AS 1299-1993

1 - AS 1299-1993 ELECTRICAL EQUIPMENT FOR COAL MINES - FLAMEPROOF RESTRAINED PLUGS AND RECEPTACLES
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 Cable reel receptacle, left hand
7 - 1.3.2 Cable reel receptacle, right hand
7 - 1.3.3 Auxiliary contact pin
7 - 1.3.4 Auxiliary contact socket
7 - 1.3.5 Plug
7 - 1.3.6 Receptacle
7 - 1.3.7 Trailing cable
7 - 1.4 SERVICE CONDITIONS
7 - 1.5 RATINGS, DIMENSIONS AND COLOUR CODING
7 - 1.5.1 Ratings and dimensions
8 - 1.5.2 Colour coding
8 - 1.6 MARKING
24 - SECTION 2 DESIGN AND CONSTRUCTION
24 - 2.1 FLAMEPROOF ENCLOSURE
24 - 2.2 CLEARANCE AND CREEPAGE
24 - 2.3 MATERIALS
24 - 2.4 FASTENERS
24 - 2.5 CABLE GLANDS
24 - 2.6 TERMINALS
24 - 2.6.1 General
24 - 2.6.2 Conductor insertion diameter
24 - 2.6.3 Conductor insertion depth
25 - 2.7 CONTACT SOCKETS AND PINS
25 - 2.7.1 Materials
25 - 2.7.2 Construction of sockets
25 - 2.7.3 Provision of contacts
25 - 2.8 EARTHING
25 - 2.8.1 General
25 - 2.8.2 Scraping earth contact
26 - 2.8.3 Terminals
26 - 2.8.4 Flexible earthing conductor
26 - 2.9 PHASE BARRIER
26 - 2.10 INSULATION
26 - 2.11 OPERATING AND RETAINING DEVICE
26 - 2.12 CABLE REEL RECEPTACLE
27 - SECTION 3 TESTING
27 - 3.1 CATEGORIES OF TESTS
27 - 3.2 ROUTINE TESTS
27 - 3.2.1 General
27 - 3.2.2 Compliance
27 - 3.2.3 Sample size
27 - 3.2.4 High voltage test
27 - 3.2.5 Contact pressure test
28 - 3.2.6 Scraping earth contact
28 - 3.2.7 Withdrawal mechanism test
28 - 3.3 TYPE TESTS
28 - 3.3.1 List and order of type tests
28 - 3.3.2 Cable gland (slip load) test
29 - 3.3.3 Phase barrier (slip load) test
29 - 3.3.4 Static pressure test
29 - 3.3.5 Flameproof test
30 - 3.3.6 High voltage test
30 - 3.3.7 Temperature-rise test
31 - 3.3.8 Contact integrity test
31 - 3.3.9 Short-circuit (through-fault) test
33 - APPENDIX A - INFORMATION TO BE PROVIDED WITH ENQUIRY AND ORDER

Specifies the dimensional, electrical, mechanical and test requirements for flameproof restrained plugs and receptacles for the coupling of two or more trailing cables and of trailing cables to equipment. Units rated at 660 V, 1.1 kV and 3.3 kV are included, with current ratings up to 425 A.

This Standard specifies the dimensional and test requirements for flameproof restrained plugs and receptacles, incorporating three power contacts, one pilot contact and possibly one or more auxiliary contact, a scraping earth contact and an earthed phase barrier, intended for use with restricted earth-fault systems in coal mines. Provision is also made for restrained coupling units which enable lengths of trailing cable to be coupled together.Restrained plugs and receptacles to this Standard are not intended to be coupled or uncoupled while the circuit is energized.The Standard prescribes the dimensions necessary to provide for the interconnection of restrained plugs and receptacles of different makes; it also deals with some electrical and mechanical requirements including the provision of earthed phase barriers for protection against interphase faults. It does not, however, purport to specify a fully detailed design.The Standard provides for plug and receptacle discrimination, i.e. an arrangement whereby plugs and receptacles of different rated voltages are physically prevented from engagement.NOTES:1 The term 'receptacle' as used in this Standard is synonymous with the term 'socket-outlet' in AS 3000. The term 'receptacle' has been chosen to avoid confusion with the individual sockets within the plug.2 Appendix A lists information which should be supplied by a user with any enquiry or order.3 A typical plug and receptacle assembly is shown in Figure 1.1 and a typical plug coupling unit is shown in Figure 1.2.

First published as AS 1299-1973.
Second edition 1981.
Third edition 1984.
Fourth edition 1989.
Fifth edition 1993.