AS 2380.9-1991

1 - AS 2380.9-1991 ELECTRICAL EQUIPMENT FOR EXPLOSIVE ATMOSPHERES - EXPLOSION-PROTECTION TECHNIQUES - TYPE OF PROTECTION n - NON-
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
6 - 1.3 DEFINITIONS
6 - 1.3.1 Type of protection ‘n’
6 - 1.3.2 Normal operation
7 - 1.3.3 Restricted-breathing enclosure
7 - 1.3.4 Enclosed-break device
7 - 1.3.5 Non-incendive component
7 - 1.3.6 Hermetically-sealed device
7 - 1.3.7 Sealed device
7 - 1.3.8 Energy-limited equipment and circuits
7 - 1.3.9 Separation
7 - 1.4 GROUPING OF EQUIPMENT
7 - 1.5 MARKING
8 - SECTION 2 REQUIREMENTS FOR THE CONSTRUCTION OF ALL ELECTRICAL EQUIPMENT
8 - 2.1 SCOPE OF SECTION
8 - 2.2 POTENTIAL IGNITION SOURCES
8 - 2.3 ENCLOSURES
8 - 2.3.1 General
8 - 2.3.2 Degree of protection
8 - 2.4 CONNECTION FACILITIES
8 - 2.4.1 General
8 - 2.4.2 Connections for external conductors
9 - 2.4.3 Internal connections and wiring
9 - 2.5 CLEARANCES, SEPARATIONS AND CREEPAGE DISTANCES
9 - 2.6 WINDINGS
10 - SECTION 3 SUPPLEMENTARY REQUIREMENTS FOR NON-SPARKING EQUIPMENT
10 - 3.1 ROTATING MACHINES
10 - 3.1.1 Temperature class
10 - 3.1.2 Bars
10 - 3.1.3 Clearance for fans
10 - 3.1.4 Earth terminal
10 - 3.1.5 Degree of protection of terminal boxes
10 - 3.1.6 Operation with a non-sinusoidal supply
10 - 3.2 FUSES AND FUSE ASSEMBLIES
10 - 3.2.1 Fuse requirements
10 - 3.2.2 Fuse temperature
10 - 3.3 PLUGS AND SOCKET-OUTLETS AND SIMILAR CONNECTORS
10 - 3.3.1 Mechanical requirements for internal connections
10 - 3.3.2 Identification of internal connections
10 - 3.3.3 External connections
10 - 3.3.4 General purpose socket-outlets
11 - 3.4 LUMINAIRES DESIGNED FOR MAINS SUPPLY
11 - 3.4.1 Temperature class
11 - 3.4.2 Enclosure
11 - 3.4.3 Connections
11 - 3.4.4 Bayonet lampholder design
11 - 3.4.5 Screw lampholder design
11 - 3.4.6 Bi-pin lampholders for tubular fluorescent lamps
11 - 3.4.7 Compliance with other Standards
11 - 3.4.8 Starters for fluorescent lamps
11 - 3.4.9 Starter holders
11 - 3.5 INSTRUMENTS AND LOW POWER EQUIPMENT
12 - SECTION 4 SUPPLEMENTARY REQUIREMENTS FOR EQUIPMENT PRODUCING OPERATIONAL ARCS, SPARKS OR HOT SURFACES
12 - 4.1 GENERAL
12 - 4.2 ENCLOSED-BREAK DEVICES AND NON-INCENDIVE COMPONENTS
12 - 4.2.1 Rating
12 - 4.2.2 Construction
12 - 4.3 HERMETICALLY-SEALED DEVICES
12 - 4.4 SEALED DEVICES
12 - 4.4.1 Construction
12 - 4.4.2 Gasket seals
12 - 4.4.3 Poured seals
12 - 4.4.4 Damage to seals
12 - 4.5 ENERGY-LIMITED EQUIPMENT AND CIRCUITS
13 - 4.6 RESTRICTED-BREATHING ENCLOSURES
13 - 4.6.1 General
13 - 4.6.2 Constructional requirements
14 - SECTION 5 VERIFICATION AND TESTS
14 - 5.1 TYPE VERIFICATION AND TESTS
14 - 5.2 DIELECTRIC STRENGTH TEST
14 - 5.3 TESTS FOR ENCLOSED-BREAK DEVICES AND NON-INCENDIVE COMPONENTS
14 - 5.3.1 Preparation of sample prior to type test
14 - 5.3.2 Tests
14 - 5.4 TEST FOR SEALED DEVICES
15 - 5.5 TEST FOR ENERGY-LIMITED EQUIPMENT AND CIRCUITS
15 - 5.5.1 General
15 - 5.5.2 Maximum voltage and current levels
15 - 5.5.3 Spark-test apparatus
15 - 5.5.4 Procedure
15 - 5.6 TESTS FOR RESTRICTED-BREATHING ENCLOSURES
15 - 5.6.1 General
15 - 5.6.2 Diffusion half-time test
16 - 5.6.3 Pressure half-time test
16 - 5.6.4 Air flow test
16 - 5.7 GASKET AND SEAL TEST
17 - APPENDIX A - RESTRICTED-BREATHING ENCLOSURES
17 - A1 RESTRICTED-BREATHING CONCEPT
17 - A2 PRINCIPLES OF THE CONCEPT
17 - A3 EXPLANATION OF TERMS
17 - A4 THEORY AND TEST REQUIREMENTS
18 - A5 CALCULATION OF TEST PARAMETERS

Specifies design, construction and testing requirements for non-sparking electrical equipment for use in explosive atmospheres. Includes the requirements for enclosed-break devices and non-incendive components, sealed devices and restricted-breathing enclosures. Technically similar to IEC 79-15.

This Standard specifies requirements for the design, construction and testing of non-sparking type electrical equipment, intended for use in Class 1 Zone 2 hazardous areas.This Standard supplements AS 2380.1, except for the requirements of the following clauses which do not apply:2.1.4 Enclosed equipment2.2 Enclosures of non-metallic material2.3.2 Group II equipment2.9.3 Bonding facilities2.11.2 Conduit entry3.3 Enclosures containing fuses3.4 Plugs and socket-outlets5.2.2 Drop test5.6 Thermal shock test

First published as AS 2238-1979.
Second edition 1982.
Revised and redesignated AS 2380.9-1991.