jQuery Mobile Framework
Search Home >> Standards Wordwide >> Australia Standards(AS) >> AS 1076.1-1977 code of practice for the selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - basic requirements

AS 1076.1-1977 code of practice for the selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - basic requirements

Standard Number:  AS 1076.1-1977
Title:  code of practice for the selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - basic requirements
Language:  English
Replacing Standard:  Doc 1738 (1971) (in part)

Status:  Obsolescen
Publisher:  Australia Standards(AS)
Price:  
Number of Pages:88P.;A4  

Preface:   
Description:Provides basic information on the selection of electrical apparatus, and its installation, alteration and maintenance to ensure safe use in areas where combustible materials are generated, prepared, processed, handled, stored or otherwise used, and which  
Catalog:Document Contents
AS 1076, Part 1-1977 SELECTION, INSTALLATION AND MAINTENANCE OF ELECTRICAL APPARATUS AND ...
PREFACE
CONTENTS
FOREWORD
SECTION 1. GENERAL PRINCIPLES
1.1 SCOPE OF PART
1.2 APPLICATION
1.3 DEFINITIONS
1.3.1 Combustible material
1.3.2 Explosive gas/air mixture
1.3.3 Explosive dust/air mixture
1.3.4 Hazard
1.3.5 Hazardous area
1.3.6 Non-hazardous area
1.3.7 Source of release
1.3.8 Flashpoint
1.3.9 Ignition temperature
1.3.10 Maximum surface temperature
1.3.11 Temperature class
1.3.12 Grouping of apparatus in Class I areas
1.3.13 Chemical compatibility
1.3.14 Glow temperature (of dusts)
1.3.15 Type of protection
1.3.16 Unprotected surface
1.3.17 Degrees of protection of enclosures
1.3.18 Portable apparatus
1.3.19 Transportable apparatus
1.3.20 Combustible gas
1.3.21 Combustible vapour
1.3.22 Combustible mist
1.3.23 Intrinsic safety (Ex i)
1.3.24 Flameproof enclosure (Ex d)
1.3.25 Gas or vapour exclusion (Ex p)
1.3.25.1 Pressurized enclosure
1.3.25.2 Purged enclosure
1.3.26 Protection by ventilation (Ex v)
1.3.26.1 Gas or vapour dilution
1.3.26.2 Heat dissipation
1.3.27 Oil-immersed equipment (Ex o)-
1.3.28 Sand-filled enclosure (Ex q)-
1.3.29 Hermetically sealed equipment (Ex h)-
1.3.30 Protection by encapsulation (Ex c)-
1.3.31 Increased safety protection (Ex e)-
1.3.32 Non-speaking equipment (Ex n)-
1.3.33 Dust-excluding ignition-proof enclosure (DIP)-
1.3.34 Type of Protection ?s?: Special Protection-
1.4 STATUTORY REGULATION AND ELECTRICITY REGULATIONS
1.4.1 General.
1.4.2 Mining.
1.4.3 Industry Above Ground.
1.4.4 Other Regulatory Authorities.
1.5 CLASSIFICATION OF HAZARDOUS AREAS
1.5.1 Basis of Classification.
1.5.2 General Classes.
1.6 TOXIC RISKS
1.7 IGNITION SOURCES OTHER THAN THOSE ASSOCIATED WITH ELECTRICAL APPARATUS
1.8 CONSEQUENTIAL EFFECTS
1.9 PROTECTION AGAINST STATIC ELECTRICITY
1.10 PROTECTION AGAINST LIGHTNING
1.11 PROTECTION AGAINST ELECTROMAGNETIC RADIATION
1.12 LIGHT METALS AS CONSTRUCTIONAL MATERIALS
SECTION 2. PREVENTION OF EXPLOSION
2.1 SCOPE OF SECTION.
2.2 GENERAL CONSIDERATIONS.
2.2.1 Occurrence of Fire or Explosion.
2.2.2 Probability of Fire or Explosion.
2.2.3 Exchange of Information.
2.2.4 Assessment of the Type and Extent of the Explosion Risk.
2.2.5 Methods of Protection.
2.2.6 Segregation.
2.2.7 Total Enclosure of Combustible Material.
2.2.8 Conditions of Control.
2.2.9 Certification and Assessment of Apparatus and System.
2.3 CLASS I HAZARDOUS GASES AND VAPOURS.
2.3.1 Zones of Class I Areas.
2.3.2 Apparatus Grouping in Class I Areas.
2.3.3 Temperature Classification.
2.3.4 Selection of the Type of Protection According to the Zone of Risk.
2.3.5 Procedure for Selecting the Electrical Apparatus.
2.3.5.1 Information required.
2.3.5.2 Selection of type of protection.
2.3.5.3 Apparatus grouping.
2.3.5.4 Protection against environmental hazards.
2.3.5.5 Ambient temperature limitations.
2.4 CLASS II HAZARDOUS DUSTS, FIBRES AND FLYINGS.
2.4.1 Division of Class II Areas.
2.4.2 Selection of the Type of Protection in Class II Areas According to the Division of ...
2.4.3 Procedure for Selecting the Electrical Apparatus in Class II Areas.
2.4.3.1 Information required.
2.4.3.2 Selection of type of protection.
2.4.3.3 Protection against environmental hazards.
2.4.3.4 Ambient temperature limitation.
SECTION 3. GENERAL INSTALLATION REQUIREMENTS
3.1 SCOPE OF SECTION.
3.2 ACCESS FOR INSPECTION.
3.3 PLANS AND RECORDS.
3.4 ELECTRICAL RATINGS.
3.5 INSTALLATION OF APPARATUS.
3.6 INTEGRITY OF INSULATION.
3.7 EARTHING.
3.8 BONDING.
3.9 AUTOMATIC ELECTRICAL PROTECTION.
3.9.1 General.
3.9.2 Earth-fault Protection.
3.9.3 Installations Not Exceeding 650 V.
3.9.4 Location of Protection and Control Apparatus.
3.9.5 Unearthed Systems.
3.10 ISOLATION.
3.10.1 General.
3.10.2 Location of Means of Isolation.
3.11 EMERGENCY SUPPLIES.
3.12 WIRING SYSTEMS.
3.12.1 General Installation Requirements for Wiring Systems.
3.12.1.1 General.
3.12.1.2 Consideration of hazardous environment.
3.12.1.3 Types of wiring.
3.12.1.4 Electrical continuity of metallic enclosures, conduits, sheaths and armour.
3.12.1.5 Circuits traversing a hazardous area.
3.12.1.6 Contact with other equipment or pipework.
3.12.1.7 Location of wiring.
3.12.1.8 Flexible terminal connections to fixed apparatus.
3.12.1.9 Cables and conduits passing through floors.
3.12.1.10 Precautions with cableways.
3.12.1.11 Marking.
3.12.1.12 Overhead lines for power supply and telecommunication circuits.
3.12.1.13 Wiring entry.
3.12.1.14 Unused cable entries.
3.12.1.15 Interconnections.
3.12.1.16 Cable runs.
3.12.1.17 Glands and seals.
3.12.2 Factors Affecting Choice of Wiring System.
3.12.2.1 General.
3.12.2.2 Steel conduits.
3.12.2.3 Cables for underground installation.
3.12.2.4 Mineral-insulated metal-sheathed cables.
3.12.2.5 Plastics-insulated and armoured cables.
3.12.2.6 Telecommunication circuits.
3.12.3 Installation of Conduit Systems.
3.12.3.1 Type of conduit.
3.12.3.2 Elbows.
3.12.3.3 Conduit runs between hazardous and non-hazardous areas.
3.12.3.4 Surface-mounted conduit.
3.12.3.5 Joints in conduit.
3.12.3.6 Bends in conduit.
3.12.3.7 Additional requirements.
3.12.4 Installation of Cable Systems.
3.12.4.1 Conductor material.
3.12.4.2 Interruptions to cable runs.
3.12.4.3 Identification of cable trenches.
3.12.4.4 Cable runs between hazardous and non-hazardous areas.
3.12.4.5 Mechanical protection of cables.
3.12.4.6 Ambient temperature during installation.
3.12.4.7 Cable installation in open air.
3.12.4.8 Armoured cables.
3.12.4.9 Mineral-insulated metal-sheathed cables.
3.12.4.10 Aluminium-sheathed cables.
3.13 PORTABLE AND TRANSPORTABLE APPARATUS AND ITS CONNECTIONS.
3.13.1 Necessity for Certification.
3.13.2 Protection of Apparatus.
3.13.3 Safeguarding of Flameproof Plugs and Sockets.
3.14 FLEXIBLE CABLES AND CORDS.
3.14.1 Construction of Cables.
3.14.2 Ambient Temperature.
3.14.3 Clamping at Points of Entry to Apparatus and Plugs.
3.15 TESTS.
3.15.1 Installation Tests.
3.15.2 Periodical Electrical Tests.
SECTION 4. INSPECTION AND MAINTENANCE
4.1 SCOPE OF SECTION.
4.2 GENERAL CONSIDERATIONS.
4.3 STAFF.
4.4 INSPECTION AND TESTING IN HAZARDOUS AREAS.
4.4.1 Apparatus to be Rendered Dead.
4.4.2 Check on Accumulation of Gas, Vapour and Dust.
4.5 PRECAUTIONS CONCERNING THE USE OF IGNITING AGENCIES.
4.6 PERIODICAL MECHANICAL INSPECTION.
4.7 MAINTENANCE REQUIREMENTS.
4.7.1 General.
4.7.2 Maintenance of Flexible Cables and Cords.
4.7.2.1 Storage of out-of-used cables and cords.
4.7.2.2 Inspection before and during use.
4.7.3 Precautions Against Corrosion.
4.7.4 Cleanliness.
4.7.5 Precautions Against Excessive Temperature Rise.
4.7.5.1 Freedom from deposits of dust.
4.7.5.2 Correct servicing of lighting fittings.
4.7.6 Alterations to Apparatus.
4.8 WITHDRAWAL FROM SERVICE.
SECTION 5. PROPERTIES OF COMBUSTIBLE LIQUIDS, VAPOURS AND GASES
5.1 SCOPE OF SECTION.
5.2 MELTING POINT AND BOILING POINT.
5.3 VAPOUR DENSITY.
5.3.1 General.
5.3.2 Effects of Temperature Changes.
5.4 FLASHPOINT.
5.4.1 General.
5.4.2 Materials Having High Flashpoints.
5.4.3 Classification of Flashpoints.
5.5 EXPLOSIVE (FLAMMABLE) LIMITS.
5.6 EXPLOSIVE (FLAMMABILITY) RANGE.
5.7 EFFECT OF ENVIRONMENTS HAVING OTHER THAN NORMAL ATMOSPHERIC CONDITIONS.
5.8 IGNITION TEMPERATURE.
5.8.1 General.
5.8.2 Basis of Ignition Temperatures.
5.8.3 Use of Ignition Temperature.
5.9 TEMPERATURE CLASSIFICATION.
5.10 APPARATUS GROUPING.
5.11 GENERAL CONSIDERATIONS.
5.11.1 Relation Between Ignition Temperature and Maximum Surface Tempera-ture.
5.11.2 Mixtures of Compounds.
5.11.3 Mists.
5.11.4 Impurities.
SECTION 6. PROPERTIES OF COMBUSTIBLE DUSTS, FLYINGS AND FIBRES*
SECTION 7. MARKING OF APPARATUS
7.1 SCOPE OF SECTION.
7.2 MARKING REQUIREMENTS FOR APPARATUS.
7.3 IDENTIFICATION OF THE TYPE OF PROTECTION.
7.4 EXAMPLES OF MARKING OF APPARATUS.
7.4.1 General.
7.4.2 Flameproof Enclosure.
7.4.3 Increased Safety Apparatus.
7.4.4 Intrinsic Safety.
7.4.4.1 Self-contained intrinsically safe apparatus.
7.4.4.2 Intrinsically safe systems and associated safe-area apparatus.
7.4.5 Type of Protection ?n?.
7.4.6 Other Types of Protection.
7.5 GENERAL NOTES ON MARKING.
7.5.1 Significance of the ?Ex? Symbol.
7.5.2 Certificate Number.
7.5.3 Component Approval.
7.5.4 Marking for Multiple Types of Protection.
APPENDIX A DEGREES OF PROTECTION OF ENCLOSURES
A1 CLASSIFICATION CODE.
A2 ENCLOSURE MARKING.
A3 PROTECTION OF PERSONS AGAINST CONTACT WITH LIVE OR MOVING PARTS INSIDE THE ENCLOSURE A...
A4 PROTECTION OF EQUIPMENT AGAINST INGRESS OF LIQUID.
A5 PROTECTION OF EQUIPMENT AGAINST MECHANICAL DAMAGE.
A6 DEGREES OF PROTECTION.
A7 PARTICULAR REQUIREMENTS FOR ROTATING ELECTRICAL MACHINES.
APPENDIX B FRICTIONAL SPARKING RISKS WITH LIGHT METALS AND THEIR ALLOYS
APPENDIX C CALCULATION OF THE FLAMMABILITY LIMITS FOR A MIXTURE OF GASES
C1 LIMITS FOR SIMPLE MIXTURES.
C2 LIMITS FOR COMPLEX INDUSTRIAL GAS MIXTURES.
APPENDIX D CERTIFICATION STANDARDS AND RELEVANT SPECIFICATIONS AND CODES OF PRACTICE
D1 DEVELOPMENTS IN INTERNATIONAL STANDARDS.
D2 AUSTRALIAN STANDARDS BASED ON IEC PUBLICATIONS.
D3 NATIONAL CERTIFYING BODY FOR ELECTRICAL APPARATUS FOR USE IN HAZARDOUS AREAS.
D4 RELEVANT CODES OF PRACTICE AND RULES.
D5 OTHER RELEVANT AUSTRALIAN STANDARDS.
APPENDIX E LIST OF ORGANISATIONS AND REGULATIONS
E1 AUSTRALIAN ELECTRICITY AUTHORITIES.
E2 AUSTRALIAN STATE MINING AUTHORITIES.
E3 REGULATIONS.
E3.1 Mining Regulations.
E3.2 Other Regulations.
  
File Format:  PDF(Acrobat Reader) or Word version doc Document
File Size:  798KB
Tile in English:  code of practice for the selection, installation and maintenance of electrical apparatus and associated equipment for use in explosive atmospheres other than mining applications - basic requirements

Full Text Information

Related

Top 10

New 10

PC Version