Bsi bs en 60719 1993 (1999)

BRITISH STANDARD BS EN 60719 1993 IEC 719 1992 Calculation of the lower and upper limits for the average outer dimensions of cables with circular copper conductors and of rated voltages up to and incl[.]

BRITISH STANDARD BS EN

60719:1993 IEC 719:1992

Calculation of the lower

and upper limits for the

average outer

dimensions of cables

with circular copper

conductors and of rated

voltages up to and

including 450/750 V —

The European Standard EN 60719:1993 has the status of a

British Standard

UDC 621.315.2.001.24:621.315.61:621.3.022

This British Standard, having

been prepared under the direction

of the Cables and Insulation

Standards Policy Committee, was

published under the authority of

the Standards Board and comes

into effect on

15 November 1993

© BSI 09-1999

The following BSI references

relate to the work on this

standard:

Committee reference CIL/20

Special announcement in

BSI News, September 1993

ISBN 0 580 22591 7

Cooperating organizations

The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries:

Amendments issued since publication

Amd No Date Comments

BS EN 60719:1993

Contents

Page Cooperating organizations Inside front cover

2 Lower limit for the average outer diameter 3

3 Upper limit for the average outer diameter 4

4 Thickness of the mandatory coverings other than the

Annex ZA (normative) Other international publications quoted in this standard with the references of the relevant European publications 6 National annex NA (informative) Committees responsible Inside back cover Table 1 — Diameter of circular copper conductors for cables for fixed wiring 4 Table 2 — Diameter of circular copper conductors for flexible cables and cords 5

ii © BSI 09-1999

National foreword

This British Standard has been prepared under the direction of the Cables and Insulation Standards Policy Committee and is the English language version of

EN 60719:1993 Calculation of the lower and upper limits for the average outer

dimensions of cables with circular copper conductors and of rated voltages up to and including 450 /750 V, published by the European Committee for

Electrotechnical Standardization (CENELEC) It is identical with IEC 719:1992 published by the International Electrotechnical Commission (IEC)

Related British Standards to IEC 502 are BS 5467:1989 and BS 6622:1991 However, neither of these British Standards contains the specific part of IEC 502,

namely Appendix A The fictitious calculation method for determination of

dimensions of protective coverings.

The foreword of EN 60719 makes reference to the “date of withdrawal” (dow)

of the relevant national standard In this case, there is no relevant British Standard

A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 6, an inside back cover and a back cover

This standard has been updated (see copyright date) and may have had amendments incorporated This will be indicated in the amendment table on the inside front cover

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

EN 60719

August 1993

UDC 621.315.2.001.24:621.315.61:621.3.022

Descriptors: Electric cable, low voltage equipment, flexible cable, flexible conductor, dimension measure, minimum value, maximum

value, calculation

English version Calculation of the lower and upper limits for the average outer dimensions of cables with circular copper conductors and of rated voltages up to and including 450/750 V

(IEC 719:1992)

Calcul des valeurs minimales et maximales des

dimensions extérieures moyennes des

conducteurs et câbles à âmes circulaires en

cuivre et de tension nominale au plus égale

à 450/750 V

(CEI 719:1992)

Berechnung der unteren und oberen Grenzen der mittleren Außenmaße von Leitungen mit runden Kupferleitern und Nennspannungen bis 450/750 V

(IEC 719:1992)

This European Standard was approved by CENELEC on 1993-07-06

CENELEC members are bound to comply with the CEN/CENELEC Internal

Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration

Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any

CENELEC member

This European Standard exists in three official versions (English, French,

German) A version in any other language made by translation under the

responsibility of a CENELEC member into its own language and notified to the

Central Secretariat: has the same status as the official versions

CENELEC members are the national electrotechnical committees of Austria,

Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,

Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and

United Kingdom

CENELEC

European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B-1050 Brussels

© 1993 Copyright reserved to CENELEC members

Ref No EN 60719:1993 E

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© BSI 09-1999

2

Foreword

At the request of the CENELEC Technical

Committee TC 20, Electric cables, the International

Standard IEC 719:1992 was submitted to the

CENELEC Unique Acceptance Procedure (UAP) in

September 1992 for acceptance as a European

Standard

The text of the International Standard was

approved by CENELEC as EN 60719

on 6 July 1993

The following dates were fixed:

Annexes designated “normative” are part of the

body of the standard In this standard,

Annex ZA is normative

— latest date of publication

of an identical national

standard (dop) 1994-03-01

— latest date of withdrawal

of conflicting national

standards (dow) 1994-03-01

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EN 60719:1993

1 General

1.1 Scope

This International Standard specifies a method for

calculation of the lower and upper limits for the

average outer diameter of cables and the outer

dimensions of flat cords with circular copper

conductors and of rated voltages up to and

including 450/750 V

This standard is not applicable to mineral insulated

cables The method shall not be used to calculate the

diameter over the core assembly for determining the

sheath thickness; the method given in Appendix A of

IEC 502 shall be used for this purpose

NOTE 1 It is stressed that the conductor diameters given in the

tables are intended only for use in this standard as a basis for

calculation and are not intended for verification by

measurement.

NOTE 2 The factors given in 2.5 and 3.1 of this standard may

be varied in preparing standards for cables in which the number

of cores, the hardness of the insulation, precise positioning of the

conductors or other factors may affect the dimensional tolerances

permissible.

1.2 Normative references

The following normative document contains

provisions which, through reference in this text,

constitute provisions of this International Standard

At the time of publication, the edition indicated was

valid All normative documents are subject to

revision, and parties to agreements based on this

International Standard are encouraged to

investigate the possibility of applying the most

recent edition of the normative document listed

below Members of IEC and ISO maintain registers

of currently valid International Standards

IEC 502:1983 Extruded solid dielectric insulated

power cables for rated voltages from 1 kV up

to 30 kV.

2 Lower limit for the average outer

diameter

2.1 Take as diameter D of the conductor the value

given in Table 1 or Table 2 respectively for cables for

fixed wiring and for flexible cables and cords

2.2 Calculate the nominal diameter over the core by

adding to the appropriate value of the conductor

diameter, obtained as in 2.1, twice the specified

mean value of the thickness of the insulation and of

any other mandatory coverings of the individual

core

2.3 Calculate the nominal diameter over the core

assembly by multiplying the value obtained in 2.2

by the appropriate value of the assembly coefficient

k, given in the following table:

2.4 Calculate the nominal outer diameter Do of the

finished cable by adding to the value obtained in 2.3

twice the specified mean value of the thickness of the sheath (or sheaths) and of the other mandatory coverings, if any, over the core assembly

(see clause 4).

2.5 The lower limit Dmin of the average outer

diameter is obtained by multiplying Do by the factor given:

Number of

cores coefficient Assembly

k

Number of cores coefficient Assembly

k

a Cores assembled in one layer.

w for circular multi-core cables with class 5 or class 6 conductors Dmin = 0,96 Do – 0,3 mm

w for all other constructions Dmin = 0,96 Do mm

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4 © BSI 09-1999

In each case, the value so obtained shall be rounded

off:

— to the nearest first decimal for values less

than 50 mm;

— to the nearest unit for values equal to or

exceeding 50 mm

If the last figure to be retained is followed, before

rounding, by 0, 1, 2, 3 or 4, it shall remain

unchanged (rounding down)

If the last figure to be retained is followed, before

rounding, by 9, 8, 7, 6 or 5, it shall be increased by

one (rounding up)

3 Upper limit for the average outer

diameter

3.1 The upper limit Dmax of the average outer

diameter is calculated to two decimal places using

the nominal outer diameter Do obtained in 2.4 as

follows:

4 Thickness of the mandatory

coverings other than the insulation

and the sheath(s)

The following values shall be used unless otherwise

specified in the cable standard:

Table 1 — Diameter of circular copper conductors for cables for fixed wiring

Examples:

calculated value = 2,449 Dmin = 2,4

calculated value = 2,494 Dmin = 2,5

calculated value = 50,27 Dmin = 50

calculated value = 50,61 Dmin = 51

for rubber cables,

Dmax = Do × 1,2 mm

for PVC cables,

Dmax = Do × 1,16 mm

Dmax is rounded off in the same way as Dmin

(see 2.5).

Film separator between conductor

and insulation 0,08 mm

Proofed textile type, textile braid

round each core 0,15 mm

Film separator over laid up cores 0,15 mm

Proofed textile tape separator over

Separator between two layers of a

Outer textile braid 0,30 mm

Metal braid 2,5 times diameter of

the component wire in millimetres

Longitudinally applied metal tape with overlap

in combination with drain wires

1,5 times thickness of the component tape in millimetres

Nominal cross-sectional area

mm 2

Class 1 Class 2 Nominal

diameter of conductora for calculation

mm

Nominal diameter of conductora for calculation

mm

0,5 0,75 1 1,5 2,5 4 6 10 16 25 35 50 70 95 120 150 185 240 300 400 500 630 800

1 000

0,80 0,95 1,10 1,35 1,75 2,2 2,7 3,5 4,4 5,6 6,5 7,6 9,1 10,7 12,0 13,4

0,85 1,05 1,20 1,45 1,85 2,35 2,9 3,8 4,7 6,0 7,0 8,2 9,8 11,5 13,0 14,4 16,1 18,5 20,7 23,4 26,2 29,8 33,8 37,9

a See note 1 in 1.1

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EN 60719:1993

Table 2 — Diameter of circular copper

conductors for flexible cables and cords

Nominal

cross-sectional area

Classes 5 and 6 Nominal diameter of conductorafor calculation

0,5

0,75

1

1,5

2,5

4

6

10

16

25

35

50

70

95

120

150

185

240

300

400

500

630

0,95 1,10 1,25 1,50 1,95 2,50 3,0 3,9 5,0 6,4 7,7 9,2 11,0 12,5 14,2 15,8 17,5 20,1 22,5 25,8 29,0 33,7

a See note 1 in 1.1.

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6 © BSI 09-1999

Annex ZA (normative)

Other international publications quoted in this standard with the references of the relevant European publications

When the international publication has been modified by CENELEC common modifications, indicated by (mod), the relevant EN/HD applies

IEC publication Date Title EN/HD Date

502 1983 Extruded solid dielectric insulated power cables for

rated voltages from 1 kV up to 30 kV — —

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BS EN 60719:1993

National annex NA (informative)

Committees responsible

The United Kingdom participation in the preparation of this European Standard was entrusted by the Cables and Insulation Standards Policy Committee (CIL/-) to Technical Committee CIL/20, upon which the following bodies were represented:

Association of Consulting Engineers

Association of Manufacturers of Domestic Electrical Appliances

BECCAMA (BEAMA Electrical Cable Conductor Accessory Manufacturers’ Association)

British Approvals Service for Cables

British Cable Makers’ Confederation

British Plastics Federation

British Steel Industry

Department of Trade and Industry (Consumer Safety Unit CA Division)

Electricity Association

Engineering Equipment and Materials Users’ Association

Institution of Electrical Engineers

London Regional Transport

PSA Projects Ltd

The following bodies were also represented in the drafting of the standard, through subcommittees and panels:

Association of Manufacturers Allied to the Electrical and Electronic Industry (BEAMA Ltd.)

British Electrical Systems Association (BEAMA Ltd.)

British Non-ferrous Metals Federation

British Steel plc

Chartered Institution of Building Services Engineers

ERA Technology Ltd

Electrical Installation Equipment Manufacturers’ Association (BEAMA Ltd.)

Engineering Industries Association

GAMBICA (BEAMA Ltd.)

Institution of Incorporated Executive Engineers

Lighting Industry Federation Ltd

London Underground Ltd

National Association of Lift Makers

Portable Electric Tool Manufacturers’ Association

Transmission and Distribution Association (BEAMA Limited)

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