Caplights for use in mines susceptible to firedamp - Part 1: General requirements - Construction and testing in relation to the risk of explosion (IEC 60079-35-1:2011)

This part of IEC 60079-35 specifies requirements for the construction, testing and marking of caplights, including caplights with a point of connection for other equipment, for use in mines susceptible to firedamp (Group I - electrical equipment for explosive gas atmospheres as defined in IEC 60079-0). It deals only with the risk of the caplight becoming a source of ignition. The requirements for performance are in IEC 60079-35-2.1 This standard supplements and modifies the general requirements of IEC 60079-0 except as indicated in Table 1. Where a requirement of this standard conflicts with a requirement of IEC 60079-0, the requirements of this standard take precedence. Compliance with this standard will provide an EPL of Mb (see 4.1 of this standard). If an EPL of Ma is required, the caplight will need to conform to the requirements of 4.2 of this standard, which in turn refers to IEC 60079-11. It is expected that from time to time, caplights conforming to this standard (EPL Mb) will operate in atmospheres where the firedamp exceeds statutory levels that require the withdrawal of people from the high firedamp atmosphere to a non-hazardous area. In designing equipment for operation in conditions other than those given above, this standard may be used as guidance; however, additional testing may be required. Where a caplight is assessed as intrinsically safe equipment, Ex ia, conforming to IEC 60079- 11 only the clauses/subclauses listed in 4.2 require application.

Kopfleuchten für die Verwendung in schlagwettergefährdeten Grubenbauen - Teil 35-1: Allgemeine Anforderungen - Konstruktion und Prüfung in Relation zum Explosionsrisiko (IEC 60079-35-1:2011)

Lampes-chapeaux utilisables dans les mines grisouteuses - Partie 1: Exigences générales - Construction et essais liés au risque d'explosion (CEI 60079-35-1:2011)

La CEI 60079-35-1:2011 spécifie les exigences pour la construction, les essais et le marquage des lampes-chapeaux, y compris les lampes-chapeaux avec un point de connexion pour d'autres matériels, utilisables dans les mines grisouteuses (Groupe I - matériels électriques pour les atmosphères explosives gazeuses comme définies dans la CEI 60079-0). Elle traite uniquement du risque, présenté par une lampe-chapeau, de devenir une source d'inflammation. Les exigences d'aptitude à la fonction se trouvent dans la CEI 60079-35-2. La présente norme complète et modifie les exigences générales de la CEI 60079-0, excepté pour ce qui est indiqué dans le Tableau 1. Cette première édition annule et remplace la deuxième édition de la CEI 62013-1, parue en 2005, et constitue une révision technique générale. Les différences techniques principales par rapport à l'édition précédente sont:  - l'introduction d'un article unique relatif à la construction du matériel, remplaçant les différents articles spécifiques pour le projecteur, la batterie, le câble et les contacts extérieurs de charge;  - la suppression des indications concernant la température de surface, la reformulation des énoncés relatifs aux lignes de fuite et aux distances dans l'air, et l'adjonction d'indications concernant la protection thermique, les ensembles électroniques et les circuits additionnels;  - une référence spécifique aux éléments au lithium;  - l'adjonction d'indications concernant la recharge de la batterie et la protection contre la décharge sévère.

Rudarske naglavne svetilke za uporabo v rudnikih, kjer se lahko pojavi jamski eksplozivni plin - 1. del: Splošne zahteve - Konstruiranje in preskušanje zaradi tveganja eksplozije (IEC 60079-35-1:2011)

Ta del IEC 60079-35 določa zahteve za konstruiranje, preskušanje in označevanje rudarskih naglavnih svetilk, vključno z rudarskimi naglavnimi svetilkami s priključkom za drugo opremo, za uporabo v rudnikih, kjer se lahko pojavi jamski eksplozivni plin (skupina I – električna oprema za eksplozivne plinske atmosfere, kot je opredeljeno v IEC 60079-0). Obravnava le tveganje, da bi rudarska naglavna svetilka postala vir vžiga. Zahteve za delovanje so navedene v IEC 60079-35-2.1. Ta standard dopolnjuje in spreminja splošne zahteve IEC 60079-0, razen kot je navedeno v preglednici 1. Kjer zahteva tega standarda nasprotuje zahtevi IEC 60079-0, imajo zahteve tega standarda prednost. Skladnost s tem standardom zagotavlja EPL Mb (glej točko 4.1 tega standarda). Če je zahtevan EPL Ma, mora rudarska naglavna svetilka ustrezati zahtevam iz točke 4.2 tega standarda, ki se sklicuje na IEC 60079-11. Pričakuje se, da rudarske naglavne svetilke, ki ustrezajo temu standardu (EPL Mb), občasno obratujejo v atmosferah, kjer jamski eksplozivni plin presega zakonske ravni, pri katerih je treba ljudi odstraniti iz atmosfere z veliko količino jamskega eksplozivnega plina v varno območje. Pri načrtovanju opreme za obratovanje v pogojih, ki niso navedeni zgoraj, se ta standard lahko uporablja kot vodilo, lahko pa je potrebno dodatno preskušanje. Kadar je rudarska naglavna svetilka ocenjena kot intrinzično varna oprema, Ex ia, v skladu z IEC 60079-11, je treba uporabiti le točke/podtočke, navedene v 4.2.

General Information

Status
Published
Public Enquiry End Date
27-Feb-2010
Publication Date
14-Sep-2011
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
30-Aug-2011
Due Date
04-Nov-2011
Completion Date
15-Sep-2011

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SLOVENSKI STANDARD
SIST EN 60079-35-1:2011
01-oktober-2011
1DGRPHãþD
SIST EN 62013-1:2006
Rudarske naglavne svetilke za uporabo v rudnikih, kjer se lahko pojavi jamski
eksplozivni plin - 1. del: Splošne zahteve - Konstruiranje in preskušanje zaradi
tveganja eksplozije (IEC 60079-35-1:2011)

Caplights for use in mines susceptible to firedamp - Part 1: General requirements -

Construction and testing in relation to the risk of explosion (IEC 60079-35-1:2011)

Kopfleuchten für die Verwendung in schlagwettergefährdeten Grubenbauen - Teil 35-1:

Allgemeine Anforderungen - Konstruktion und Prüfung in Relation zum Explosionsrisiko

(IEC 60079-35-1:2011)
Lampes-chapeaux utilisables dans les mines grisouteuses - Partie 1: Exigences

générales - Construction et essais liés au risque d'explosion (CEI 60079-35-1:2011)

Ta slovenski standard je istoveten z: EN 60079-35-1:2011
ICS:
29.260.20 (OHNWULþQLDSDUDWL]D Electrical apparatus for
HNVSOR]LYQDR]UDþMD explosive atmospheres
73.100.20 3UH]UDþHYDOQD Ventilation, air-conditioning
NOLPDWL]DFLMVNDLQ and illumination equipment
UD]VYHWOMHYDOQDRSUHPD
SIST EN 60079-35-1:2011 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 60079-35-1:2011
---------------------- Page: 2 ----------------------
SIST EN 60079-35-1:2011
EUROPEAN STANDARD
EN 60079-35-1
NORME EUROPÉENNE
August 2011
EUROPÄISCHE NORM
ICS 29.260.20 Supersedes EN 62013-1:2006
English version
Explosive atmospheres -
Part 35-1: Caplights for use in mines susceptible to firedamp -
General requirements -
Construction and testing in relation to the risk of explosion
(IEC 60079-35-1:2011)
Atmosphères explosives - Kopfleuchten für die Verwendung in
Partie 35-1: Lampes-chapeaux utilisables schlagwettergefährdeten Grubenbauen -
dans les mines grisouteuses - Teil 35-1: Allgemeine Anforderungen -
Exigences générales - Konstruktion und Prüfung in Relation zum
Construction et essais liés au risque Explosionsrisiko
d'explosion (IEC 60079-35-1:2011)
(CEI 60079-35-1:2011)

This European Standard was approved by CENELEC on 2011-06-30. 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 Central Secretariat 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 Central Secretariat 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,

Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia,

Spain, Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60079-35-1:2011 E
---------------------- Page: 3 ----------------------
SIST EN 60079-35-1:2011
EN 60079-35-1:2011 - 2 -
Foreword

The text of document 31/921/FDIS, future edition 1 of IEC 60079-35-1, prepared by IEC TC 31,

Equipment for explosive atmospheres, was submitted to the IEC-CENELEC parallel vote and was

approved by CENELEC as EN 60079-35-1 on 2011-06-30.
This European Standard supersedes EN 62013-1:2006.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN and CENELEC shall not be held responsible for identifying any or all such patent

rights.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2012-03-30
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-06-30

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and covers essential requirements of

EC Directive ATEX (94/9/EC). See Annex ZZ.
Annexes ZA, ZY and ZZ have been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60079-35-1:2011 was approved by CENELEC as a European

Standard without any modification.
__________
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SIST EN 60079-35-1:2011
- 3 - EN 60079-35-1:2011
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application 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 When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
IEC 60050-426 - International Electrotechnical Vocabulary - - -
Part 426: Equipment for explosive
atmospheres
IEC 60050-845 - International Electrotechnical Vocabulary - -
(IEV) -
Chapter 845: Lighting
IEC 60079-0 - Explosive atmospheres - EN 60079-0 -
Part 0: Equipment - General requirements
IEC 60079-1 - Explosive atmospheres - EN 60079-1 -
Part 1: Equipment protection by flameproof
enclosures "d"
IEC 60079-7 - Explosive atmospheres - EN 60079-7 -
Part 7: Equipment protection by increased
safety "e"
IEC 60079-11 - Explosive atmospheres - EN 60079-11 -
Part 11: Equipment protection by intrinsic
safety "i"
IEC 60127-2 - Miniature fuses - EN 60127-2 -
Part 2: Cartridge fuse-links
IEC 60332-1-1 - Tests on electric and optical fibre cables EN 60332-1-1 -
under fire conditions -
Part 1-1: Test for vertical flame propagation
for a single insulated wire or cable - Apparatus
IEC 60332-1-2 - Tests on electric and optical fibre cables EN 60332-1-2 -
under fire conditions -
Part 1-2: Test for vertical flame propagation
for a single insulated wire or cable -
Procedure for 1 kW pre-mixed flame
IEC 60664-3 - Insulation coordination for equipment within EN 60664-3 -
low-voltage systems -
Part 3: Use of coating, potting or moulding for
protection against pollution
UL 1642 - Standard for Lithium Batteries - -
---------------------- Page: 5 ----------------------
SIST EN 60079-35-1:2011
EN 60079-35-1:2011 - 4 -
Annex ZY
(informative)
Significant changes between EN 60079-35-1:2011 and EN 62013-1: 2006
This European Standard supersedes EN 62013-1:2006.
The significant changes with respect to EN 62013-1:2006 are as listed below.
Type
Significant Changes Clause Minor and Extension Major
editorial technical
changes changes
This first edition cancels and replaces EN 62013-1: X
2006, and constitutes a full technical revision.
The requirements of EN 60079-0 now apply to this Scope X
standard with the exceptions of the exclusions listed
in Table 1.
Provision has also been provided for a means to
assess caplights to EPL Ma.
The standard has been re-written to be more in-line X
with other EN 60079 series standards.
Table 1 introduced to identify the clauses of EN Table 1 X
60079-0 which are excluded.
The requirements for caplights conforming to EPL 4.1 X
Mb defined.
The additional requirements for caplights 4.2 X
conforming to EPL Ma defined.
Thermal protection of electronic components added. 5.10 X
Additional requirements applied to cells and 6.1 X
batteries.
Cells and batteries are now restricted to those 7 X
meeting the requirements of EN 60079-0.
Type verification testing, where applicable refers 8 X
back to the requirements in EN 60079-0

NOTE: The technical changes referred include the significant technical changes from the EN

revised but is not an exhaustive list of all modifications from EN 62013-1:2006.
---------------------- Page: 6 ----------------------
SIST EN 60079-35-1:2011
- 5 - EN 60079-35-1:2011
Explanations:
A) Definitions
Minor and editorial changes clarification
decrease of technical requirements
minor technical change
editorial corrections

Changes in a standard classified as ‘Minor and editorial changes’ refer to changes regarding the previous

standard, which modify requirements in an editorial or a minor technical way. Also changes of the wording

to clarify technical requirements without any technical change are classified as ‘Minor and editorial

changes’.

A reduction in level of existing requirement is also classified as ‘Minor and editorial changes’

Extension addition of technical options

Changes in a standard classified as ‘extension’ refers to changes regarding the previous standard, 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 ‘extensions’ will not have to be considered for products in conformity with the preceding edition.

Major technical change addition of technical requirements
increase of technical requirements

Changes in a standard classified as ‘Major technical change’ refer to changes regarding the previous

standard, which add new or increase the level of existing technical requirements, in a way that a product

in conformity with the preceding standard will not always be able to fulfil the requirements given in the

standard. ‘Major technical changes’ have to be considered for products in conformity with the preceding

edition. For every change classified as ‘Major Technical Change’ additional information is provided in

clause B) of the Annex ZY.

Note: These changes represent current technological knowledge . However, these changes should not

normally have an influence on equipment already placed on the market.
B) Information about the background of ‘Major Technical Changes’
None.
Instructions:

The manufacturer or his authorised representative in the Community is to draw up the instructions for use

in the required Community languages.
Marking:

The marking in this standard is to be supplemented/modified by the marking according to Directive

94/9/EC. Examples are given below.
European marking examples
Directive part Standard part Equipment example
Ε I M2 Ex I Mb EN 60079-35-1 (0°C ≤ Ta ≤ +40°C) Caplight suitable for EPL Mb

Ε I M1 Ex ia I Ma EN 60079-35-1 (-10°C ≤ Ta ≤ +40°C) Caplight suitable for EPL Ma

see also ATEX Guide 10.3 and Annex ZZ
---------------------- Page: 7 ----------------------
SIST EN 60079-35-1:2011
EN 60079-35-1:2011 - 6 -
Annex ZZ
(informative)
Coverage of essential requirements of the directive 94/9/EC

This European Standard has been prepared under a mandate given to CENELEC by the European

Commission and the European Free Trade Association and within its scope the standard covers only the

following essential requirements and out of those given in Annex II of the Directive 94/9/EC:

- ER 1.0.1 to ER 1.0.6;
- ER 1.1.1 to ER 1.1.3;
- ER 1.2.1 to ER 1.2.9;
- ER 1.3.1 to ER 1.3.5;
- ER 1.4.1 to ER 1.4.2;
- ER 2.0.1.1 to ER 2.0.1.4;
- ER 2.0.2.1 to ER 2.0.2.3;

Compliance with this standard provides one means of conformity with the specified essential

requirements of the Directive concerned.

WARNING: Other requirements and other EC Directives may be applicable to the products falling within

the scope of this standard.
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SIST EN 60079-35-1:2011
IEC 60079-35-1
Edition 1.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Explosive atmospheres –
Part 35-1: Caplights for use in mines susceptible to firedamp – General
requirements – Construction and testing in relation to the risk of explosion
Atmosphères explosives –
Partie 35-1: Lampes-chapeaux utilisables dans les mines grisouteuses –
Exigences générales – Construction et essais liés au risque d'explosion
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX R
ICS 29.260.20 ISBN 978-2-88912-518-0
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 9 ----------------------
SIST EN 60079-35-1:2011
– 2 – 60079-35-1  IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope ............................................................................................................................... 7

2 Normative references ..................................................................................................... 10

3 Terms and definitions ..................................................................................................... 10

4 Level of protection .......................................................................................................... 11

4.1 General ................................................................................................................. 11

4.2 Additional requirements for EPL “Ma” .................................................................... 12

4.3 Thermal ignition compliance .................................................................................. 12

4.4 Spark ignition compliance ...................................................................................... 12

5 Equipment construction .................................................................................................. 12

5.1 Enclosures ............................................................................................................ 12

5.1.1 Headpiece enclosure ................................................................................. 12

5.1.2 Battery enclosure ...................................................................................... 13

5.2 Cable .................................................................................................................... 13

5.3 External charging contacts .................................................................................... 13

5.4 Internal electrical connections ............................................................................... 13

5.5 Solid electrical insulating materials ........................................................................ 14

5.6 Internal wiring ....................................................................................................... 14

5.7 Supply of electrical power to other equipment ....................................................... 14

5.8 Creepage and clearance distances ........................................................................ 14

5.9 Assembled electrical connection ............................................................................ 14

5.10 Thermal protection ................................................................................................ 14

6 Overcurrent protection .................................................................................................... 15

6.1 General ................................................................................................................. 15

6.2 Fuse or thermal circuit-breaker .............................................................................. 15

6.3 Resistive safety ..................................................................................................... 15

7 Cells and batteries ......................................................................................................... 16

8 Type verifications and tests ............................................................................................ 16

8.1 Impact test ............................................................................................................ 16

8.2 Drop tests ............................................................................................................. 16

8.3 Degree of protection (IP) by enclosures ................................................................. 16

8.4 Test to verify the non-ignition of a representative electrolytic gas mixture or

firedamp by fuse or thermal circuit-breaker ............................................................ 17

8.5 Test to verify the non-ignition of a gas mixture by one strand of the cable

between the headpiece and the battery by thermal ignition .................................... 17

8.6 Test to verify the resistance of the cable sheath to fatty acids ............................... 17

8.7 Test to verify the resistance of the cable sheath to fire .......................................... 17

8.8 Test to verify the strength of cable entries, anchoring devices and cable ............... 17

8.9 Electrolyte leakage test for cells and batteries ....................................................... 18

8.10 Current-limiting resistor test .................................................................................. 18

8.10.1 Current-limiting resistor not protected by a non-replaceable

resettable fuse ........................................................................................... 18

8.10.2 Current-limiting resistor protected by a non-replaceable resettable

fuse ........................................................................................................... 18

8.10.3 Verification ................................................................................................ 18

---------------------- Page: 10 ----------------------
SIST EN 60079-35-1:2011
60079-35-1  IEC:2011 – 3 –

9 Marking .......................................................................................................................... 18

9.1 General ................................................................................................................. 18

9.2 Examples of marking ............................................................................................. 19

10 Instructions..................................................................................................................... 19

Figure 1 – Example of a caplight assembly ........................................................................... 11

Table 1 – Application or exclusion of specific clauses of IEC 60079-0 ..................................... 8

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SIST EN 60079-35-1:2011
– 4 – 60079-35-1  IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
EXPLOSIVE ATMOSPHERES –
Part 35-1: Caplights for use in mines susceptible to firedamp –
General requirements – Construction and testing
in relation to the risk of explosion
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 60079-35-1 has been prepared by IEC technical committee 31:

Equipment for explosive atmospheres.

This first edition cancels and replaces the second edition of IEC 62013-1, published in 2005,

and constitutes a full technical revision.

In addition to the general revision and updating of IEC 62013-1, the main technical

differences with respect to the previous edition are as follows:

a) the inclusion of Table 1 listing the application or exclusion of specific clauses of

IEC 60079-0;
b) redrafting in the style of other IEC 60079 series standards;

c) the introduction of a means to achieve an equipment protection level (EPL) of Ma;

---------------------- Page: 12 ----------------------
SIST EN 60079-35-1:2011
60079-35-1  IEC:2011 – 5 –

d) the introduction of a single clause relating to equipment construction replacing

individual specific clauses for the headpiece, battery, cable and external charging

contacts;

e) the deletion of statements relating to surface temperature, the rewording of statements

relating to creepage and clearance and the addition of statements relating to thermal

protection, electronic assemblies and additional circuitry;
f) specific reference to lithium cells;

g) the addition of statements relating to battery recharging and protection against deep

discharge.
The text of this standard is based on the following documents:
FDIS Report on voting
31/921/FDIS 31/938/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of the IEC 60079-35 series, under the general title: Explosive atmospheres –

Caplights for use in mines susceptible to firedamp, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
---------------------- Page: 13 ----------------------
SIST EN 60079-35-1:2011
– 6 – 60079-35-1  IEC:2011
INTRODUCTION

The general revision and updating of this second edition have been necessitated by the

advent of new technologies related to caplight design, in particular those related to lithium

batteries and light-emitting diode (LED) light sources, the growing practice of incorporating

electronic circuits and the introduction of intrinsically safe caplights which can be certified

without reference to performance requirements. It is intended that there should be a stronger

link between Part 1 (Construction) and Part 2 (Performance) of this Standard by upgrading

the reference in the Scope from a note to a requirement.

In addition, as this standard is now to become part of the IEC 60079 series, changes have

been made to bring it more in line with others in the series by cross referencing. This has

enabled a reduction in the number and length of clauses in the standard.
---------------------- Page: 14 ----------------------
SIST EN 60079-35-1:2011
60079-35-1  IEC:2011 – 7 –
EXPLOSIVE ATMOSPHERES –
Part 35-1: Caplights for use in mines susceptible to firedamp –
General requirements – Construction and testing
in relation to the risk of explosion
1 Scope

This part of IEC 60079-35 specifies requirements for the construction, testing and marking of

caplights, including caplights with a point of connection for other equipment, for use in mines

susceptible to firedamp (Group I – electrical equipment for explosive gas atmospheres as

defined in IEC 60079-0). It deals only with the risk of the caplight becoming a source of

ignition.
The requirements for performance are in IEC 60079-35-2.

This standard supplements and modifies the general requirements of IEC 60079-0 except as

indicated in Table 1. Where a requirement of this standard conflicts with a requirement of

IEC 60079-0, the requirements of this standard take precedence.

Compliance with this standard will provide an EPL of Mb (see 4.1 of this standard). If an EPL

of Ma is required, the caplight will need to conform to the requirements of 4.2 of this standard,

which in turn refers to IEC 60079-11.

It is expected that from time to time, caplights conforming to this standard (EPL Mb) will

operate in atmospheres where the firedamp exceeds statutory levels that require the

withdrawal of people from the high firedamp atmosphere to a non-hazardous area.

In designing equipment for operation in conditions other than those given above, this standard

may be used as guidance; however, additional testing may be required.

Where a caplight is assessed as intrinsically safe equipment, Ex ia, conforming to IEC 60079-

11 only the clauses/subclauses listed in 4.2 require application.
—————————

IEC 60079-35-2, Caplights for use in mines susceptible to firedamp – Part 2: Performance and other safety-

related matters (to be published).
---------------------- Page: 15 ----------------------
SIST EN 60079-35-1:2011
– 8 – 60079-35-1  IEC:2011
Table 1 – Application or exclusion of specific clauses of IEC 60079-0
Clause of IEC 60079-0
IEC 60079-0
clause
a a
Ed. 5.0 Ed. 6.0
application
Clause/subclause title (normative)
(2007) (2011)
1 1 Scope Applies
2 2 Normative references Applies
3 3 Terms and definitions Applies
4 4 Equipment grouping Applies
5 5 Temperatures Applies
6.1 6.1 Requirements for all equipment – General Applies

6.2 6.2 Requirements for all equipment – Mechanical strength of equipment Applies

6.3 6.3 Requirements for all equipment – Opening times Excluded
6.4 6.4 Requirements for all equipment – Circulating currents Excluded
6.5 6.5 Requirements for all equipment – Gasket retention Applies
Requirements for all equipment – Electromagnetic and ultrasonic
6.6 6.6 Applies
energy radiating equipment
7 7 Non-metallic enclosures and non-metallic parts of enclosures Applies
8 8 Metallic enclosures and metallic parts of enclosures Applies
9 9 Fasteners Applies
10 10 Interlocking devices Applies
11 11 Bushings Excluded
12 12 Materials used for cementing Applies
13 13 Ex components Applies
14 14 Connection facilities and terminal compartments Applies
15 15 Connection facilities for earthing or bonding conductors Excluded
16 16 Entries into enclosures Applies
17 17 Supplementary requirements for rotating electrical machines Excluded
18 18 Supplementary requirements for switchgear Excluded
19 19 Supplementary requirements for fuses Excluded
Supplementary requirements for plugs and soc
...

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