AS 1076.3-1977

1 - AS 1076, PART 3-1977 SELECTION, INSTALLATION AND MAINTENANCE OF ELECTRICAL APPARATUS AND ASSOCIATED EQUIPMENT FOR USE .....
4 - PREFACE
6 - CONTENTS
7 - FOREWORD
9 - SECTION 1. SCOPE AND GENERAL
9 - 1.1 SCOPE
9 - 1.2 DEFINITIONS
9 - 1.2.1 Type of Protection ‘d’: Flameproof Enclosure
9 - 1.2.2 Gap (diametrical clearance)
9 - 1.2.3 Gap (maximum experimental safe)
9 - 1.2.4 Joint
9 - 1.2.5 Length of flame path (width of joint)
9 - 1.2.6 Maximum surface temperature
9 - 1.2.7 Temperature class
10 - 1.3 DESCRIPTION OF TECHNIQUE
10 - 1.3.1 General.
10 - 1.3.2 Enclosures.
10 - 1.4 RELEVANT SPECIFICATIONS
10 - 1.5 PERMISSIBLE ZONES OF USE
10 - 1.5.1 Area of Use.
10 - 1.5.2 Area Restrictions.
10 - 1.6 CERTIFICATION AND ASSESSMENT OF APPARATUS AND SYSTEMS
11 - SECTION 2. SELECTION OF APPARATUS
11 - 2.1 GENERAL
11 - 2.2 TEMPERATURE CLASSIFICATION
11 - 2.3 CONDITIONS OF USE
11 - 2.4 APPARATUS GROUPING
11 - 2.4.1 General
11 - 2.4.2 Allocated Compounds
12 - 2.4.3 Compounds Not Allocated
13 - SECTION 3. INSTALLATION RECOMMENDATIONS
13 - 3.1 GENERAL
13 - 3.2 INSTALLATION OF APPARATUS
13 - 3.3 SOLID OBSTRUCTION EFFECTS
13 - 3.3.1 Obstruction
13 - 3.3.2 Solid Obstacles
13 - 3.4 WEATHER PROTECTION
13 - 3.4.1 Gaskets
13 - 3.4.2 Sealing of Joints
13 - 3.4.3 Use of Greases
13 - 3.4.4 Painting of Joints
14 - 3.4.5 Use of Tape
14 - 3.5 WIRING SYSTEMS
14 - 3.5.1 General
14 - 3.5.2 Entry Tappings
14 - 3.5.3 Superseded Standards
15 - 3.6 CONDUIT SYSTEMS
15 - 3.6.1 Installation
15 - 3.6.2 Sealing Boxes
15 - 3.6.3 Devices for Cable Points
15 - 3.6.4 Screwed Conduit
15 - 3.6.5 Unions
15 - 3.6.6 Screwed Joints
15 - 3.6.7 Conduit Fittings
15 - 3.7 CABLE SYSTEMS
15 - 3.7.1 General
15 - 3.7.2 Construction of Cables
16 - 3.8 TERMINATIONS
16 - 3.8.1 Thermoplastic or Elastomeric Insulated Cables
16 - 3.8.2 Additional Protection
16 - 3.8.3 Mineral-insulated Metal-sheathed Cables
16 - 3.8.4 Flameproof Apparatus with Integral Cables
17 - SECTION 4. INSPECTION, MAINTENANCE AND TESTING
17 - 4.1 GENERAL
17 - 4.2 INITIAL AND PERIODIC INSPECTIONS
17 - 4.3 MAINTENANCE
17 - 4.3.1 General
17 - 4.3.2 Joint Surfaces of Enclosure
17 - 4.3.3 Paint on Joint Surfaces
18 - 4.3.4 Inspection of Enclosure
18 - 4.3.5 Clamping of Armoured Cables
18 - 4.3.6 Repair of Glasses
18 - 4.3.7 Encapsulating Materials

Provides recommendations on the selection, installation and maintenance in hazardous areas of electrical apparatus which is certified or assessed in accordance with the requirements of type of protection 'd' - Flameproof enclosure. It does not apply to the underground mining industry, although the code may be applicable to certain parts of surface mining industries. For the purpose of this code, explosion risks due to the presence of combustible gases and vapours only are considered.

This Part of the Code applies to the concept of ensuring electrical safety in hazardous areas by means of Type of Protection 'd': Flameproof Enclosure, and offers guidance on the selection, installation and maintenance of this type of electrical apparatus.The recommendations of the code do not apply to the underground mining industry, where other precautions are necessary, though it is recognized that the recommendations of the code may be applied to the surface installations of mines.For the purposes of this Part of the code, explosion risks due to the presence of combustible gases and vapours only are considered. Combustible dusts are therefore excluded except where otherwise noted (see also Part 10).