oSIST prEN IEC 60079:2024

SLOVENSKI STANDARD
01-september-2024
Eksplozivne atmosfere - 0. del: Oprema - Splošne zahteve
Explosive atmospheres - Part 0: Equipment - General requirements
Explosionsgefährdete Bereiche - Teil 0: Betriebsmittel - Allgemeine Anforderungen
Atmosphères explosives - Partie 0: Matériel - Exigences générales
Ta slovenski standard je istoveten z: prEN IEC 60079:2024
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.

31/1781/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60079-0 ED8
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2024-07-05 2024-09-27
SUPERSEDES DOCUMENTS:
31/1597/CD, 31/1617A/CC
IEC TC 31 : EQUIPMENT FOR EXPLOSIVE ATMOSPHERES
SECRETARIAT: SECRETARY:
United Kingdom Mr Tom Stack
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any, in this
CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
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(SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Explosive atmospheres - Part 0: Equipment - General requirements

PROPOSED STABILITY DATE: 2029
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions. You
may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without permis sion in
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31/1781/CDV – 2 –  IEC CDV 60079-0 © IEC:2024

NOTE FROM TC/SC OFFICERS:
Please refer to 31/1783/INF for the track version of the CDV.

IEC CDV 60079-0 © IEC:2024 – 3 – 31/1781/CDV

2 CONTENTS
3 CONTENTS . 1
4 FOREWORD .10
5 1 Scope .21
6 2 Normative references .22
7 3 Terms and definitions .24
8 4 Equipment grouping .45
9 4.1 General .45
10 4.2 Group I .45
11 4.3 Group II.45
12 4.4 Group III.46
13 4.5 Equipment for a particular explosive gas atmosphere .46
14 5 Temperatures .46
15 5.1 Environmental influences .46
16 5.1.1 Ambient temperature .46
17 5.1.2 External source of heating or cooling .46
18 5.1.3 Service temperature, T .47
S
19 5.2 Maximum surface temperature .47
20 5.2.1 Determination of maximum surface temperature .47
21 5.2.2 Limitation of maximum surface temperature .47
22 5.2.3 Small component temperature for Group I or Group II electrical equipment .49
23 5.2.4 Component temperature of smooth surfaces for Group I or Group II equipment50
24 6 Requirements for all equipment .50
25 6.1 General .50
26 6.2 Mechanical strength of equipment .50
27 6.3 Opening times .50
28 6.4 Circulating currents in enclosures .51
29 6.5 Gasket retention .51
30 6.6 Electromagnetic and ultrasonic energy radiating equipment .52
31 6.6.1 General .52
32 6.6.2 Ultrasonic sources .53
33 7 Non-metallic enclosures and non-metallic parts of enclosures .53
34 7.1 General .53
35 7.1.1 Applicability .53
36 7.1.2 Specification of materials .54
37 7.2 Thermal endurance .55
38 7.2.1 Tests for thermal endurance .55
39 7.2.2 Material selection .55
40 7.2.3 Alternative qualification of elastomeric sealing O-rings .55
41 7.3 Resistance to ultraviolet light .56
42 7.4 Electrostatic charges on external non-metallic materials .56
43 7.4.1 Applicability .56
44 7.4.2 Avoidance of a build-up of electrostatic charge for Group I or Group II .57

31/1781/CDV – 4 –  IEC CDV 60079-0 © IEC:2024

45 7.5 Attached external conductive parts .62
46 7.6 Electrostatic charges of cable sheaths .63
47 8 Metallic enclosures and metallic parts of enclosures .63
48 8.1 Material composition .63
49 8.2 Group I .63
50 8.3 Group II.63
51 8.4 Group III.63
52 8.5 Copper Alloys.64
53 9 Fasteners .64
54 9.1 General requirements for fasteners .64
55 9.2 Special fasteners .64
56 9.2.1 General .64
57 9.2.2 Holes for special fasteners .65
58 10 Interlocking devices .66
59 11 Bushings .66
60 12 (Reserved for future use) .66
61 13 Ex Components .66
62 13.1 General .66
63 13.2 Mounting .67
64 13.3 Internal mounting .67
65 13.4 External mounting .67
66 13.5 Ex Component certificate .67
67 14 Connection facilities .67
68 14.1 General .67
69 14.2 Type of Protection .67
70 14.3 Creepage and clearance .68
71 15 Connection facilities for earthing or bonding conductors .68
72 15.1 Equipment requiring earthing or bonding .68
73 15.1.1 Internal earthing.68
74 15.1.2 External bonding .68
75 15.1.3 Electrostatic bonding .68
76 15.2 Equipment not requiring earthing.68
77 15.3 Size of protective earthing conductor connection .69
78 15.4 Size of equipotential bonding conductor connection .69
79 15.5 Protection against corrosion .69
80 15.6 Secureness of electrical connections.69
81 15.7 Internal earth continuity plate .69
82 16 Entries into enclosures .70
83 16.1 General .70
84 16.2 Identification of entries .70
85 16.3 Cable glands .70
86 16.4 Blanking elements .71
87 16.5 Thread adapters .71
88 16.6 Temperature at branching point and entry point .71
89 17 Supplementary requirements for electric machines .72
90 17.1 General .72

IEC CDV 60079-0 © IEC:2024 – 5 – 31/1781/CDV

91 17.2 Ventilation and cooling .72
92 17.2.1 Openings .72
93 17.2.2 External fans .73
94 17.2.3 Auxiliary motor cooling fans .73
95 17.2.4 Room ventilating fans .74
96 17.3 Bearings .
...