AS 2380.1-1989

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1 - AS 2380.1-1989 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES-EXPLOSION-PROTECTION TECHNIQUES - GENERAL REQUIREMENTS
4 - PREFACE
5 - CONTENTS
7 - FOREWORD
8 - SECTION 1. SCOPE AND GENERAL
8 - 1.1 SCOPE.
8 - 1.2 APPLICATION.
8 - 1.3 REFERENCED DOCUMENTS.
8 - 1.4 DEFINITIONS.
8 - 1.4.1 Cable entry
8 - 1.4.2 Certifying authority
8 - 1.4.3 Clearance
8 - 1.4.4 Conduit entry
8 - 1.4.5 Creepage distance
8 - 1.4.6 Connection facilities
8 - 1.4.7 Degree of protection of enclosures
8 - 1.4.8 Electrical equipment
8 - 1.4.9 Electrical equipment for explosive gas atmospheres
9 - 1.4.10 Enclosure
9 - 1.4.11 Ex component
9 - 1.4.12 Explosion-protection
9 - 1.4.13 Explosive atmosphere
9 - 1.4.14 Area, hazardous
9 - 1.4.15 Ignition temperature
9 - 1.4.16 Maximum surface temperature
9 - 1.4.17 Temperature classification
9 - 1.4.18 Terminal compartment
9 - 1.4.19 Testing station
9 - 1.5 STANDARD ATMOSPHERIC CONDITIONS.
9 - 1.6 LOW ENERGY DEVICES.
9 - 1.7 GROUPING AND CLASSIFICATION OF ELECTRICAL EQUIPMENT.
9 - 1.7.1 Group designation.
9 - 1.7.2 Group II subdivision.
9 - 1.7.3 Particular explosive atmosphere.
9 - 1.8 TEMPERATURES.
9 - 1.8.1 Ambient temperature range.
9 - 1.8.2 Maximum surface temperature.
10 - 1.8.3 Unclassified Group II surface temperatures.
10 - 1.8.4 Ignition temperature safety margins.
10 - 1.9 MANUFACTURER'S RESPONSIBILITY
11 - SECTION 2. REQUIREMENTS FOR ALL ELECTRICAL EQUIPMENT
11 - 2.1 GENERAL.
11 - 2.1.1 Compliance with Standards.
11 - 2.1.2 Workmanship.
11 - 2.1.3 Manufacturers' documents.
11 - 2.1.4 Enclosed equipment.
11 - 2.2 ENCLOSURES OF NON-METALLIC MATERIAL.
11 - 2.2.1 General.
11 - 2.2.2 Threaded holes.
11 - 2.2.3 Ignition by discharges of static electricity.
11 - 2.3 METALLIC ENCLOSURES.
11 - 2.3.1 Group I equipment.
11 - 2.3.2 Group II equipment.
11 - 2.4 FASTENERS.
11 - 2.4.1 General.
11 - 2.4.2 Special fasteners.
12 - 2.5 INTERLOCKING DEVICES.
12 - 2.6 BUSHINGS AND TERMINAL STUDS.
12 - 2.7 MATERIALS USED FOR CEMENTING AND SEALING.
12 - 2.8 CONNECTIONS.
12 - 2.9 CONNECTION FACILITIES FOR EARTHING OR BONDING CONDUCTORS.
12 - 2.9.1 Earthing facility.
12 - 2.9.2 Earthing size-internal.
12 - 2.9.3 Bonding facilities.
12 - 2.9.4 Earthing facility exceptions.
12 - 2.9.5 Protection against corrosion.
12 - 2.10 CONNECTION FACILITIES AND TERMINAL COMPARTMENTS.
12 - 2.10.1 Connection of external circuit conductors.
12 - 2.10.2 Access openings.
12 - 2.10.3 Explosion-protection.
12 - 2.11 CABLE AND CONDUIT ENTRIES.
12 - 2.11.1 General.
12 - 2.11.2 Conduit entry.
12 - 2.11.3 Blanking of entries.
12 - 2.11.4 Cable selection label.
13 - SECTION 3. SUPPLEMENTARY REQUIREMENTS FOR CERTAIN ELECTRICAL EQUIPMENT
13 - 3.1 ROTATING ELECTRICAL MACHINES.
13 - 3.1.1 Ventilation openings for external fans.
13 - 3.1.2 Construction and mounting of ventilating systems.
13 - 3.1.3 Clearances for ventilating systems.
13 - 3.1.4 Plastics materials used for fans.
13 - 3.2 SWITCHGEAR.
13 - 3.2.1 Switchgear restrictions.
13 - 3.2.2 Isolators of Group I and Group II equipment.
13 - 3.2.3 Interlocks for covers.
13 - 3.2.4 Isolation of Group I switchgear.
13 - 3.2.5 Latching of Group I equipment.
13 - 3.2.6 Enclosures containing remotely controlled equipment.
13 - 3.3 ENCLOSURES CONTAINING FUSES.
13 - 3.4 PLUGS AND SOCKET-OUTLETS.
13 - 3.4.1 Interlocking.
13 - 3.4.2 Plugs.
14 - 3.5 LUMINAIRES.
14 - 3.5.1 Prohibited types.
14 - 3.5.2 Protection of source of light.
14 - 3.5.3 Marking of enclosure.
15 - SECTION 4. MARKING
15 - 4.1 GENERAL.
15 - 4.2 INFORMATION TO BE MARKED.
15 - 4.3 MIXED TYPES OF EXPLOSION-PROTECTION.
15 - 4.4 ORDER OF MARKING.
15 - 4.5 MARKING OF Ex COMPONENTS.
16 - 4.6 MARKING OF SMALL ELECTRICAL EQUIPMENT.
16 - 4.7 METHOD OF MARKING.
16 - 4.7.1 General.
16 - 4.7.2 Adhesive metallic labels.
16 - 4.7.3 Nameplates.
16 - 4.7.4 Other forms of labelling.
16 - 4.8 EXAMPLES OF MARKING.
17 - SECTION 5. VERIFICATION AND TEST
17 - 5.1 GENERAL AND APPLICATION.
17 - 5.1.1 Purpose.
17 - 5.1.2 Verification of documents and design.
17 - 5.1.3 Conduct of type tests.
17 - 5.1.4 Application of type tests.
17 - 5.2 IMPACT AND DROP TESTS.
17 - 5.2.1 Impact test.
17 - 5.2.2 Drop test.
17 - 5.2.3 Acceptance criteria.
17 - 5.3 DEGREE OF PROTECTION TEST.
17 - 5.4 TORQUE TESTS.
17 - 5.5 TEMPERATURE-RISE TEST.
17 - 5.6 THERMAL SHOCK TEST.
17 - 5.7 INSULATION RESISTANCE OF PLASTICS PARTS.
18 - SECTION 6. ROUTINE TESTS
18 - 6.1 GENERAL.
18 - 6.2 HIGH VOLTAGE TEST.
19 - APPENDIX A - IMPACT TEST
19 - A1 SCOPE.
19 - A2 TEST VALUES.
19 - A3 TEST APPARATUS.
19 - A4 TEST TEMPERATURE.
21 - A5 SAMPLES.
21 - A6 PROCEDURE.
21 - A7 REPORTING OF RESULTS.
22 - APPENDIX B - TEMPERATURE-RISE TEST
22 - B1 SCOPE.
22 - B2 TEST CONDITIONS.
22 - B2.1 Power supply.
22 - B2.2 Mounting.
22 - B3 MEASURING DEVICES.
22 - B4 PROCEDURE.
22 - B5 REPORTING OF RESULTS.
23 - APPENDIX C - INSULATION RESISTANCE TEST
23 - C1 SCOPE.
23 - C2 TEST CONDITIONS.
23 - C3 TEST VOLTAGE.
23 - C4 SAMPLE.
23 - C5 PRECONDITIONING.
23 - C6 TEST METHOD.
23 - C6.1 General.
23 - C6.2 Voltmeter-ammeter method.
24 - C6.3 Comparative method.
24 - C7 PROCEDURE.
24 - C8 REPORTING OF RESULTS.

Prescribes general requirements for the construction, marking and testing of electrical equipment intended for use in explosive atmospheres and is supplemented by other parts covering specific types of protection. This Standard is similar to IEC 79-0.

This Standard specifies general requirements for the construction of electrical equipment for explosive atmospheres and is supplemented or modified by the particular Standards for the specific types of explosion-protection. The requirements contained in this Standard are supplementary to the requirements for electrical equipment specified in AS 3000, SAA Wiring Rules, and the relevant Australian Standard Approval and Test Specifications called-up therein. This Standard covers safety of the equipment with regard to explosion hazards only.This Standard is intended for application by designers and manufacturers of explosion-protected electrical equipment. It is also intended for application by certifying authorities in assessing compliance on the basis of type tests. This Standard does not contain requirements for ensuring that, in production, the equipment continues to comply. However, it is the manufacturer's responsibility to make the routine verifications and tests necessary to ensure that production models continue to comply with the Standard and are not inferior to the prototype or sample submitted for testing. Likewise this Standard does not include requirements for ensuring that maintenance work is carried out to ensure that equipment, originally manufactured in accordance with this Standard, continues to comply with the Standard. It is the owner's responsibility to ensure that appropriate maintenance is undertaken on a regular basis.

First published as AS 2380.1-1980.
Second edition 1985.
Third edition 1989.
Reissued incorporating Amendment No. 1 (September 1998).