Clause or subclause of IEC 60079-0 | IEC 60079-0 clause application to IEC 60079-11 |
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Intrinsically safe apparatus | Associated apparatus |
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Ed. 5.0 | Ed. 6.0 | Clause / Subclause title | Group I and Group II | Group III | |
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(informative) | (informative) | (normative) |
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1 | 1 | Scope | Applies | Applies | Applies |
2 | 2 | Normative references | Applies | Applies | Applies |
3 | 3 | Terms and definitions | Applies | Applies | Applies |
4 | 4 | Equipment grouping | Applies | Applies | Applies |
4.1 | 4.1 | Group I | Applies | Excluded | Applies |
4.2 | 4.2 | Group II | Applies | Excluded | Applies |
4.3 | 4.3 | Group III | Excluded | Applies | Applies |
4.4 | 4.4 | Equipment for a particular explosive atmosphere | Applies | Applies | Applies |
5.1 | 5.1 | Environmental influences | Applies | Applies | Applies |
5.1.1 | 5.1.1 | Ambient temperature | Applies | Applies | Applies |
5.1.2 | 5.1.2 | External source of heating or cooling | Applies | Applies | Applies |
5.2 | 5.2 | Service temperature | Applies | Applies | Applies |
5.3.1 | 5.3.1 | Determination of maximum surface temperature | Applies | Applies | Excluded |
5.3.2.1 | 5.3.2.1 | Group I electrical equipment | Applies | Excluded | Excluded |
5.3.2.2 | 5.3.2.2 | Group II electrical equipment | Applies | Excluded | Excluded |
5.3.2.3 | 5.3.2.3 | Group III electrical equipment | Excluded | Applies | Excluded |
5.3.3 | 5.3.3 | Small component temperature for Group I or Group II electrical equipment | Applies | Excluded | Excluded |
6.1 | 6.1 | General | Applies | Applies | Applies |
6.2 | 6.2 | Mechanical strength of equipment | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
6.3 | 6.3 | Opening times | Excluded | Excluded | Excluded |
6.4 | 6.4 | Circulating currents in enclosures (e.g. of large electrical machines) | Excluded | Excluded | Excluded |
6.5 | 6.5 | Gasket retention | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
6.6 | 6.6 | Electromagnetic and ultrasonic radiating equipment | Applies | Applies | Excluded |
7.1.1 | 7.1.1 | Applicability | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.1.2 | 7.1.2.1 | Specification of materials | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.1.3 | 7.1.2.2 | Plastic materials | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.1.4 | 7.1.2.3 | Elastomers | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.2 | 7.2 | Thermal endurance | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.3 | 7.3 | Resistance to light | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
7.4 | 7.4 | Electrostatic charges on external non-metallic materials | Applies | Applies | Excluded |
NR | 7.5 | Accessible metal parts | Applies | Applies | Excluded |
7.5 | NR | Threaded holes | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
8.1 | 8.1 | Material composition | Applies | Applies | Excluded |
8.1.1 | 8.2 | Group I | Applies | Excluded | Excluded |
8.1.2 | 8.3 | Group II | Applies | Excluded | Excluded |
8.1.3 | 8.4 | Group III | Excluded | Applies | Excluded |
8.2 | NR | Threaded holes | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
9 | 9 | Fasteners | Excluded | Excluded | Excluded |
10 | 10 | Interlocking devices | Excluded | Excluded | Excluded |
11 | 11 | Bushings | Excluded | Excluded | Excluded |
12 | 12 | Materials used for cementing | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
13 | 13 | Ex Components | Applies | Applies | Applies |
14 | 14 | Connection facilities and termination compartments | Excluded | Excluded | Excluded |
15 | 15 | Connection facilities for earthing or bonding conductors | Excluded | Excluded | Excluded |
16 | 16 | Entries into enclosures | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
17 | 17 | Supplementary requirements for rotating machines | Excluded | Excluded | Excluded |
18 | 18 | Supplementary requirements for switchgear | Excluded | Excluded | Excluded |
19 | 19 | Supplementary requirements for fuses | Excluded | Excluded | Excluded |
20 | 20 | Supplementary requirements for plugs, socket outlets and connectors | Excluded | Excluded | Excluded |
21 | 21 | Supplementary requirements for luminaires | Excluded | Excluded | Excluded |
22 | 22 | Supplementary requirements for caplights and handlights | Modified | Modified | Excluded |
23.1 | 23.1 | General | Applies | Applies | Applies |
23.2 | 23.2 | Batteries | Excluded | Excluded | Excluded |
23.3 | 23.3 | Cell types | Applies | Applies | Applies |
23.4 | 23.4 | Cells in a battery | Applies | Applies | Applies |
23.5 | 23.5 | Ratings of batteries | Applies | Applies | Applies |
23.6 | 23.6 | Interchangeability | Applies | Applies | Applies |
23.7 | 23.7 | Charging of primary batteries | Applies | Applies | Applies |
23.8 | 23.8 | Leakage | Applies | Applies | Applies |
23.9 | 23.9 | Connections | Applies | Applies | Applies |
23.10 | 23.10 | Orientation | Applies | Applies | Applies |
23.11 | 23.11 | Replacement of cells or batteries | Applies | Applies | Applies |
23.12 | 23.12 | Replaceable battery pack | Applies | Applies | Applies |
24 | 24 | Documentation | Applies | Applies | Applies |
25 | 25 | Compliance of prototype or sample with documents | Applies | Applies | Applies |
26.1 | 26.1 | General | Applies | Applies | Applies |
26.2 | 26.2 | Test configuration | Applies | Applies | Applies |
26.3 | 26.3 | Tests in explosive test mixtures | Applies | Applies | Applies |
26.4.1 | 26.4.1 | Order of tests | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.4.1.1 | 26.4.1.1 | Metallic enclosures, metallic parts of enclosures and glass parts of enclosures | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.4.1.2 | 26.4.1.2 | Non-metallic enclosures or non-metallic parts of enclosures | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.4.1.2.1 | 26.4.1.2.1 | Group I electrical equipment | Excluded except when 6.1.2.3 a) is applied | Excluded | Excluded except when 6.1.2.3 a) is applied |
26.4.1.2.2 | 26.4.1.2.2 | Group II and Group III electrical equipment | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.4.2 | 26.4.2 | Resistance to impact | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.4.3 | 26.4.3 | Drop test | Applies | Applies | Excluded except when 6.1.2.3 a) is applied |
26.4.4 | 26.4.4 | Acceptance criteria | Applies | Applies | Excluded except when 6.1.2.3 a) is applied |
26.4.5 | 26.4.5 | Degree of protection (IP) by enclosures | Applies | Applies | Applies |
26.5.1.1 | 26.5.1.1 | General | Applies | Applies | Excluded |
26.5.1.2 | 26.5.1.2 | Service temperature | Modified | Modified | Modified |
26.5.1.3 | 26.5.1.3 | Maximum surface temperature | Modified | Modified | Modified |
26.5.2 | 26.5.2 | Thermal shock test | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.5.3 | 26.5.3 | Small component ignition test (Group I and Group II) | Applies | Excluded | Excluded |
26.6 | 26.6 | Torque test for bushings | Excluded | Excluded | Excluded |
26.7 | 26.7 | Non-metallic enclosures or non-metallic parts of enclosures | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.8 | 26.8 | Thermal endurance to heat | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.9 | 26.9 | Thermal endurance to cold | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.10 | 26.10 | Resistance to light | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
26.11 | 26.11 | Resistance to chemical agents for Group I electrical equipment | Excluded except when 6.1.2.3 a) is applied | Excluded | Excluded |
26.12 | 26.12 | Earth continuity | Excluded | Excluded | Excluded |
26.13 | 26.13 | Surface resistance test of parts of enclosures of non-metallic materials | Applies | Applies | Excluded |
26.15 | 26.14 | Measurement of capacitance | Applies | Applies | Excluded |
NR | 26.15 | Verification of ratings of ventilating fans | Excluded | Excluded | Excluded |
NR | 26.16 | Alternative qualification of elastomeric sealing O-rings | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
27 | 27 | Routine tests | Applies | Applies | Applies |
28 | 28 | Manufacturer's responsibility | Applies | Applies | Applies |
29 | 29 | Marking | Applies | Applies | Applies |
30 | 30 | Instructions | Applies | Applies | Applies |
Annex A (Normative) | Annex A (Normative) | Supplementary requirements for cable glands | Excluded | Excluded | Excluded |
Annex B (Normative) | Annex B (Normative) | Requirements for Ex Components | Applies | Applies | Applies |
Annex C (Normative) | Annex C (Normative) | Example of rig for resistance to impact test | Applies | Applies | Excluded except when 6.1.2.3 a) is applied |
Annex D (Informative) | NR | Alternative risk assessment method encompassing equipment protection levels for Ex equipment | Applies | Applies | Applies |
Annex E (Informative) | Annex D (Informative) | Motors supplied by converters | Excluded | Excluded | Excluded |
NR | Annex E (Informative) | Temperature rise testing of electric machines | Excluded | Excluded | Excluded |
NR | Annex F (Informative) | Guideline flowchart for tests of non-metallic enclosures or nonmetallic parts of enclosures (26.4 ) | Excluded except when 6.1.2.3 a) is applied | Excluded except when 6.1.3 a) is applied. | Excluded except when 6.1.2.3 a) is applied |
Applies - This requirement of IEC 60079-0 is applied without change. |
Excluded - This requirement of IEC 60079-0 does not apply. |
Excluded except - This requirement of IEC 60079-0 does not apply except when the conditions stated are met. |
Modified - This requirement of IEC 60079-0 is modified as detailed in this standard. |
NR - No requirements. |
NOTE 1 The clause numbers in the above table are shown for information only. The applicable requirements of IEC 60079-0 are identified by the clause title which is normative. This table was written against the specific requirements of IEC 60079-0, ed. 6.0. The clause numbers for the previous edition are shown for information only. This is to enable the General requirements IEC 60079-0, ed. 5.0, to be used where necessary with this part of IEC 60079. Where there were no requirements, indicated by NR, or there is a conflict between requirements, the later edition requirements take precedence. |
NOTE 2 In the US, the authority having jurisdiction for underground mines is the Mine Safety and Health Administration (MSHA) of the federal government. Additional regulations beyond those detailed here will also apply. |