This part specifies requirements for the construction, testing and marking for Group II electrical apparatus with type of protection "n" intended for use in explosive gas atmospheres.
This standard is applicable to non-sparking electrical apparatus and also to electrical apparatus 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.
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 apparatus complies.
This standard supplements, and may enhance, the requirements for apparatus for normal industrial applications.
Note 1: This standard makes several specific references to GB 3836.1. It is not intended that apparatus with type of protection "n" should comply with GB 3836.1 in its entirety, or that the level of protection achieved by compliance with this standard should be equal to the level of protection achieved by compliance with GB 3836.1 and any of the types of protection listed therein.
Note 2: Anti-explosion inspection shall be carried out to electric apparatus which complies with this part by inspection organization approved by the national quality supervision department.
1 Scope
2 Normative References
3 Terms and Definitions
4 General
5 Construction
6 Connection Facilities and Wiring
7 Clearances, Creepage Distances and Separations
8 Electric Strength
9 Supplementary Requirements for Non-sparking Rotating Machines
10 Supplementary Requirements for Non-sparking Fuses and Fuse Assemblies
11 Supplementary Requirements for Non-sparking Luminaires
12 Supplementary Requirements for Non-sparking Instruments and Low Power Apparatus
13 Supplementary Requirements for Non-sparking Current Transformers
14 Supplementary Requirements for Non-sparking Plugs and Sockets
15 Supplementary Requirements for Non-sparking Cells and Batteries
16 Other Electrical Apparatus
17 General Supplementary Requirements for Apparatus Producing Arcs, Sparks or Hot Surfaces
18 Supplementary Requirements for Enclosed-break Devices and Non-incendive Components Producing Arcs, Sparks or Hot Surfaces
19 Supplementary Requirements for Hermetically Sealed Devices Producing Arcs, Sparks or Hot Surfaces
20 Supplementary Requirements for Sealed Devices or Encapsulated Devices Producing Arcs, Sparks or Hot Surfaces
21 Supplementary Requirements for Energy-limited Apparatus and Circuits Producing Arcs, Sparks or Hot Surfaces
22 Supplementary Requirements for Restricted-breathing Enclosures Protecting Apparatus Producing Arcs, Sparks or Hot Surfaces
23 Supplementary Requirements for N-pressurization Protecting Apparatus Producing Arcs, Sparks or Hot Surfaces
24 General Information on Verification and Tests
25 Specification Documentation
26 Type Tests
27 Routine Verifications and Tests
28 Marking
29 Documentation
30 Manufacturer’s Responsibility
Annex A (Normative) Technical Differences between this Part and IEC 60079-15:2001 and the Cause
