BS EN 60079-15:2010
Explosive atmospheres Equipment protection by type of protection "n"
| Standard number: | BS EN 60079-15:2010 |
| Pages: | 84 |
| Released: | 2016-11-30 |
| ISBN: | 978 0 580 96227 1 |
| Status: | Standard |
BS EN 60079-15:2010
This standard BS EN 60079-15:2010 Explosive atmospheres is classified in these ICS categories:
- 29.260.20 Electrical apparatus for explosive atmospheres
This part of IEC 60079 specifies requirements for the construction, testing and marking for Group II electrical equipment with type of protection, "n" intended for use in explosive gas atmospheres. This standard applies to electrical equipment where the rated voltage does not exceed 15 kV r.m.s. a.c. or d.c.
This part of IEC 60079 is applicable to non-sparking electrical equipment and also to electrical equipment with parts or circuits producing arcs or sparks or having hot surfaces which, if not protected in one of the ways specified in this standard, could be capable of igniting a surrounding explosive gas atmosphere. This standard describes several different methods by which this can be achieved which may be combined with other methods described in IEC 60079‑0 .
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 requirement of this standard takes precedence.
| Clause of IEC 60079‑0 | IEC 60079‑0 clause application to IEC 60079‑15 | ||||
|---|---|---|---|---|---|
| Ed. 5.0 (2007) (informative) | Ed. 6.0 1 (future edition) (informative) | Clause / Subclause title (normative) | Protected spar king | Non sparking | Restricted breathing |
| nC | nA | nR | |||
| 4 | 4 | Equipment grouping | Applies | Applies | Applies |
| 4.1 | 4.1 | Group I | Excluded | Excluded | Excluded |
| 4.2 | 4.2 | Group II | Applies | Applies | Applies |
| 4.3 | 4.3 | Group III | Excluded | Excluded | Excluded |
| 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 | Applies |
| 5.3.2.1 | 5.3.2.1 | Group I electrical equipment | Excluded | Excluded | Excluded |
| 5.3.2.2 | 5.3.2.2 | Group II electrical equipment | Applies | Applies | Applies |
| 5.3.2.3 | 5.3.2.3 | Group III electrical equipment | Excluded | Excluded | Excluded |
| 5.3.3 | 5.3.3 | Small component temperature for Group I and Group II electrical equipment | Applies | Applies | Excluded |
| 6.1 | 6.1 | General | Applies | Applies | Applies |
| 6.2 | 6.2 | Mechanical strength | Applies | Applies | Applies |
| 6.3 | 6.3 | Opening times | Excluded | Excluded | Applies |
| 6.4 | 6.4 | Circulating currents | Applies | Applies | Applies |
| 6.5 | 6.5 | Gasket retention | Applies | Applies | Applies |
| 6.6 | 6.6 | Electromagnetic and ultrasonic radiating equipment | Applies | Applies | Applies |
| 7.1.1 | 7.1.1 | Applicability | Applies | Applies | Applies |
| 7.1.2 | 7.1.2 | Specification of materials | Applies | Applies | Applies |
| 7.1.3 | 7.1.2.2 | Plastic materials | Applies | Applies | Applies |
| 7.1.4 | 7.1.2.3 | Elastomeric materials | Applies | Applies | Applies |
| 7.2 | 7.2 | Thermal endurance | Applies | Applies | Applies |
| 7.3 | 7.3 | Resistance to light | Applies | Applies | Applies |
| 7.4 | 7.4 | Electrostatic charges on external non-metallic materials | Applies | Applies | Applies |
| 7.5 | 9.1 | Threaded holes | Applies | Applies | Applies |
| 8.1.1 | 8.2 | Group I | Excluded | Excluded | Excluded |
| 8.1.2 | 8.3 | Group II | Applies | Applies | Applies |
| 8.1.3 | 8.4 | Group III | Excluded | Excluded | Excluded |
| 8.2 | 9.1 | Threaded holes | Applies | Applies | Applies |
| 9.1 | 9.1 | General | Applies | Applies | Applies |
| 9.2 | 9.2 | Special fasteners | Excluded | Excluded | Excluded |
| 9.3 | 9.3 | Holes for special fasteners | Excluded | Excluded | Excluded |
| 10 | 10 | Interlocking devices | Excluded | Excluded | Excluded |
| 11 | 11 | Bushings | Applies | Applies | Applies |
| 12 | 12 | Materials used for cementing | Modified | Modified | Modified |
| 13 | 13 | Ex components | Applies | Applies | Applies |
| 14 | 14 | Connection facilities and termination compartments | Modified | Modified | Modified |
| 15 | 15 | Connection facilities for earthing and bonding conductors | Applies | Applies | Applies |
| 16 | 16 | Entries into enclosures | Applies | Applies | Applies |
| 17 | 17 | Supplementary requirements for rotating electrical machines | Excluded | Modified | Excluded |
| 18 | 18 | Supplementary requirements for switchgear | Applies | Applies | Applies |
| 19 | 19 | Supplementary requirements for fuses | Modified | Modified | Modified |
| 20 | 20 | Supplementary requirements for plugs and sockets | Modified | Modified | Modified |
| 21 | 21 | Supplementary requirements for luminaires | Modified | Modified | Modified |
| 22 | 22 | Supplementary requirements for caplights and handlights | Applies | Applies | Applies |
| 23 | 23 | Equipment incorporating cells and batteries | Modified | Modified | Modified |
| 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 | 26.4 | Tests of enclosures | Applies | Applies | Applies |
| 26.4.1.1 | 26.4.1.1 | Metallic enclosures, metallic parts of enclosures and glass parts of enclosures | Applies | Applies | Applies |
| 26.4.1.2.1 | 26.4.1.2.1 | Group I electrical equipment | Excluded | Excluded | Excluded |
| 26.4.1.2.2 | 26.4.1.2.2 | Group II and Group III electrical equipment | Applies | Applies | Applies |
| 26.4.2 | 26.4.2 | Resistance to impact | Applies | Applies | Applies |
| 26.4.3 | 26.4.3 | Drop test | Applies | Applies | Applies |
| 26.4.4 | 26.4.4 | Acceptance criteria | Applies | Applies | Applies |
| 26.4.5 | 26.4.5 | Degree of protection by enclosure | Applies | Applies | Applies |
| 26.5 | 26.5 | Thermal tests | Applies | Applies | Applies |
| 26.6 | 26.6 | Torque test for bushings | Applies | Applies | Applies |
| 26.7 | 26.7 | Non-metallic enclosures or non-metallic parts of enclosures | Modified | Modified | Modified |
| 26.8 | 26.8 | Thermal endurance to heat | Modified | Modified | Modified |
| 26.9 | 26.9 | Thermal endurance to cold | Applies | Applies | Applies |
| 26.10 | 26.10 | Resistance to light | Applies | Applies | Applies |
| 26.11 | 26.11 | Resistance to chemical agents for Group I electrical equipment | Excluded | Excluded | Excluded |
| 26.12 | 26.12 | Earth continuity | Applies | Applies | Applies |
| 26.13 | 26.13 | Surface resistance test of parts of enclosures of non-metallic materials | Applies | Applies | Applies |
| 26.14 | - | Charging tests | Applies | Applies | Applies |
| 26.15 | 26.14 | Measurement of capacitance | Applies | Applies | Applies |
| 27 | 27 | Routine tests | Applies | Applies | Applies |
| 28 | 28 | Manufacturers responsibility | Applies | Applies | Applies |
| 29 | 29 | Marking | Applies | Applies | Applies |
| 30 | 30 | Instructions | Applies | Applies | Applies |
| Annex A | Annex A | Supplementary requirements for Ex cable glands | Applies | Applies | Applies |
| Annex B | Annex B | Requirements for Ex components | Applies | Applies | Applies |
| Annex C | Annex C | Example of rig for resistance to impact test | Applies | Applies | Applies |
| Annex D | Annex D | Introduction to an alternative risk assessment method encompassing “equipment protection levels” fro Ex equipment | Applies | Applies | Applies |
Applies : this requirement of IEC 60079‑0 is applied without change.
Excluded : this requirement of IEC 60079‑0 does not apply.
Modified : this requirement of IEC 60079‑0 is modified as detailed in this standard.
The clause number in the above table is shown for information only. The applicable requirements of IEC 60079‑0 are identified by the clause title which is normative. This document was written against the specific requirements of IEC 60079‑0 (ed. 5.0). 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.
A non-incendive component is limited in use to the particular circuit for which it has been shown to be non-ignition capable and, therefore, cannot be separately assessed as complying with this standard.
Compliance with this standard does not imply any removal of, or lowering of the requirements of any other standard with which the electrical equipment complies.
This part of IEC 60079 supplements, and may enhance, the requirements for equipment for normal industrial applications. Where compliance with other IEC standards is indicated, such as IEC 60034 for motors and IEC 60598‑2 for luminaires, proving compliance to those standards is normally the responsibility of the manufacturer.
Type of protection “n” provides Equipment Protection Level (EPL) Gc. For further information, see IEC 60079‑0 .