HB 13-1992

1 - SAA HB13-1992 ELECTRICAL EQUIPMENT FOR HAZARDOUS AREAS
4 - PREFACE
5 - CONTENTS
7 - CHAPTER 1 WHAT IS A HAZARDOUS AREA?
7 - 1.1 INTRODUCTION
7 - 1.2 HAZARDOUS AREAS
7 - 1.3 CONDITIONS FOR AN EXPLOSION
7 - 1.4 FLAMMABLE MATERIALS
8 - 1.5 PROPERTIES OF FLAMMABLE MATERIALS
8 - 1.5.1 General
8 - 1.5.2 Gases, vapours and mists
10 - 1.5.3 Summary
10 - 1.5.4 Dusts
11 - 1.6 IGNITION SOURCES
11 - 1.7 TOXICITY
12 - CHAPTER 2 WHO IS RESPONSIBLE?
12 - 2.1 INTRODUCTION
12 - 2.2 UNDERGROUND COAL MINING
12 - 2.3 OTHER INDUSTRIES
14 - CHAPTER 3 THE IMPORTANCE OF STANDARDS
14 - 3.1 INTRODUCTION
14 - 3.2 AUSTRALIAN STANDARDS
14 - 3.2.1 Standards Australia
14 - 3.2.2 How Australian Standards are used
14 - 3.3 INTERNATIONAL STANDARDS
15 - 3.4 OTHER NATIONAL STANDARDS
15 - 3.4.1 British Standards
15 - 3.4.2 European Standards
15 - 3.4.3 USA Standards
15 - 3.4.4 Canadian Standards
15 - 3.4.5 Japan
16 - CHAPTER 4 CLASSIFICATION OF HAZARDOUS AREAS
16 - 4.1 INTRODUCTION
16 - 4.2 RESPONSIBILITY
16 - 4.3 RELEVANT INFORMATION
16 - 4.3.1 Gases
16 - 4.3.2 Dusts
16 - 4.4 TYPE OF HAZARD
16 - 4.5 CLASS I-GASES 4.5.1 Probabilityofagashazard
16 - 4.5.1 Probability of a gas hazard
17 - 4.5.2 Zones
17 - 4.5.3 Group designation
17 - 4.5.4 Maximum surface temperature
18 - 4.6 CLASS II-DUSTS
18 - 4.6.1 General
18 - 4.6.2 Area classification
19 - 4.6.3 Ignition sensitivity and explosion severity
19 - 4.6.4 Hazard reduction
20 - CHAPTER 5 EXPLOSION-PROTECTION TECHNIQUES
20 - 5.1 INTRODUCTION
20 - 5.2 EXPLOSION-PROTECTION TECHNIQUES
21 - 5.3 Ex d-FLAMEPROOF ENCLOSURE
21 - 5.3.1 General
22 - 5.3.2 Groups
22 - 5.3.3 Subgroups
22 - 5.3.4 Major tests
26 - 5.4 Ex e-INCREASED SAFETY EQUIPMENT
26 - 5.4.1 General
26 - 5.4.2 Groups
26 - 5.4.3 Major tests
27 - 5.5 Ex i-INTRINSIC SAFETY 5.5.1 General
27 - 5.5.1 General
28 - 5.5.2 Groups
28 - 5.5.3 Categories
28 - 5.5.4 Intrinsically safe electrical equipment and systems
29 - 5.5.5 Safety barriers
29 - 5.5.6 Testing/assessment
31 - 5.6 Ex m-ENCAPSULATION
31 - 5.6.1 General
31 - 5.6.2 Groups
31 - 5.6.3 Requirements
31 - 5.7 Ex n-NON-SPARKING
32 - 5.8 Ex o-OIL IMMERSION
32 - 5.9 Ex p-PRESSURIZED ENCLOSURE
33 - 5.10 Ex pl-PURGING
34 - 5.11 Ex q-SAND-FILLED
35 - 5.12 Ex s-SPECIAL PROTECTION
35 - 5.13 Ex v-VENTILATION
35 - 5.14 Ex h-HERMETIC SEALING
35 - 5.15 DIP-DUST-EXCLUDING IGNITION-PROOF
35 - 5.15.1 General
35 - 5.15.2 Major tests
36 - 5.16 MIXED TECHNIQUES
38 - CHAPTER 6 OTHER STANDARD REQUIREMENTS
38 - 6.1 INTRODUCTION
38 - 6.2 AS 2380.1-GENERAL REQUIREMENTS
38 - 6.2.1 General
38 - 6.2.2 Light alloy enclosures
39 - 6.2.3 Marking of explosion-protected equipment
40 - 6.3 DEGREES OF PROTECTION (IP CODE)
41 - 6.4 CABLE GLANDS
41 - 6.4.1 General
42 - 6.4.2 Main features of a gland
42 - 6.4.3 Major tests
42 - 6.5 ELECTRICALLY HEATED OVENS
42 - 6.6 BATTERY OPERATED VEHICLES
43 - 6.7 ELECTRICAL SYSTEMS OF DISPENSING EQUIPMENT
43 - 6.8 ELECTROSTATIC PAINT AND POWDER SPRAY GUNS
43 - 6.9 GAS DETECTION INSTRUMENTS
43 - 6.10 UNDERGROUND COAL MINING
44 - CHAPTER 7 CERTIFICATION AND APPROVAL OF EQUIPMENT
44 - 7.1 INTRODUCTION
44 - 7.2 STANDARDS AUSTRALIA CERTIFICATION SCHEME
44 - 7.2.1 Background
44 - 7.2.2 Committee P/3
44 - 7.2.3 Certification Standards
45 - 7.2.4 Certificates of Compliance
45 - 7.2.5 Information on certificates
45 - 7.2.6 Statements of opinion
45 - 7.2.7 Application procedure
46 - 7.2.8 Testing Stations
47 - 7.2.9 List of SA certified equipment
47 - 7.3 APPROVED MINING EQUIPMENT
47 - 7.3.1 General
47 - 7.3.2 NSW Approval
47 - 7.3.3 Queensland approval
47 - 7.4 OVERSEAS TESTING AND CERTIFICATION
48 - 7.5 EXEMPTION FROM CERTIFICATION
49 - CHAPTER 8 SELECTION OF EQUIPMENT
49 - 8.1 EQUIPMENT FOR CLASS I (GASES)
49 - 8.1.1 General
49 - 8.1.2 Explosion-protection techniques
50 - 8.1.3 Group requirements
50 - 8.1.4 Temperature considerations
51 - 8.2 EQUIPMENT FOR CLASS II (DUSTS)
51 - 8.2.1 General
51 - 8.2.2 Explosion-protection techniques
52 - 8.2.3 Temperature classification
52 - 8.3 EQUIPMENT ABOVE A HAZARDOUS AREA
53 - 8.4 EQUIPMENT NOT PERMITTED
54 - CHAPTER 9 INSTALLATION
54 - 9.1 INTRODUCTION
54 - 9.2 COMPONENTS OF AN INSTALLATION
56 - 9.3 INSTALLATIONS IN ZONE 0 AREAS
56 - 9.4 INSTALLATIONS IN ZONE 1 AND ZONE 2 AREAS
56 - 9.5 INTRINSICALLY SAFE ELECTRICAL EQUIPMENT AND SYSTEMS
57 - 9.6 INSTALLATIONS IN CLASS II AREAS
57 - 9.7 SPECIFIC OCCUPANCIES
59 - CHAPTER 10 MAINTENANCE
59 - 10.1 INTRODUCTION
59 - 10.2 RELEVANT STANDARDS
59 - 10.3 IMPORTANT MAINTENANCE ASPECTS
59 - 10.3.1 General
60 - 10.3.2 Stopping plugs and bolts
60 - 10.3.3 Damage
60 - 10.3.4 Guards
60 - 10.3.5 Cable glands
60 - 10.3.6 Stopper boxes
60 - 10.3.7 Seals and gaskets
60 - 10.3.8 Electrical protection
60 - 10.3.9 Electrical connections
60 - 10.3.10 Earthing
60 - 10.3.11 Corrosion
61 - 10.4 OVERHAUL
62 - APPENDIX A - GOVERNMENT DEPARTMENTS
64 - APPENDIX B - AUSTRALIAN STANDARDS
64 - B1 EXPLOSION-PROTECTION STANDARDS
64 - B2 COAL MINING STANDARDS
65 - B3 OTHER RELEVANT STANDARDS
66 - APPENDIX C - OVERSEAS STANDARDS
68 - APPENDIX D - TEST STATIONS, CERTIFYING AUTHORITIES AND STANDARDS BODIES
70 - APPENDIX E - REQUIREMENTS IN NEW ZEALAND
70 - E1 INTRODUCTION
70 - E2 CLASSIFICATION OF HAZARDOUS AREAS
70 - E2.1 Responsibility
70 - E2.2 Applicable Standards
70 - E2.3 Other documents
71 - E3 INSTALLATION
71 - E3.1 Electrical Wiring Regulations
71 - E3.2 Explosion-protection techniques
71 - E3.3 Installation requirements
71 - E4 OVERHAUL
71 - E5 ADDITIONAL STANDARD REQUIREMENTS
71 - E5.1 Flammable liquid dispensing equipment
71 - E5.2 CNG compressor and refuelling stations
71 - E6 APPROPRIATE AGENCIES
72 - E7 NEW ZEALAND STANDARDS

Provides a basis for understanding the principles involved in the identification of a hazardous area, relevant statutory requirements, and the selection, installation and maintenance of appropriate electrical equipment. This publication also provides a basic introduction to the many Australian Standards dealing with hazardous areas. In addition the requirements that exist in New Zealand are covered in an appendix. Identical with NEEITC 181-1:1991.

First published as HB13-1988.
Second edition 1992.