prEN IEC 60079-46:2025
(Main)Explosive atmospheres - Part 46: Equipment assemblies
Explosive atmospheres - Part 46: Equipment assemblies
Atmosphères explosives - Partie 46: Assemblages d'appareils
Eksplozivne atmosfere - 46. del: Sklopi opreme
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2025
Eksplozivne atmosfere - 46. del: Sklopi opreme
Explosive atmospheres - Part 46: Equipment assemblies
Atmosphères explosives - Partie 46: Assemblages d'appareils
Ta slovenski standard je istoveten z: prEN IEC 60079-46:2025
ICS:
29.260.20 Električni aparati za Electrical apparatus for
eksplozivna ozračja explosive atmospheres
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
31/1871/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-46 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-07-04 2025-09-26
SUPERSEDES DOCUMENTS:
31/1831/CD, 31/1857A/CC
IEC TC 31 : EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
United Kingdom Mr Tom Stack
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):
ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
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to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for submitting ISC
clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).
TITLE:
Explosive atmospheres - Part 46: Equipment assemblies
PROPOSED STABILITY DATE: 2029
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
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IEC CDV 60070-46 © IEC 2025
1 CONTENTS
3 FOREWORD . 4
4 INTRODUCTION . 9
5 1 Scope . 10
6 2 Normative references . 11
7 3 Terms and definitions . 11
8 4 General requirements and specifications for equipment assemblies . 12
9 4.1 General . 12
10 4.2 Explosion protection details . 12
11 4.3 Hazardous area classification related to the equipment assembly . 13
12 4.3.1 General . 13
13 4.3.2 Equipment assembly with its own source of release . 13
14 4.4 Competencies . 14
15 5 Design of equipment assemblies . 14
16 5.1 General . 14
17 5.2 Ignition hazard assessment . 14
18 5.3 Ex Equipment . 14
19 5.3.1 Individual items . 14
20 5.3.2 Specific Conditions of Use and Schedule of Limitations . 15
21 5.3.3 Item list . 15
22 5.4 Calculations . 16
23 5.5 Wiring system . 16
24 5.6 Drawings. 17
25 6 Construction and assembly . 17
26 6.1 General . 17
27 6.2 System interfaces . 17
28 6.3 Inspection and testing . 17
29 6.4 Disassembly and reassembly . 18
30 6.5 Validation and documentation . 18
31 6.5.1 General . 18
32 6.5.2 Other material specifications . 20
33 6.5.3 Schedule Drawings . 20
34 6.6 Instructions . 20
35 7 Type and Routine Testing . 20
36 8 Certificate . 20
37 9 Marking . 21
38 9.1 General . 21
39 9.2 Determining equipment group marking . 22
40 9.3 Determining temperature class or maximum surface temperature marking . 22
41 9.4 Determining Equipment Protection Level (EPL) marking. 22
42 9.5 Determining ambient temperature range marking . 23
43 9.6 Determining degree of protection (IP Code) . 23
44 9.7 Example of marking . 23
45 Annex A (informative) Application of hazardous area classifications related to
46 equipment assembly configurations . 25
IEC CDV 60070-46 © IEC 2025
47 A.1 General . 25
48 A.2 Example equipment assembly configurations . 25
49 A.2.1 Example 1 . 25
50 A.2.2 Example 2 . 25
51 A.2.3 Example 3 . 26
52 A.2.4 Example 4 . 27
53 A.2.5 Example 5 . 28
54 A.3 Verifying area classifications . 28
55 Bibliography . 29
57 Figure A.2 – Source of release associated with the assembly, Hazardous area
58 classified due to this source of release does not extend beyond assembly boundaries,
59 and Intended to be installed in a hazardous area classified due to a source of release
60 external to the assembly . 26
61 Figure A.3 – Source of release associated with the assembly, Hazardous area
62 classified due to this source of release extends beyond assembly boundaries, and
63 Intended to be installed in a hazardous area classified due to a source of release
64 external to the assembly . 27
65 Figure A.4 – Source of release associated with the assembly, and Intended to be
66 installed in a hazardous area classified due to the source of release associated with
67 the assembly . 27
68 Figure A.5 – Source of release associated with the assembly, but Not intended to be
69 installed in a hazardous area classified due to any source of release external to the
70 assembly . 28
IEC CDV 60070-46 © IEC 2025
73 INTERNATIONAL ELECTROTECHNICAL COMMISSION
74 ____________
76 EXPLOSIVE ATMOSPHERES –
78 Part 46: Equipment Assemblies
80 FOREWORD
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118 such patent rights.
120 International Standard IEC 60079-46 has been prepared by IEC technical committee TC 31:
121 Equipment for explosive atmospheres.
122 This first edition cancels and replaces the first edition of IEC TS 60079-46 published in 2017
123 and constitutes a technical revision.
IEC CDV 60070-46 © IEC 2025
124 Users of this document are advised that interpretation sheets clarifying the interpretation of this
125 document can be published
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