4 X
malfunctions
A batch routine test has been i
...
IEC 60079-5 ®
Edition 4.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 5: Equipment protection by powder filling “q”
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent “q”
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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Switzerland www.iec.ch
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 more than 30 000 terms and
Technical Specifications, Technical Reports and other definitions in English and French, with equivalent terms in 15
documents. Available for PC, Mac OS, Android Tablets and additional languages. Also known as the International
iPad. Electrotechnical Vocabulary (IEV) online.
IEC publications search - www.iec.ch/searchpub IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a More than 60 000 electrotechnical terminology entries in
variety of criteria (reference number, text, technical English and French extracted from the Terms and Definitions
committee,…). It also gives information on projects, replaced clause of IEC publications issued since 2002. Some entries
and withdrawn publications. have been collected from earlier publications of IEC TC 37,
77, 86 and CISPR.
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IEC 60079-5 ®
Edition 4.0 2015-02
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 5: Equipment protection by powder filling “q”
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent “q”
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.260.20 ISBN 978-2-8322-2249-2
– 2 – IEC 60079-5:2015 © IEC 2015
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references. 6
3 Terms and definitions . 7
4 Constructional requirements . 7
4.1 Containers . 7
4.1.1 Closing and sealing . 7
4.1.2 Pressure test of container . 8
4.1.3 Degree of protection of the container . 8
4.1.4 Filling procedure . 8
4.1.5 Containers that are not external enclosures . 8
4.2 Filling material . 9
4.2.1 Material specification . 9
4.2.2 Documentation . 9
4.2.3 Testing . 9
4.3 Distances . 9
4.3.1 Distances through filling material . 9
4.3.2 Distances surrounding free space . 11
4.4 Connections . 12
4.4.1 Equipment . 12
4.4.2 Ex Components . 12
4.5 Capacitors . 12
4.6 Cells and batteries . 12
4.7 Temperature limitations under overload conditions . 12
4.8 Temperature limitations under malfunction conditions . 12
4.8.1 General . 12
4.8.2 Fuse . 12
4.8.3 Malfunction exclusions . 13
4.8.4 Protective devices for temperature limitation . 16
4.8.5 Power supply prospective short-circuit current . 16
5 Verifications and tests . 16
5.1 Type verifications and tests . 16
5.1.1 Pressure type test of container . 16
5.1.2 Verification of the degree of protection of the enclosure . 17
5.1.3 Dielectric strength test of the filling material . 17
5.1.4 Maximum temperatures . 17
5.2 Routine verifications and tests . 18
5.2.1 Routine pressure test of container . 18
5.2.2 Dielectric strength test of the filling material . 18
6 Marking . 19
7 Instructions. 20
Bibliography . 21
Figure 1 – Distances through filling material . 11
Figure 2 – Test arrangement for the dielectric strength test of the filling material . 19
Table 1 – Distances through the filling material. 10
Table 2 – Creepage distances and distances through filling material . 15
– 4 – IEC 60079-5:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 5: Equipment protection by powder filling “q”
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
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governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
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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
...
IEC 60079-5 ®
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CONSOLIDATED VERSION
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STANDARD
NORME
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Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent "q"
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IEC 60079-5 ®
Edition 4.1 2022-05
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent "q"
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.260.20 ISBN 978-2-8322-5711-1
IEC 60079-5 ®
Edition 4.1 2022-05
CONSOLIDATED VERSION
REDLINE VERSION
VERSIO N REDLINE
colour
inside
Explosive atmospheres –
Part 5: Equipment protection by powder filling "q"
Atmosphères explosives –
Partie 5: Protection du matériel par remplissage pulvérulent "q"
– 2 – IEC 60079-5:2015+AMD1:2022 CSV
© IEC 2022
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Constructional requirements . 7
4.1 Containers . 7
4.1.1 Closing and sealing . 7
4.1.2 Pressure test of container . 8
4.1.3 Degree of protection of the container . 8
4.1.4 Filling procedure . 8
4.1.5 Containers that are not external enclosures . 8
4.2 Filling material . 9
4.2.1 Material specification . 9
4.2.2 Documentation . 9
4.2.3 Testing . 9
4.3 Distances . 9
4.3.1 Distances through filling material . 9
4.3.2 Distances surrounding free space . 11
4.4 Connections . 12
4.4.1 Equipment . 12
4.4.2 Ex Components . 12
4.5 Capacitors . 12
4.6 Cells and batteries . 12
4.7 Temperature limitations under overload conditions. 12
4.8 Temperature limitations under malfunction conditions . 12
4.8.1 General . 12
4.8.2 Fuse . 12
4.8.3 Malfunction exclusions . 13
4.8.4 Protective devices for temperature limitation. 16
4.8.5 Power supply prospective short-circuit current . 16
5 Verifications and tests . 16
5.1 Type verifications and tests . 16
5.1.1 Pressure type test of container . 16
5.1.2 Verification of the degree of protection of the enclosure . 17
5.1.3 Dielectric strength Insulation resistance test of the filling material . 17
5.1.4 Maximum temperatures . 17
5.2 Routine verifications and tests . 18
5.2.1 Routine pressure test of container . 18
5.2.2 Dielectric strength Insulation resistance test of the filling material . 18
6 Marking . 19
7 Instructions . 20
Bibliography . 21
Figure 1 – Distances through filling material . 11
© IEC 2022
Figure 2 – Test arrangement for the dielectric strength insulation resistance test of the
filling material . 19
Table 1 – Distances through the filling material . 10
Table 2 – Creepage distances and distances through filling material. 15
– 4 – IEC 60079-5:2015+AMD1:2022 CSV
© IEC 2022
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 5: Equipment protection by powder filling “q”
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 d
...
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