AS/NZS 1747:2003
(Incorporating Amendment No. 1)
AS/NZS 1747:2003
Australian/New Zealand Standard™
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Reeling, trailing and feeder cables used
for mining—Repair, testing and fitting of
accessories
AS/NZS 1747:2003
This Joint Australian/New Zealand Standard was prepared by Joint Technical
Committee EL-003, Electric Wires and Cables. It was approved on behalf of the
Council of Standards Australia on 10 April 2003 and on behalf of the Council of
Standards New Zealand on 22 April 2003.
This Standard was published on 16 June 2003.
The following are represented on Committee EL-003:
Australasian Railway Association
Australian Electrical and Electronic Manufacturers Association
Australian Industry Group
Canterbury Manufacturers Association, New Zealand
Department of Defence, Australia
Department of Mineral Resources, NSW
Electrical Contractors Association of New Zealand
Electrical Regulatory Authorities Council
Electricity Supply Association of Australia
Institution of Engineers, Australia
Ministry of Economic Development, (New Zealand)
National Electrical and Communications Association
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This Standard was issued in draft form for comment as DR 02288.
AS/NZS 1747:2003
Australian/New Zealand Standard™
Reeling, trailing and feeder cables used
for mining—Repair, testing and fitting of
accessories
This is a free 7 page sample. Access the full version online.
Originated as AS 1747—1975.
Previous edition 1993.
Jointly revised and designated as AS/NZS 1747:2003.
Reissued incorporating Amendment No.1 (August 2005).
COPYRIGHT
© Standards Australia/Standards New Zealand
All rights are reserved. No part of this work may be reproduced or copied in any form or by
any means, electronic or mechanical, including photocopying, without the written
permission of the publisher.
Jointly published by Standards Australia, GPO Box 476, Sydney, NSW 2001 and Standards
New Zealand, Private Bag 2439, Wellington 6020
ISBN 0 7337 5256 X
AS/NZS 1747:2003
2
PREFACE
This Standard was prepared by the Joint Standards Australia/Standards New Zealand
Committee EL-003, Electric Wires and Cables, to supersede AS 1747—1993, Reeling,
trailing and feeder cables used for mining—Repair and testing.
This Standard incorporates Amendment No. 1 (August 2005). The changes required by the
Amendment are indicated in the text by a marginal bar and amendment number against the
clause, note, table, figure or part thereof affected.
The objective of this Standard is to provide standard procedures for the repair and testing of
reeling, trailing and feeder cables used in mining applications, and to establish requirements
for the repair of cables which will ensure that the repaired cable is returned to a condition
as near as possible to the original design. It also sets out requirements for the fitting of
accessories to these cables.
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This Standard differs from the previous edition in the following significant ways:
(a)
It has been published as a Joint Australian/New Zealand Standard.
(b)
The Scope has been extended to metalliferous mines, open cut mines, quarries and
dredges and the fitting of accessories.
(c)
The Foreword has been deleted.
(d)
Procedures for exothermic welding and hard soldering have been included.
(e)
The procedure for the repair of metallic screens without ferrules has been modified.
(f)
The recommended vulcanizing conditions for insulation and sheath have been deleted.
(g)
Plug and tail inspection has been included for surface mining applications.
(h)
A summary of the pre-repair and post-repair tests to be carried out on both
underground and surface mining cables has been included.
(i)
Additional test voltages have been provided for XR-EP-90 insulated cables for the
High Voltage Proof Tests.
(j)
An additional Section has been included providing details about carrying out
temporary sheath repairs.
(k)
An informative Appendix has been included providing guidance on assessing the
condition of a cable.
(l)
The requirement to colour code repair tapes has been deleted and replaced with the
requirement to maintain a system of repair tape identification.
As new developments occur, these matters should be put before the Committee with the
view to revising the Standard to keep pace with technology.
The terms ‘normative’ and ‘informative’ have been used in this Standard to define the
application of the appendix to which they apply. A ‘normative’ appendix is an integral part
of a Standard, whereas an ‘informative’ appendix is only for information and guidance.
Statements expressed in mandatory terms in notes to tables and figures are deemed to be
requirements of this Standard.
3
AS/NZS 1747:2003
CONTENTS
Page
SECTION 1 SCOPE AND GENERAL
1.1 SCOPE ........................................................................................................................ 5
1.2 REFERENCED DOCUMENTS .................................................................................. 5
1.3 DEFINITIONS ............................................................................................................ 6
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SECTION 2 EVALUATION BEFORE REPAIR AND HISTORY RECORD
2.1 REQUIREMENTS....................................................................................................... 9
2.2 HISTORY RECORD ................................................................................................... 9
2.3 DETAILS OF CABLE TO BE RECORDED............................................................... 9
2.4 VISUAL EXAMINATION.......................................................................................... 9
2.5 PRE-REPAIR TESTS.................................................................................................. 9
2.6 PRACTICABILITY OF REPAIR ................................................................................ 9
SECTION 3 REPAIR PROCEDURES FOR CABLES
3.1 COMPATIBILITY OF CABLES TO BE JOINED .................................................... 10
3.2 USE OF CLEANING SOLVENTS............................................................................ 10
3.3 JOINING BY FERRULES ........................................................................................ 10
3.4 JOINING BY EXOTHERMIC WELDING ............................................................... 10
3.5 JOINING BY HARD SOLDERING .......................................................................... 10
3.6 JOINING PILOT CONDUCTORS (all types of cable).............................................. 10
3.7 JOINING POWER CONDUCTORS OF ALL REELING AND TRAILING
CABLES.................................................................................................................... 11
3.8 JOINING POWER CONDUCTORS OF FEEDER CABLES .................................... 16
3.9 JOINING EARTH CONDUCTORS (EXCLUDING EARTH SCREENS) ................ 16
3.10 REPLACEMENT OF INSULATION OR COVERING OVER CONDUCTORS...... 16
3.11 JOINING INDIVIDUAL METALLIC OR COMPOSITE EARTH SCREENS ......... 22
3.12 REPLACEMENT OF SEMICONDUCTIVE ELASTOMERS................................... 26
3.13 LAY-UP OF CORE ASSEMBLY ............................................................................. 26
3.14 REPAIR OF INNER SHEATH.................................................................................. 26
3.15 JOINING PLIABLE ARMOUR ................................................................................ 26
3.16 REPLACEMENT OF SHEATH (inner or outer sheath) ............................................ 28
3.17 VULCANIZING........................................................................................................ 30
SECTION 4 INSPECTION AND REPLACEMENT OF PLUGS AND OTHER CABLE
ACCESSORIES
4.1 PLUG INSPECTION................................................................................................. 31
4.2 PLUG AND TAIL INSPECTION (Surface mining applications) .............................. 31
4.3 PLUG FITTING ........................................................................................................ 32
4.4 COMPOUNDS .......................................................................................................... 33
4.5 FLAMEPROOFING .................................................................................................. 33
4.6 SUITABILITY FOR APPLICATIONS (Surface mining applications)...................... 33
SECTION 5 TESTING
5.1 GENERAL ................................................................................................................ 34
5.2 TEST EQUIPMENT.................................................................................................. 34
5.3 TESTS TO BE CARRIED OUT ................................................................................ 34
5.4 HIGH VOLTAGE FAULT LOCATION TEST ......................................................... 36
5.5 CONTINUITY AND PHASE ROTATION TESTS................................................... 37
AS/NZS 1747:2003
5.6
5.7
5.8
5.9
5.10
5.11
4
INSULATION RESISTANCE TEST ........................................................................ 37
HIGH VOLTAGE PROOF TEST.............................................................................. 38
SYMMETRICAL LOAD TEST ................................................................................ 38
PARTIAL BREAK TEST.......................................................................................... 39
TESTS FOR INTEGRITY OF OUTER SHEATH..................................................... 39
SHEATH HARDNESS.............................................................................................. 40
SECTION 6 IDENTIFICATION OF REPAIRS
6.1 METHOD OF MARKING......................................................................................... 41
6.2 INFORMATION TO BE MARKED.......................................................................... 41
SECTION 7 TEMPORARY SHEATH REPAIRS
7.1 GENERAL ................................................................................................................ 42
7.2 PERFORMANCE CRITERIA ................................................................................... 42
7.3 MARKING OF TEMPORARY REPAIRS ................................................................ 42
7.4 MONITORING OF TEMPORARY REPAIRS.......................................................... 42
APPENDICES
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A
B
C
D
E
F
G
H
I
J
MINIMUM COMPUTER DATA BASE CABLE HISTORY INFORMATION........ 43
REQUIREMENTS FOR FERRULES........................................................................ 44
REQUIREMENTS FOR SOLDER AND FLUX........................................................ 45
PROCEDURE FOR EXOTHERMIC WELDING ..................................................... 46
A PROCEDURE FOR HARD SOLDERING ............................................................ 48
REPAIR MATERIALS AND TAPES ....................................................................... 50
GUIDANCE ON ASSESSING CABLE CONDITION.............................................. 52
REQUIREMENTS FOR TEST EQUIPMENT .......................................................... 53
ROUTINE TESTS ON TEST EQUIPMENT............................................................. 55
COMBINED RESISTANCE OF EARTH CONDUCTORS
FOR TYPES 275 AND 280B CABLES..................................................................... 56
AS/NZS 1747:2003
5
STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
Australian/New Zealand Standard
Reeling, trailing and feeder cables used for mining—Repair, testing and
fitting of accessories
SECT ION
1
SCOPE
AND
GENERA L
1.1 SCOPE
This Standard sets out requirements for the repair and testing of reeling, trailing and feeder
cables used in underground coal mines, metalliferous mines, open cut mines, quarries and
dredges. It also sets out requirements for the fitting of accessories to these cables.
The Standard also details the inspection and replacement of plugs fitted to the cables and to
the test equipment used for testing cables.
NOTE: The Standard applies particularly to reeling and trailing cables complying with
AS/NZS 1802 and AS/NZS 2802, and to cables with similar constructions complying with
AS/NZS 1972, but is not restricted in application to such cables.
Where type or code numbers are referred to in the Standard for trailing cables, the numbers are as
specified in AS/NZS 1802 and AS/NZS 2802.
1.2 REFERENCED DOCUMENTS
The following documents are referred to in this Standard:
AS
1299
1300
Electrical equipment for coal mines—Flameproof restrained plugs and
receptacles
Electrical equipment for coal mines—Bolted flame-proof cable coupling
devices
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1683
Methods of test for elastomers
1683.15.2 Part 15.2: Durometer hardness
1834
1834.1
Material for soldering
Part 1: Solder alloys
2380
Electrical equipment for
techniques
Part 6: Increased safety
2380.6
explosive
atmospheres—Explosion-protection
AS/NZS
1125
Conductors in insulated electric cables and flexible cords
1660
1660.3
Test methods for electric cables, cords and conductors
Part 3: Electrical tests
1802
Electric cables—Reeling and trailing—For underground coal mining purposes
1972
Electric cables—Underground coal mines—Other than reeling and trailing
2802
Electric cables—Reeling and trailing—For mining and general use (other than
underground coal mining)
3800
Electrical equipment for explosive atmospheres—Overhaul and repair
COPYRIGHT
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AS/NZS 1747:2003 Reeling, trailing and feeder cables used for
mining - Repair, testing and fitting of accessories
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