As 3007.1 - Electrical Installations

5/28/2018 As 3007.1 - Electrical Installations

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AS 3007.11987

Australian Standard

Electrical installationsSurface mines and associatedprocessing plant

Part 1: Scope and definitions

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This Australian standard was prepared by Committee EL/33, Electrical Installations forOutdoor Sites Under Heavy Conditions (Including Opencast Mines and Quarries). It wasapproved on behalf of the Council of the Standards Association of Australia on27 February1987 and published on 4 May 1987.

The following interests are represented on Committee EL/33:

Association of Consulting Engineers Australia

Australian Electrical and Electronic Manufacturers Association

Australian Institute of Mining and Metallurgy

Confederation of Australian Industry

Department of Industrial Relations, N.S.W.

Department of Mines, Qld

Department of Mines, Tas.

Electricity Supply Association of Australia

Mining Interests

Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subject toperiodic review and are kept up to date by the issue of amendments or new editions as necessary. It is importanttherefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto.

Fulldetails of all Australian Standards and related publications will be found in the Standards Australia Catalogue

of Publications; this information is supplemented each month by the magazine The Australian Standard, whichsubscribing members receive, and which gives details of new publications, new editions and amendments, and ofwithdrawn Standards.

Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, arewelcomed. Notification of any inaccuracy or ambiguity found in an Australian Standard should be made withoutdelay in order that the matter may be investigated and appropriate action taken.

ThisStandard was issued in draft form for comment as DR 86009.AccessedbyHOMESTAKEGOLD

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AS 3007.11987

Australian Standard

Electrical installationsSurface mines and associatedprocessing plant

Part 1: Scope and definitions

First published 1982. . . . . . . . . . . . . . . . . . . . . . . . . . . . .Second edition 1987. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PUBLISHEDBY STANDARDS AUSTRALIA(STANDARDS ASSOCIATION OF AUSTRALIA)1 THE CRESCENT, HOMEBUSH, NSW 2140

ISBN0 7262 4613 1


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PREFACE

This standard was prepared by the Associations Committee on Electrical Installations forOutdoor Sites Under Heavy Conditions (Including Opencast Mines and Quarries) tosupersede AS 3007, Part 11982.

It is essentially identical with IEC 6211* which was prepared by the corresponding

IEC Technical Committee, i.e. TC 71. Where this standard deviates technically fromIEC 6211 by way of different or additional requirements, this is indicated by a rule in themarginagainst the clause, or part thereof, affected. A summary of such technical variations isgiven in the Annex.

TheAustralian Committee (EL/33) has actively participated in the work of IEC TC 71 whichhas as its objective the development of uniform and internationally acceptable rules for thesafeuse of electricity in opencast mines, quarries, stockpiles and the like. Such applicationspresent particularly onerous conditions for the electrical apparatus and systems, includingcontinualalteration of the location of the apparatus and systems, extension of the operationalarea,and adverse environmental conditions. Because of the size of the plant and the need formobility,supply is frequently at high voltage over long distances, by means of trailing cables.Thisshould be compared with other industries where the electrical installations are generallyfixed.

The AS 3007 series specifies requirements for the installation and operation of electrical

apparatus and systems in the abovementioned locations, with the object of ensuring thesafety of persons, livestock and property. AS 3007.1 (this standard) outlines the scope of thecompositestandard and provides definitions for some of the terms used. AS 3007.2 specifiesthe measures which are required for protection against electric shock in normal service fromdirect contact with live parts; for protection against electric shock from parts which maybecome live in the event of a fault(indirect contact); and for protection against the effects ofovercurrent resulting from overload or short circuit conditions. AS 3007.3 specifies generalrequirements for the equipment and ancillaries associated with the electrical installation.AS 3007.4 sets out the requirements which are specific to particular installations, togetherwith any exemptions from the general requirements of AS 3007.2 and AS 3007.3 whichapply for such installations. AS 3007.5 sets out the normal operating procedures whichshould be carried out to ensure the safety of personnel.

The AS 3007 series recognizes several types of power supply system and specifics theprotectivemeasures which are necessary for each system. Requirements for the protection ofpersonnel from indirect contact (see Section 2 of AS 3007.2) are based on the concept of

permissible voltage versus time limits, which take into account the pathophysiologicaleffects of electric current passing through the human body, the typical industry conditions,and the probability of persons being in contact with the plant. In this and other respects theAS 3007 series differs in approach from the practically evolved requirements ofAS 3000, SAA Wiring Rules.

Itwill therefore be necessary for the regulatory authorities concerned to clearly delineate therespective areas of application for the AS 3007 series and for AS 3000.

* A new edition in course of publication based on Document 71(Central Office)33.

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Careshould be taken to ensure that material used is from the current edition of the Standard and that it is updated whenever the Standard is amended orrevised. The number and date of the Standard should therefore be clearly identified.

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CONTENTS

Page

1 SCOPE AND REFERENCED DOCUMENTS 4. . . . . . . . . . . . . . . . . . . . . . . .

2 OBJECT 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3 DEFINITIONS 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

APPENDIX A. INDEX OF TERMS 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ANNEX. SUMMARY OF TECHNICAL DEVIATIONS BETWEEN

THIS STANDARD AND IEC 6211 9. . . . . . . . . . . . . . . . . . . . . . . . . . .


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AS 3007.11987 4

STANDARDS ASSOCIATION OF AUSTRALIA

Australian Standard

for

ELECTRICAL INSTALLATIONS SURFACE MINES AND ASSOCIATED PROCESSING PLANT

PART 1 SCOPE AND DEFINITIONS

1 SCOPE AND REFERENCED DOCUMENTS.

1.1 Scope. This standard (and other standards in theAS 3007 series) applies to the installation and operationof electrical apparatus and systems associated withoutdoor sites under heavy conditions, including open-castmines, quarries, stockpiles and the like. It applies

particularly to electrical apparatus and systems used forthe following:

(a) Winning, stacking and primary processingmachinery.

(b) Secondary processing machinery.

(c) Transport conveying systems.

(d) Pumping and water supply systems.

(e) Power generating and distribution equipment.

(f) Control, signal, supervisory and communicationsystems.

(g) Ancillaries.

The AS 3007 series does not cover temporary andprovisional places of work in the open, such as buildingsites and earth-moving sites, unless the equipment usedis similar to that used in surface mining applications.

1.2 Referenced documents. The following standardsare referred to in this standard:

AS 1852 (151) International Electrotechnical VocabularyChapter 151 - Electrical and MagneticDevices

AS 1852 (826) International Electrotechnical VocabularyChapter 826 - Electrical Installations ofBuildings

AS 3007.2 Electrical Installations - Surface Mines

and Associated Processing PlantPa rt 2 - Ge ne ral P rot ect ionRequirements

IEC 71-1 Insulation Co-ordinationPart 1: Terms, Definitions, Principlesand Rules

IEC 621-1 Electrical Installations For Outdoor SitesUnder Heavy Conditions (IncludingOpen-cast Mines and Quarries)Part 1: Scope and Definitions.

2 OBJECT. The object of the AS 3007 series is to setout guiding principles for the installation and operationof electrical equipment so as to ensure the safety of

persons, livestock and property, and the properfunctioning of the plant.

3 DEFINITIONS. For the purpose of the AS 3007series the definitions given in Clauses 3.1 to 3.65 apply.An alphabetical index of the defined terms is given inAppendix A.

Certain definitions have been taken from relevantchapters of AS 1852, International Electrotechnical

Vocabulary. Such definitions are identified by referenceto t he ap pl ic ab le IE V de si gn at io n, e .g .IEV XXX-XX-XX.

For the definitions of other terms reference should bemade to the appropriate chapter of AS 1852 and toAustralian or IEC standards dealing with the particularsubjects concerned.

In the following definitions the terms Safety andProtection are to be interpreted as follows:

(a) The term Safety is used in a broad sense coveringthe safety of persons, livestock and property. In thisrespect the safety of property also includes thosecases where safety depends on continuity of supply.

(b) The term Protection is also used in a broad sensecovering all measures and actions taken to protectagainst or prevent injury. It also includes allequipment used in connection with these measures -serving its purpose of assuring the safety of persons,livestock and electrical equipment.

3.1 Open-cut mine (open-cast mine)- an open-air sitefor the extraction of materials or minerals, such as coal,bauxite, iron ore, etc.

3.2 Quarry - an open-air site for the extraction ofmaterials such as limestone, gravel, clay, etc.

3.3 Electrical installation- an assembly of associatedelectrical equipment to fulfil a specific purpose orpurposes and having co-ordinated characteristics.

3.4 Electrical equipment - any item used for suchpurposes as generation, conversion, transmission,distribution or utilization of electrical energy, such asmachines, transformers, apparatus, measuringinstruments, protective devices, equipment for wiringsystems, appliances. (IEV 826-07-01)

3.5 Operating area (normal operating area) - anelectrical area with a high level of protection againstdirect contract which is accessible to operating personnelin the normal performance of their duties.

NOTE: The required degree of protection against direct contact isspecified in Section 1 of AS 3007.2.

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5 AS 3007.11987

3.6 Electrical operating area- an electrical area witha medium level of protection against direct contact whichis accessible only by the opening of a door or theremoval of a barrier and which is clearly and visiblymarked by appropriate signs.

NOTE: The required degree of protection against direct contact is

specified in Section 1 of AS 3007.2.3.7 Closed electrical operating area- an electrical areawith a low level of protection against direct contactwhich is accessible only through the use of a tool or keyand which is clearly and visibly marked by appropriatesigns.

NOTE: The required degree of protection against direct contact isspecified in Section 1 of AS 3007.2.

3.8 Ordinary persons - persons having inadequatetraining or experience to enable them to avoid dangerswhich electricity may create.

3.9 Instructed persons- persons adequately advised orsupervised by skilled persons to enable them to avoid

dangers which electricity may create.3.10 Skilled persons - persons with technicalknowledge or sufficient experience to enable them toavoid dangers which electricity may create.

3.11 Winning and stacking machinery - machinesused in the process of uncovering or detaching materialsfrom the earths surface or stacking such material. Thesemachines are designed to be able to change locationaccording to operational requirements.

They include the following:

(a) Excavators, namely, bucket-wheel excavators,bucket-chain excavators, draglines, shovels andother excavators, reclaimers, ditch bunker loaders,

etc.

(b) Spreaders and stackers.

(c) Mobile conveyor bridges.

(d) Mobile conveyors, including tripper carriages.

(e) Loading stations, including hoppers and surge bins

(f) Floating dredges.

(g) Mobile electric drills.

3.12 Transport conveying system - a movable orstationary mechanical item of plant designed for theconveying of materials continuously from one location toanother.

They include the following:

(a) Belt conveyors.

(b) Chain conveyors.

(c) Bucket conveyors.

(d) Paddle or scraper conveyors.

(e) Screw conveyors.

(f) Hydraulic or pneumatic conveyor systems.

3.13 Primary processing machinery- any machinerynecessary to prepare material extracted from the earthprior to its transport to subsequent processing orutilization areas.

3.14 Secondary processing machinery - any machinerynecessary to process, at a point remote from the open cutor quarry, material extracted from the earth.

3.15 Haulage truck- an electrically powered vehicle,usually operating on rubber tyres, used for the transportof materials and which may have a self-contained orexternal power supply.

3.16 Portable apparatus- an apparatus or assembly ofapparatus intended to be normally held in the hand

during use or which can be carried by a person.

3.17 Mobile apparatus- an apparatus or assembly ofapparatus which is too heavy to be portable but which iscapable of being moved without discontinuity of electricpower during use.

3.18 Movable apparatus- an apparatus or assembly ofapparatus which is too heavy to be portable, but whichis moved between periods of use, with its electric powersource disconnected.

3.19 Fixed apparatus - an apparatus or assembly ofapparatus which is installed in a determined place andwhich is not normally moved.

3.20 Self-contained power supply - an electricalinstallation in which the generation and utilization plantsare housed within the same structure.

3.21 External power supply- an electrical installationin which the generation and utilization plants are nothoused within the same structure.

3.22 TN system- a power system having the earthablepoint directly connected to earth and the exposedconductive parts of the installation being connected byprotective conductors to the earthable point of the powersystem.

NOTE: For further information see Section 2 of AS 3007.2.

3.23 TT system- a power system having the earthable

point directly connected to earth, the exposed conductiveparts of the installation being connected to earthelectrodes which are electrically independent of the earthelectrodes of the power system.


3.24 IT system- a power system having the earthablepoint not connected to earth, or connected to earththrough an impedance (resistor or reactor), the exposedconductive parts of the installation being connected toearth electrodes which may be the same as those usedfor the earthing resistor or reactor.


3.25 Live part - a conductor or conductive part

intended to be energized in normal use, including aneutral conductor.

NOTE: This term does not necessarily imply a risk of electric shock.

3.26 Exposed conductive part- a conductive part ofelectrical equipment, which can be touched and which isnot normally live, but which may become live underfault conditions.

NOTE: A conductive part of electrical equipment which can onlybecome live under fault conditionsthrough an extraneous conductivepart, is not considered to be an exposed conductive part.

3.27 Extraneous conductive part- a conductive partnot forming part of the electrical installation and liableto introduce a potential, generally the earth potential.

(IEV 826-03-03)3.28 Direct contact - contact of persons or livestockwith live parts. (IEV 826-03-05)

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AS 3007.11987 6

3.29 Indirect contact- contact of persons or livestockwith exposed conductive parts or extraneous conductiveparts which have become live under fault conditions.

3.30 Arms reach- a zone extending from any point ona surface where persons usually stand or move about, tothe limits which a person can reach with the hand in any

direction without assistance. (IEV 826-03-11)

3.31 Barrier (screen) - a part providing protectionagainst direct contact from any usual direction ofaccess. (IEV 826-03-13)

3.32 Enclosure - a part providing protection ofequipment against certain external influences and, in anydirection, protection against direct contact.

(IEV 826-03-12)

3.33 Obstacle- a part preventing unintentional directcontact, but not preventing direct contact by deliberateaction. (IEV 826-03-14)

3.34 Protective systems and devices - systems anddevices designed to prevent danger to persons orlivestock and damage to plant in the event of overcurrentdue to overload, fault current or earth fault current.

3.35 Fault current - a current resulting from aninsulation failure or the bridging of insulation.

3.36 Earth fault current- a current which flows fromphase conductors to earth, protective conductors, orprotective enclosures, etc., from the point of insulationbreakdown.

3.37 Leakage current (in an installation)- a currentwhich, in the absence of a fault, flows to earth or toextraneous conductive parts in a circuit.

NOTE: This current may have a capacitive component including thatresulting from the deliberate use of capacitors.

(IEV 826-03-08)

3.38 Residual current - the algebraic sum of theinstantaneous values of current flowing through all liveconductors of a circuit at a point of the electricalinstallation. (IEV 826-03-09)

3.39 Nominal voltage (of a three-phase system)- ther.m.s. phase-to-phase voltage by which the system isdesignated and to which certain operating characteristicsof the system are related.

3.40 Highest voltage (of a three-phase system)- thehighest r.m.s. phase-to-phasevoltage which occurs under

normal operating conditions at any time and at any pointof the system. It excludes voltage transients (such asthose due to system switching) and temporary voltagevariations due to abnormal conditions (such as those dueto fault conditions or the sudden disconnection of largeloads).

3.41 Touch voltage - voltage appearing during aninsulation fault, between simultaneously accessible parts.

NOTES:

1. By convention, this term is used only in connection withprotection against indirect contact.

2. In certain cases, the value of the touch may be appreciablyinfluenced by the impedance of the person in contact with theseparts. (IEV 826-02-02)

3.42 Prospective touch voltage - the highest touchvoltage liable to appear in the event of a fault ofnegligible impedance in the electrical installation.

(IEV 826-02-03)

3.43 Conventional touch voltage limit (symbol UL)-maximum value of the touch voltage which does notrepresent a hazard to personnel and which is permitted tobe maintained indefinitely.

3.44 Protective conductor (symbol PE)- a conductorrequired by some measures for protection against electricshock for electrically connecting any of the followingparts:

(a) Exposed conductive parts.(b) Extraneous conductive parts.(c) Main earthing terminal.(d) Earth electrode.(e) Earthed point of the source or artificial neutral.

(IEV 826-04-05)3.45 Neutral conductor (symbol N) - a conductor

connected to the neutral point of a system and capable ofcontributing to the transmission of electrical energy.

(IEV 826-01-03)

3.46 PEN conductor- a earthed conductor combiningthe functions of both a protective conductor and neutralconductor.

NOTE: The acronym PEN results from the combination of bothsymbols PE for the protective conductor and N for the neutralconductor. (IEV 826-04-06)

3.47 Equipotential bonding conductor- a protectiveconductor for ensuring equipotential bonding.

(IEV 826-04-10)

3.48 Equipotential bonding - electrical connectionputting various exposed conductive parts and extraneousconductive parts at a substantially equal potential.

(IEV 826-04-09)

3.49 Earthable point- the point in the power system(e.g. of the transformer or generator) which would beconnected to earth if the system were to be earthed.

NOTE: The earthable point may be the neutral point depending onthe type of power system.

3.50 Earthing conductor - a protective conductorconnecting the main earthing terminal or bar to the earthelectrode. (IEV 826-04-07)

3.51 Main earthing terminal (main earthing bar)- a

terminal or bar provided for the connection of protectiveconductors, including equipotential bonding conductorsand conductors for functional earthing if any, to themeans of earthing. (IEV 826-04-08)

3.52 Earth electrode- a conductive part or a group ofconductive parts in intimate contact with and providingan electrical connection with earth. (IEV 826-04-02)

3.53 Insulation monitoring device - a device whichcauses a signal to be given in the event of reducedinsulation resistance to earth.

3.54 Safety circuits and devices- circuits and devicesdesigned to prevent danger to persons or livestock anddamage to plant in the event of abnormal or

unintentional operation, but not including circuits anddevices for protection against shock or thermal effects ofoverload or fault current.

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3.55 Movable distribution cable- an insulated cablethat may be moved from time to time according to theoperation without necessarily following the movementsof the machinery.

3.56 Reeling (drum) cable - an insulated cablespecially designed to be frequently reeled on and off a

cable drum or reeler mounted on a mobile machine.

3.57 Trailing cable - an insulated cable speciallydesigned to be moved in conjunction with a mobilemachine.

3.58 Armour (of a cable) - a covering consisting ofmetal tapes or wires used to protect the cable fromexternal mechanical effects.

3.59 Overhead line - an electric line, having bare orinsulated conductors, supported to maintain a specifiedminimum distance above ground level.

3.60 Overhead distribution line (feeder) - aninterconnecting overhead line between the distribution

substation and load point.

3.61 Overhead traction (trolley wire) - an overheadline having bare conductors used for supplying vehicles(e.g. locomotives) by means of a collector or pantograph.

3.62 Overhead traction distribution line (feeder)- anoverhead line having bare or insulated conductors usedfor the interconnecting line between the power source

and traction wire.

3.63 Overhead collector wire- an overhead line usedfor supplying moving machinery, such as a reclaimer, bymeans of a collector.

3.64 Continuous duty - a duty at a substantiallyconstant load for an indefinitely long time.

(IEV 151-04-08)

3.65 Periodic or cyclic duty- a type of duty in whichoperation whether at constant or variable load isregularly repeated. (IEV 151-04-11)

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AS 3007.11987 8

APPENDIX A

INDEX OF TERMS

A

Armour (of a cable) . . . . . . . . . . . . . . . . . . . . . . . . 3.58Arms reach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.30

B

Barrier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.31

C

Closed electrical operating area . . . . . . . . . . . . . . . . . 3.7Continuous duty . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.64Conventional touch voltage limit (symbol UL) . . . . . . . 3.43Cyclic duty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.65

D

Direct contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.28Drum cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.56

E

Earth electrode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.52Earth fault current . . . . . . . . . . . . . . . . . . . . . . . . . . 3.36Earthable point . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.49Earthing conductor . . . . . . . . . . . . . . . . . . . . . . . . . . 3.50Electrical equipment . . . . . . . . . . . . . . . . . . . . . . . . . 3.4

Electrical installation . . . . . . . . . . . . . . . . . . . . . . . . 3.3Electrical operating area . . . . . . . . . . . . . . . . . . . . . 3.6Enclosure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.32Equipotential bonding . . . . . . . . . . . . . . . . . . . . . . . 3.48Equipotential bonding conductor . . . . . . . . . . . . . . . . 3.47Exposed conductive part . . . . . . . . . . . . . . . . . . . . . 3.26External power supply . . . . . . . . . . . . . . . . . . . . . . . 3.21Extraneous conductive part . . . . . . . . . . . . . . . . . . . . 3.27

F

Fault current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.35Fixed apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.19

H

Haulage truck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.15Highest voltage (of a three-phase system) . . . . . . . . . 3.40

I

IT system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.24Indirect contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.29Instructed persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.9Insulation monitoring device . . . . . . . . . . . . . . . . . . . 3.53

L

Leakage current (in an installation) . . . . . . . . . . . . . . 3.37Live parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.25

M

Main earthing bar . . . . . . . . . . . . . . . . . . . . . . . . . . 3.51Main earthing terminal . . . . . . . . . . . . . . . . . . . . . . . 3.51Mobile apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.17Movable apparatus . . . . . . . . . . . . . . . . . . . . . . . . . 3.18Movable distribution cable . . . . . . . . . . . . . . . . . . . . 3.55

N

Neutral conductor (symbol N) . . . . . . . . . . . . . . . . . . 3.45Nominal voltage (of a three-phase system) . . . . . . . . 3.39Normal operating area . . . . . . . . . . . . . . . . . . . . . . . 3.5

O

Obstacle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.33Open-cast mine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1Open-cut mine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.1Operating area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.5Ordinary persons . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.8Overhead collector wire . . . . . . . . . . . . . . . . . . . . . . 3.63Overhead distribution line (feeder) . . . . . . . . . . . . . . 3.60Overhead line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.59Overhead traction (trolley) wire . . . . . . . . . . . . . . . . . 3.61Overhead traction distribution line (feeder) . . . . . . . . . 3.62

P

PEN conductor . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.46Periodic or cyclic duty . . . . . . . . . . . . . . . . . . . . . . 3.65Portable apparatus . . . . . . . . . . . . . . . . . . . . . . . . . . 3.16

Primary processing machinery . . . . . . . . . . . . . . . . . . 3.13Prospective touch voltage . . . . . . . . . . . . . . . . . . . . 3.42Protective conductor (symbol PE) . . . . . . . . . . . . . . . 3.44Protective systems and devices . . . . . . . . . . . . . . . . . 3.34

Q

Quarry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.2

R

Reeling cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.56Residual current . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.38

S

Safety circuits and devices . . . . . . . . . . . . . . . . . . . . 3.54Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.31Stacking machinery . . . . . . . . . . . . . . . . . . . . . . . . . 3.11Secondary processing machinery . . . . . . . . . . . . . . . . 3.14Self-contained power supply . . . . . . . . . . . . . . . . . . 3.20Skilled persons . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.10

T

TT system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.23TN system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.22Touch voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.41Trailing cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.57Transport conveying system . . . . . . . . . . . . . . . . . . . 3.12

W

Winning and stacking machinery . . . . . . . . . . . . . . . . 3.11

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9 AS 3007.11987

ANNEX

SUMMARY OF TECHNICAL DEVIATIONS BETWEEN THISSTANDARD AND IEC 621-1

Clause 1.1. Items (e), (f) and (g) of the corresponding clause in IEC 621-1 have been omitted (andsubsequent items redesignated) as the equipment described is not specifically covered in the IEC 621 seriesand is unlikely to be dealt with in the future.

Clause 3.25. The words but, by convention, not a PEN conductor have been deleted from the end of thedefinition since, under certain installation conditions, PEN conductors carry neutral currents and hence mustbe regarded as a live part.

Clauses 3.39 and 3.40. These are additional definitions taken from IEC 71-1.

Clause 3.43. The definition has been simplified in order to make it more easily understood.

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Documents

As 3007.1 - Electrical Installations