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AS 1076.13-1977 code of practice for selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - installation and maintenance requirements for

Standard Number:  AS 1076.13-1977
Title:  code of practice for selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - installation and maintenance requirements for
Language:  English
Replacing Standard:  Doc 1738 (1971) (in part)

Revocatory Date:  2000/10/23
Status:  Withdrawn
Publisher:  Australia Standards(AS)
Price:  
Number of Pages:36  

Preface:   
Description:Provides recommendations for the selection, installation and use of instruments and instrument systems utilizing electrical energy in hazardous areas or in the proximity of flammable substances. It deals exclusively with protection against hazards arising from explosive mixtures caused by release of flammable substances. It does not deal with hazards arising from dust flyings and fibres, increased hazards arising from oxygen-enriched atmospheres, or highly specialized hazards such as those arising from radio-induced sparks.  
Catalog:Document Contents
AS 1076.13-1977 SELECTION, INSTALLATION AND MAINTENANCE OF ELECTRICAL APPARATUS AND ASSOC...
PREFACE
CONTENTS
FOREWORD
CODE
1 SCOPE
2 DEFINITIONS
2.1 Analyzer
2.2 Area classification
2.3 Electrical apparatus
2.4 Enclosure
2.5 Enclosure group
2.6 Explosive gas/air mixture
2.7 Fallible component
2.8 Flammable
2.9 Flammable substance
2.10 Flexible member
2.11 Grouping of gases and vapours
2.12 Ignition temperature
2.13 Instrument
2.14 Instrument system
2.15 Means of ignition
2.16 Protective gas
2.17 Purge
2.18 Source of release
2.19 Temperature class
2.20 Type of protection
3 PREVENTION OF EXPLOSION
3.1 Explosion Probability
3.2 Achieving Low Explosion Probability
4 AREA CLASSIFICATION, TEMPERATURE CLASS AND GROUPING OF GASES AND VAPOURS
4.1 General
4.2 Area Classifications
4.3 Considerations Affecting Classification and Extent of Hazardous Areas
4.3.1 General
4.3.2 Characteristics of flammable substance
4.3.3 Grade of source of release
4.3.4 Quantity and method of release
4.3.5 Type of ventilation
4.3.6 Climatic conditions
4.4 Temperature Class
4.5 Grouping of Gases/Enclosure Group
5 INSTRUMENT ENCLOSURES, PROTECTION AND LOCATION
5.1 Enclosures
5.2 Explosion Hazards Inside Enclosures
5.3 Protection
5.4 Single Enclosure
5.5 Nested Enclosures
5.6 Locations
6 PROTECTION FOR ELECTRICAL INSTRUMENTS NOT CONTAINING A SOURCE OF RELEASE.
6.1 Type of Protection
6.1.1 General
6.1.2 Special protection (Ex s)
6.1.3 Intrinsic safety (Ex ia and Ex ib)
6.1.4 Flameproof enclosure (Ex d)
6.1.5 Pressurized enclosure (Ex p)
6.1.6 Increased safety (Ex e)
6.1.7 Encapsulation
6.1.8 Hermetic sealing (Ex h)
6.1.9 Type ?n? protection (Ex n)
6.1.10 Restricted breathing (Ex n)
6.2 Unprotected Electrical Apparatus
7 ENCLOSED SOURCE OF RELEASE
7.1 General
7.2 Type and Extent of Internal Release
7.3 Combination of Types of Release
7.3.1 Relevant combinations
7.3.2 Condition 1 (No normal release, restricted abnormal release)
7.3.3 Condition 2 (No normal release, unrestricted abnormal release)
7.3.4 Condition 3 (Limited normal release, restricted abnormal release)
7.3.5 Condition 4 (Limited normal release, unrestricted abnormal release)
7.3.6 Condition 5 (Unlimited release)
7.4 Effect on Area Classification
8 PROTECTION FOR ELECTRICAL INSTRUMENTS CONTAINING A SOURCE OF RELEASE.
8.1 Types of Enclosure
8.2 Flameproof Enclosure
8.3 Pressurized and Continuously Diluted Enclosures
8.4 Other Enclosures
9 SELECTION OF A TYPE OF PROTECTION
9.1 General
9.2 Use of Table 1
9.3 Use of Table 2
9.4 Examples
9.4.1 Example 1
9.4.2 Example 2
9.4.3 Example 3
9.4.4 Example 4
10 INSTALLATION
10.1 General
10.2 Permanent Wiring
10.2.1 Type of cable
10.2.2 Avoidance of damage
10.2.3 Avoidance of the transmission of flammable substances
10.2.4 Cable glands, terminal boxes and junction boxes
10.2.5 Earthing
10.3 Circuit Protection.
10.4 Installation of Intrinsically Safe Instrument Systems
11 INSPECTION, TESTING AND MAINTENANCE
11.1 General
11.2 Isolation
11.3 Insulation Testing
11.4 Testing of Intrinsically Safe Instrument Systems
11.4.1 Functional testing
11.4.2 Validity testing
11.5 Alterations
APPENDIX A - LIST OF RELATED PUBLICATIONS
  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  917KB
Tile in English:  code of practice for selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - installation and maintenance requirements for

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