SIST EN IEC 60079-15:2019

SLOVENSKI STANDARD
SIST EN IEC 60079-15:2019
01-julij-2019
Nadomešča:
SIST EN 60079-15:2011
Eksplozivne atmosfere - 15. del: Zaščita opreme s protieksplozijsko zaščito "n"
Explosive atmospheres - Part 15: Equipment protection by type of protection "n"
Explosionsfähige Atmosphäre - Teil 15: Geräteschutz durch Zündschutzart "n"
Atmosphères explosives - Partie 15: Protection du matériel par mode de protection "n"
Ta slovenski standard je istoveten z: EN IEC 60079-15:2019
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
SIST EN IEC 60079-15:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60079-15:2019

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SIST EN IEC 60079-15:2019


EUROPEAN STANDARD EN IEC 60079-15

NORME EUROPÉENNE

EUROPÄISCHE NORM
April 2019
ICS 29.260.20 Supersedes EN 60079-15:2010
English Version
Explosive atmospheres - Part 15: Equipment protection by type
of protection "n"
(IEC 60079-15:2017)
Atmosphères explosives - Partie 15: Protection du matériel Explosionsfähige Atmosphäre - Teil 15: Geräteschutz durch
par mode de protection "n" Zündschutzart "n"
(IEC 60079-15:2017) (IEC 60079-15:2017)
This European Standard was approved by CENELEC on 2018-01-12. 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
© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60079-15:2019 E

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SIST EN IEC 60079-15:2019
EN IEC 60079-15:2019 (E)
European foreword
The text of document (31/1339/FDIS), future edition 5 of IEC 60079-15, prepared by IEC/TC 31
"Equipment for explosive atmospheres" was submitted to the IEC-CENELEC parallel vote and
approved by CENELEC as EN IEC 60079-15:2019.

The following dates are fixed:
(dop) 2019-10-19
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2022-04-19
standards conflicting with the
document have to be withdrawn

This document supersedes EN 60079-15:2010.

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.

This document has been prepared under a mandate given to CENELEC by the European Commission
and the European Free Trade Association, and supports essential requirements of EU Directive(s).

For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this
document.

Endorsement notice
The text of the International Standard IEC 60079-15:2017 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 60079-1 NOTE Harmonized as EN 60079-1.
IEC 60079-2 NOTE Harmonized as EN 60079-2.
IEC 60079-11 NOTE Harmonized as EN 60079-11.
IEC 60079-17 NOTE Harmonized as EN 60079-17.
IEC 60079-18 NOTE Harmonized as EN 60079-18.
IEC 60297 (series) NOTE Harmonized in EN 60297 series.
IEC 61347-2-1 NOTE Harmonized as EN 61347-2-1.
2

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SIST EN IEC 60079-15:2019
EN IEC 60079-15:2019 (E)
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 60079-0 -  Explosive atmospheres - Part 0: EN IEC 60079-0 2018
Equipment - General requirements
IEC 60079-7 -  Explosive atmospheres - Part 7: EN 60079-7 2015
Equipment protection by increased safety
"e"

3

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SIST EN IEC 60079-15:2019
EN IEC 60079-15:2019 (E)
Annex ZZ
(informative)

Relationship between this European standard and the essential requirements
of 2014/34/EU [2014 OJ L96] aimed to be covered

This European standard has been prepared under a Commission’s standardisation request
M/BC/CEN/92/46 to provide one voluntary means of conforming to essential requirements of
2014/34/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 equipment and protective systems intended for use in
potentially explosive atmospheres (recast).

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 essential requirements
of that Directive, and associated EFTA regulations.

Table ZZ.1 – Correspondence between this European standard and Annex II of Directive
2014/34/EU [2014 OJ L96]
Essential Requirements of Clause(s) / sub-clause(s)
Remarks / Notes
2014/34/EU of this EN
1.0.1. Entire Standard Second indent only
1.0.2. 3.7 and note In addition to EN 60079-0
1.0.3. Reference to EN 60079-0
1.0.4. Reference to EN 60079-0
1.0.5. And reference to EN 60079-0
1.0.6. Reference to EN 60079-0
1.1. Reference to EN 60079-0
1.2.1. Reference to EN 60079-0
1.2.2. Reference to EN 60079-0
1.2.3. Not applicable. Release of
flammable material is not
foreseen
1.2.4. Not applicable. Dust
atmospheres and deposits are
out of scope
1.2.5. Reference to EN 60079-0
1.2.6. Warning label deemed
adequate for Category 3
Equipment
1.2.7. Reference to EN 60079-0 and
relevant standards for normal
industrial applications
1.2.8. Not specifically applied to
Category 3 Equipment but
covered in general for normal
conditions by the installation
requirements in EN 60079-14
1.2.9. Not applicable
1.3.1. Reference to EN 60079-0, plus
the principle of Ex n protection
throughout standard
1.3.2. Reference to EN 60079-0
1.3.3. Reference to EN 60079-0
1.3.4. Not applicable
1.3.5. Not applicable
1.4. Reference to EN 60079-0
1.5. Not applicable
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SIST EN IEC 60079-15:2019
EN IEC 60079-15:2019 (E)
1.6.1. to 1.6.3 Not applicable
1.6.4. Reference to EN 60079-0
1.6.5. Not applicable
2.0. 2.1 and 2.2 Not applicable. Out of scope
2.3.1. Entire standard And reference to EN 60079-0
2.3.2. Not applicable. Out of scope
3. Not applicable. Out of scope

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.

5

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SIST EN IEC 60079-15:2019

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SIST EN IEC 60079-15:2019



IEC 60079-15

®


Edition 5.0 2017-12




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Explosive atmospheres –

Part 15: Equipment protection by type of protection "n"




Atmosphères explosives –

Partie 15: Protection du matériel par mode de protection «n»















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.260.20 ISBN 978-2-8322-5047-1



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 60079-15:2019
– 2 – IEC 60079-15:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 9
2 Normative references . 15
3 Terms and definitions . 16
4 General . 17
4.1 Equipment grouping and temperature classification . 17
4.2 Potential ignition sources . 17
4.3 Equipment requirements . 17
5 Maximum surface temperatures . 17
6 Requirements for electrical equipment . 18
6.1 General . 18
6.2 Electric strength insulation from earth or frame . 18
7 Requirements for non-incendive components. 18
7.1 Type testing . 18
7.2 Circuit limitations . 18
8 Requirements for hermetically sealed devices . 18
9 Requirements for sealed devices . 19
9.1 Non-metallic materials . 19
9.2 Opening . 19
9.3 Internal spaces . 19
9.4 Handling . 19
9.5 Gasket and seals . 19
9.6 Type tests . 19
10 Requirements for restricted-breathing enclosures . 19
10.1 General . 19
10.2 Constructional requirements . 20
10.2.1 Type of equipment . 20
10.2.2 Cells and batteries . 20
10.2.3 Cable glands and conduit entries . 20
10.2.4 Operating rods, spindles and shafts . 21
10.2.5 Windows . 21
10.2.6 Gasket and seal requirements . 21
10.2.7 Non-resilient seals . 21
10.2.8 Test port . 22
10.2.9 Internal fans . 23
10.3 Temperature limitation . 23
10.4 Additional requirements for restricted-breathing luminaires . 23
10.4.1 Mounting arrangement . 23
10.4.2 Reflectors . 23
10.4.3 Surface temperatures of restricted-breathing luminaires . 23
11 Type Tests . 24
11.1 Tests for non incendive components . 24
11.1.1 Preparation of non-incendive component samples . 24
11.1.2 Test conditions for non-incendive components . 24
11.2 Tests for sealed devices . 25

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SIST EN IEC 60079-15:2019
IEC 60079-15:2017 © IEC 2017 – 3 –
11.2.1 Conditioning . 25
11.2.2 Voltage test . 25
11.2.3 Leakage tests on sealed devices . 25
11.3 Type test requirements for restricted-breathing enclosures . 26
11.3.1 General . 26
11.3.2 Equipment where the volume of the enclosure will be unchanged due to
pressure . 26
11.3.3 Alternative type test for equipment where the volume of the enclosure
changes due to pressure . 26
12 Routine verifications and tests . 27
12.1 Electric strength test . 27
12.2 Routine test requirements for restricted-breathing enclosures . 27
12.2.1 General . 27
12.2.2 Test procedure . 27
12.3 Routine temperature rise test . 28
12.4 Temperature calculation . 28
13 Marking . 29
13.1 General . 29
13.2 Examples of marking . 29
13.3 Warning markings . 29
14 Documentation . 29
15 Instructions . 30
Bibliography . 31

Table 1 – Relationship of IEC 60079-15 to IEC 60079-0 . 9
Table 2 – Text of warning markings . 29

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SIST EN IEC 60079-15:2019
– 4 – IEC 60079-15:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

EXPLOSIVE ATMOSPHERES –

Part 15: Equipment protection by type of protection "n"

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 60079-15 has been prepared by IEC technical committee 31:
Equipment for explosive atmospheres.
This fifth edition cancels and replaces the fourth edition, published in 2010, and constitutes a
technical revision.
This edition includes the following significant changes with respect to the previous edition:
The text of this International Standard is based on the following documents:
FDIS Report on voting
31/1339/FDIS 31/1355/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.

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SIST EN IEC 60079-15:2019
IEC 60079-15:2017 © IEC 2017 – 5 –
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
This International Standard is to be read in conjunction with IEC 60079-0.
A list of all parts of the IEC 60079 series, under the general title: Explosives atmospheres,
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 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 60079-15:2019
– 6 – IEC 60079-15:2017 © IEC 2017
Type
Changes Clause Minor and Extension Major
editorial technical
changes changes
Requirements for enclosed break devices have -  C1
been removed
Requirements for type of protection “nA” has -  C2
been removed
Scope has been updated to allow equipment with 1 X
internal working voltages over 15 kV such as
starters for HID luminaires
Definition for cable sealing box removed 3 X
Definitions for creepage distance and clearance 3 X
removed as they are now in 60079-0
Definition of non-sparking device “nA” removed, 3  C2
as the concept has been transferred to 60079-7
Definition of duty cycle removed 3 X
Definition of enclosed break device moved as the 3  C1
concept has been transferred to 60079-1
Definition of hermetically sealed device revised 3 A1
Definition for normally sparking device added 3.2 X
Small component temperature clause removed, 5  C2
part of moving type of protection “nA” to 60079-7
Minimum degree of protection requirements; 6  C2
clearance, creepage and separation
requirements; determination of working voltage;
conformal coating; CTI requirement; Insulation
between conductive parts and measurement of
creepage and clearance requirements have been
removed.
Connection facilities and terminal compartment -  C2
requirements have been removed
Supplementary requirements for non-sparking -  C2
electrical rotating machines have been removed
Supplementary requirements for non-sparking -  C2
fuses and fuse assemblies have been removed
Supplementary requirements for non-sparking -  C2
plugs and sockets have been removed
Supplementary requirements for non-sparking -  C2
luminaires have been removed
Supplementary requirements for equipment -  C2
incorporating non-sparking cells and batteries
have been removed
Supplementary requirements for non-sparking low -  C2
power equipment have been removed
Supplementary requirements for non-sparking -  C2
current transformers have been removed
Requirements for other non-sparking electrical -  C2
equipment have been removed
General supplementary requirements for -  C2
equipment producing arcs, sparks or hot surfaces
have been removed
Requirements for enclosed break devices have -  C1
been removed
Voltage and current limitations added for non- 7.2  C6
incendive components.

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SIST EN IEC 60079-15:2019
IEC 60079-15:2017 © IEC 2017 – 7 –
Type
Changes Clause Minor and Extension Major
editorial technical
changes changes
The requirements for sealed devices have been 9.1 X
extended to require more documentation,
The +20K requirement for luminaire materials has 9.5  C2
been removed
Notes 1-3 have been removed, as this information 10.1 X
is covered elsewhere
Entry device requirements added 10.1 X
Industrial standard compliance and battery 10.2.1.2 X
requirements added
The exemption for manually operated sparking 10.2.1.2 X
devices moved to here, creepage and clearance
requirements in industrial standards added for
switching devices, and cell and battery
requirements added
Requirements for cable glands and conduit 10.2.3 X
entries have been clarified
Requirements for gasketed windows expanded to 10.2.5.2 X
allow a removable window mounted in a frame.
Requirement to include documentation on the 10.2.6  C4
thermal stability of gaskets or seals added
Requirements reworded for clarity 10.2.7 X
Requirements for “nR” enclosures fitted with fans 10.2.9  C5
added.
Type test requirements for enclosed break “nC” -  C1, C2
and “nA” equipment removed
The dielectric test after the leakage test for 11.2.2 X
sealed devices has been eliminated unless the
results of the leakage test are uncertain.
Tests for sealed devices, screw lampholders, -  C2
starters, lamps, ignitors, and ignitor pulses for
luminaires have been removed
All testing for batteries has been removed. -  C2
All testing for electrical machines removed -  C2
Routine test requirements re-written for sealed 12  C1, C2
components, non-incendive components and
restricted breathing equipment to take out the
testing for enclosed break and nA equipment
Preparation of non-incendive component samples 11.1.1  C3
Marking requirements modified to remove -  C1, C2
labelling requirements for enclosed break
components, nA equipment, and batteries.
Documentation requirements modified to remove 14  C1, C2
to remove labelling requirements for enclosed
break components, nA equipment, and batteries.
The instruction section has been expanded to 15 X
include new requirements
Annex A has been removed. -  C2

NOTE The technical changes referred to include the significance of technical changes in the revised IEC
Standard, but they do not form an exhaustive list of all modifications from the previous version.

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SIST EN IEC 60079-15:2019
– 8 – IEC 60079-15:2017 © IEC 2017
Explanation of the types of changes:
A) Definitions
1) Minor and editorial changes:
• Clarification
• Decrease of technical requirements
• Minor technical change
• Editorial corrections
These are changes which modify requirements in an editorial or a minor technical way.
They include changes of the wording to clarify technical requirements without any
technical change, or a reduction in level of existing requirement.
2) Extension: Addition of technical options
These are changes which add new or modify existing technical requirements, in a way
that new options are given, but without increasing requirements for equipment that was
fully compliant with the previous standard. Therefore, these will not have to be
considered for products in conformity with the preceding edition.
3) Major technical changes:
• addition of technical requirements
• increase of technical requirements
These are changes to technical requirements (addition, increase of the level or
removal) made in a way that a product in conformity with the preceding edition will not
always be able to fulfil the requirements given in the later edition. These changes have
to be considered for products in conformity with the preceding edition. For these
changes additional information is provided in Clause B below
...