AS/NZS 60079.0:2000

1 - AS/NZS 60079.0:2000 ELECTRICAL APPARATUS FOR EXPLOSIVE GAS ATMOSPHERES - GENERAL REQUIREMENTS
4 - PREFACE
5 - CONTENTS
7 - 1 Scope
8 - 2 Normative references
10 - 3 Definitions and symbols
10 - 3.1 electrical apparatus
10 - 3.2 potentially explosive atmosphere
10 - 3.3 explosive gas atmosphere
10 - 3.4 explosive test mixture
10 - 3.5 ignition temperature of an explosive gas atmosphere
10 - 3.6 service temperature
11 - 3.7 maximum service temperature
11 - 3.8 maximum surface temperature
11 - 3.9 enclosure
11 - 3.10 type of protection
11 - 3.11 degree of protection of enclosure (IP)
11 - 3.12 rated value
11 - 3.13 rating
11 - 3.14 cable entry
12 - 3.15 Ex cable entry
12 - 3.16 conduit entry
12 - 3.17 compression element
12 - 3.18 clamping device
12 - 3.19 sealing ring
12 - 3.20 terminal compartment
12 - 3.21 connection facilities
12 - 3.22 bushing
12 - 3.23 Ex component
12 - 3.24 symbol ‘X’
12 - 3.25 symbol ‘U’
13 - 3.26 certificate
13 - 4 Apparatus grouping and temperature classification
13 - 5 Temperatures
13 - 5.1 Maximum surface temperature
14 - 5.2 Ambient temperatures
14 - 5.3 Surface temperature and ignition temperature
15 - 6 Requirements for all electrical apparatus
15 - 7 Non-metallic enclosures and non-metallic parts of enclosures
15 - 7.1 General
16 - 7.2 Thermal endurance
16 - 7.3 Electrostatic charges on enclosures or parts of enclosures of plastic material
16 - 7.3.1 Electrical apparatus of Group I
16 - 7.3.2 Electrical apparatus of Group II
17 - 7.4 Threaded holes
17 - 8 Enclosures containing light metals
18 - 9 Fasteners
18 - 9.1 General
18 - 9.2 Special fasteners
18 - 9.3 Electrical apparatus – holes for special fasteners
19 - 10 Interlocking devices
20 - 11 Bushings
20 - 12 Materials used for cementing
20 - 13 Ex components
21 - 14 Connection facilities and terminal compartments
21 - 15 Connection facilities for earthing or bonding conductors
22 - 16 Cable and conduit entries
23 - 17 Supplementary requirements for rotating electrical machines
23 - 17.1 Ventilation openings for external fans
23 - 17.2 Construction and mounting of the ventilating systems
24 - 17.3 Clearances for the ventilating system
24 - 17.4 Materials for external fans and fanhoods
24 - 18 Supplementary requirements for switchgear
25 - 19 Supplementary requirements for fuses
25 - 20 Supplementary requirements for plugs and sockets
26 - 21 Supplementary requirements for luminaires
26 - 22 Supplementary requirements for caplights, caplamps and handlamps
26 - 22.1 Caplights for Group I
27 - 22.2 Caplamps for Group II and handlamps
27 - 23 Type verifications and tests
27 - 23.1 General
27 - 23.2 Verification of documents
27 - 23.3 Compliance of prototype or sample with documents
27 - 23.4 Type tests
27 - 23.4.1 General
27 - 23.4.2
28 - 23.4.3 Mechanical tests
29 - 23.4.4 Tests for the degree of protection IP by enclosures
29 - 23.4.5 Torque test for bushings
30 - 23.4.6 Thermal tests
31 - 23.4.7 Tests of non-metallic enclosures or of non-metallic parts of enclosures
34 - 23.4.8 Tests in explosive mixtures
34 - 24 Routine verifications and tests
34 - 25 Manufacturer's responsibility
34 - 26 Verifications and tests on modified or repaired electrical apparatus
35 - 27 Marking
39 - Annex A - Subdivision of gases and vapours according to their maximum experimental safe gaps and minimum ignition currents
47 - Annex B - Ex cable entries
47 - B.1 General
47 - B.2 Constructional requirements
49 - B.3 Type tests
52 - B.4 Marking
53 - Annex C - Table C.1 – Clauses with which Ex components shall comply
54 - Annex D - Example of rig for resistance to impact test

Specifies the general requirements for construction, testing and marking of electrical apparatus, Ex cable entries and Ex components, intended for use in potentially explosive atmospheres of gas, vapour and mist. This Standard does not specify requirements for safety, other than those directly related to the explosion risk. This Standard is identical with and has been reproduced from IEC 60079-0:1998.

This part of AS/NZS 60079 specifies the general requirements for construction, testing and marking of electrical apparatus, Ex cable entries and Ex components, intended for use in potentially explosive atmospheres of gas, vapour and mist.This standard does not specify requirements for safety, other than those directly related to the explosion risk.This standard is or will be supplemented or modified by the following parts of IEC 60079 concerning specific types of protection:IEC 60079-1, flameproof enclosures d; IEC 60079-2, pressurized enclosures p; IEC 60079-5, powder filling q; IEC 60079-6, oil immersion o; IEC 60079-7, increased safety e; IEC 60079-11, intrinsic safety i;IEC 60079-18, encapsulation m;IEC 60079-22, Caplights for mines susceptible to firedamp (under consideration).*This part of AS/NZS 60079 and the parts of IEC 60079 mentioned above are not applicable to the construction of electromedical apparatus, shot-firing exploders, test devices for exploders and for shot-firing circuits.NOTE 1 In addition to the types of protection listed above, IEC 60079-15 is applicable for use in a potentially explosive atmosphere.NOTE 2 Apparatus not conforming with this standard or the standards listed in this clause may be considered safe by a national or other authorised body for use in potentially explosive atmospheres. In such cases, the apparatus is identified with the symbol s.

First published as AS/NZS 60079.0:2000.