AS 2381.10-1995

1 - AS 2381.10-1995 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - SELECTION, INSTALLATION AND MAINTENANCE - EQUIPMENT IN COMB....
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
7 - 1.3 DEFINITIONS
7 - 1.3.1 Area, hazardous
7 - 1.3.2 Combustible dust
7 - 1.3.3 Compounded joint
7 - 1.3.4 Dust
7 - 1.3.5 Enclosure, dust-excluding ignition-proof (DIP enclosure)
7 - 1.3.6 Equipotential bonding
7 - 1.3.7 Fibre
7 - 1.3.8 Flyings
8 - 1.3.9 Inherently explosive dusts
8 - 1.3.10 Minimum cloud ignition energy
8 - 1.3.11 Temperature, cloud ignition
8 - 1.3.12 Temperature, layer ignition
8 - 1.3.13 Explosion venting
8 - 1.4 ELECTRICAL RATING
8 - 1.5 PROTECTION AGAINST STATIC
8 - 1.6 PROTECTION AGAINST LIGHTNING
8 - 1.7 OTHER CONSIDERATIONS
9 - SECTION 2 SELECTION OF EQUIPMENT
9 - 2.1 SCOPE OF SECTION
9 - 2.2 PERMITTED TYPES OF PROTECTION
9 - 2.2.1 General
9 - 2.2.2 Dust-excluding ignition-proof enclosures (DIP)
9 - 2.2.3 Encapsulated equipment (Ex m)
9 - 2.2.4 Intrinsically safe equipment (Ex i)
9 - 2.2.5 Pressurized rooms or enclosures (Exp)
10 - 2.3 TEMPERATURE CLASSIFICATION
10 - 2.3.1 General
10 - 2.3.2 Differential required
11 - 2.3.3 Example of temperature calculation
11 - 2.3.4 Ambient temperature consideration
11 - 2.4 PHYSICALCHARACTERISTICS
11 - 2.4.1 Enclosure shape
11 - 2.4.2 Exterior panels
11 - 2.4.3 Cleaning and housekeeping
11 - 2.5 HEATING EQUIPMENT
13 - SECTION 3 INSTALLATION
13 - 3.1 SCOPE OF SECTION
13 - 3.2 WIRING SYSTEMS
13 - 3.2.1 General
13 - 3.2.2 Intrinsically safe circuits
13 - 3.2.3 Sheathed cables
13 - 3.2.4 MIMS cable
13 - 3.2.5 Armoured cables
14 - 3.2.6 Use of conduit
14 - 3.2.7 Flexible connections
15 - 3.3 SUPPORTS FOR WIRING
15 - 3.3.1 General
15 - 3.3.2 Prevention of sagging
15 - 3.3.3 Supports
15 - 3.3.4 Distances between supports
15 - 3.4 DRAINAGE
15 - 3.5 THREADED CONNECTIONS
15 - 3.5.1 General
15 - 3.5.2 Thread form
16 - 3.5.3 Length of thread
16 - 3.5.4 Sealing of threaded joints
16 - 3.6 EARTHING
16 - 3.7 EQUIPOTENTIAL BONDING
16 - 3.8 SOCKET-OUTLETS
16 - 3.8.1 Permitted types
16 - 3.8.2 Automatic isolation
17 - 3.8.3 Mounting
17 - 3.8.4 Location
17 - 3.9 PROTECTION
17 - 3.9.1 General
17 - 3.9.2 Motors
17 - 3.10 ISOLATION
17 - 3.11 ABRASION PROTECTION
18 - SECTION 4 INSPECTION, TESTING AND MAINTENANCE
18 - 4.1 GENERAL
18 - 4.2 DOCUMENTATION
18 - 4.3 FORMS OF INSPECTION
18 - 4.4 ONSITE ELECTRICAL TESTING
18 - 4.4.1 General
18 - 4.4.2 Installation tests
19 - 4.4.3 Periodical tests
19 - 4.5 MAINTENANCE
20 - APPENDIX A - GENERAL CONSIDERATIONS
20 - A1 HOUSEKEEPING
20 - A2 EXCLUSION OF ELECTRICAL EQUIPMENT FROM CLASS II AREAS
20 - A3 VIBRATION
20 - A4 BUILDING DESIGN
21 - A5 HOT SURFACES
22 - APPENDIX B - INFORMATION REGARDING INSTALLATION
22 - B1 GENERAL
22 - B2 INFORMATION REQUIRED
23 - APPENDIX C - INSPECTION, TESTING AND MAINTENANCE
23 - C1 FORMS OF INSPECTION
23 - C2 INSPECTION CHECKS
23 - C2.1 Area classification
23 - C2.2 Modifications
23 - C2.3 Surface temperature class
23 - C2.4 Marking
24 - C2.5 Circuit loop number/identification
24 - C2.6 Lamps and fuses
25 - C2.7 Earthing and equipotential bonding
25 - C2.8 Electrical connections
25 - C2.9 Damage
25 - C2.10 Compliance with documentation
25 - C3 MAINTENANCE
25 - C3.1 General
25 - C3.2 Checklist
25 - C3.3 Removal of electrical equipment
25 - C3.4 Modification or repair
25 - C3.5 Inspection after maintenance
25 - C4 RECORDS

Sets out requirements for the selection, installation and maintenance of electrical equipment for use in areas where combustible dust may be present in quantities that are likely to produce a fire or explosion.

This Standard specifies requirements for the selection, installation and maintenance of electrical equipment for use in areas where combustible dust may be present in such quantities as are likely to produce a fire or explosion hazard. Such areas are hereinafter referred to as Class II areas.NOTE: AS 2430.2 deals with the classification of Class II areas.This Standard does not apply to-(a) areas where inherently explosive dusts are present;(b) underground workings of coal mines; and(c) areas which may be affected by oxygen enrichment.

First published as AS 2381.10-1989.
Second edition 1995.