Specifications for particular types of winding wires - Part 0-4: General requirements - Glass-fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper wire (IEC 60317-0-4:2020)

This part of IEC 60317 specifies general requirements of glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular copper wire.
The range of nominal conductor dimensions is given in 4.1 and the relevant specification sheet.

Technische Lieferbedingungen für bestimmte Typen von Wickeldrähten - Teil 0-4: Allgemeine Anforderungen - Flachdrähte aus Kupfer, blank oder lackisoliert und umhüllt mit Glasgewebe, imprägniert mit Harz oder Lack (IEC 60317-0-4:2020)

Spécifications pour types particuliers de fils de bobinage - Partie 0-4: Exigences générales - Fil de section rectangulaire en cuivre nu ou émaillé, guipé de fibres de verre imprégnées de vernis ou de résine (IEC 60317-0-4:2020)

IEC 60317-0-4:2020 est disponible sous forme de IEC 60317-0-4:2020 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

IEC 60317-0-4:2020 spécifie les exigences générales relatives aux fils de section rectangulaire en cuivre nus ou émaillés, guipés de fibres de verre imprégnées de vernis ou de résine. La gamme des dimensions nominales des conducteurs est indiquée en 4.1 et dans la feuille de spécifications correspondante. Cette quatrième édition annule et remplace la troisième édition parue en 2015. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- ajout des exigences dimensionnelles pour le fil émaillé de grade 1 dans le Tableau 4;
- ajout des exigences de claquage diélectrique pour le fil émaillé de grade 1 dans le Tableau 7;
- ajout des exigences pour l'essai d'adhérence en 8.2.1 et en 8.2.2.

Specifikacije za posebne vrste navijalnih žic - 0-4. del: Splošne zahteve - Bakrena žica s pravokotnim prerezom, gola ali emajlirana, ovita z optičnimi vlakni in impregnirana s smolo ali lakom (IEC 60317-0-4:2020)

General Information

Status
Published
Publication Date
21-Jul-2020
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jul-2020
Due Date
05-Sep-2020
Completion Date
22-Jul-2020

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SLOVENSKI STANDARD
SIST EN IEC 60317-0-4:2020
01-oktober-2020
Nadomešča:
SIST EN 60317-0-4:2016
Specifikacije za posebne vrste navijalnih žic - 0-4. del: Splošne zahteve - Bakrena
žica s pravokotnim prerezom, gola ali emajlirana, ovita z optičnimi vlakni in
impregnirana s smolo ali lakom (IEC 60317-0-4:2020)
Specifications for particular types of winding wires - Part 0-4: General requirements -
Glass-fibre wound, resin or varnish impregnated, bare or enamelled rectangular copper
wire (IEC 60317-0-4:2020)
Technische Lieferbedingungen für bestimmte Typen von Wickeldrähten - Teil 0-4:
Allgemeine Anforderungen - Flachdrähte aus Kupfer, blank oder lackisoliert und umhüllt
mit Glasgewebe, imprägniert mit Harz oder Lack (IEC 60317-0-4:2020)
Spécifications pour types particuliers de fils de bobinage - Partie 0-4: Exigences
générales - Fil de section rectangulaire en cuivre nu ou émaillé, guipé de fibres de verre
imprégnées de vernis ou de résine (IEC 60317-0-4:2020)
Ta slovenski standard je istoveten z: EN IEC 60317-0-4:2020
ICS:
29.060.10 Žice Wires
77.150.30 Bakreni izdelki Copper products
SIST EN IEC 60317-0-4:2020 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60317-0-4:2020

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SIST EN IEC 60317-0-4:2020


EUROPEAN STANDARD EN IEC 60317-0-4

NORME EUROPÉENNE

EUROPÄISCHE NORM
June 2020
ICS 29.060.10 Supersedes EN 60317-0-4:2016 and all of its
amendments and corrigenda (if any)
English Version
Specifications for particular types of winding wires - Part 0-4:
General requirements - Glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular copper wire
(IEC 60317-0-4:2020)
Spécifications pour types particuliers de fils de bobinage - Technische Lieferbedingungen für bestimmte Typen von
Partie 0-4: Exigences générales - Fil de section Wickeldrähten - Teil 0-4: Allgemeine Anforderungen -
rectangulaire en cuivre nu ou émaillé, guipé de fibres de Flachdrähte aus Kupfer, umsponnen mit Glasgewebe, blank
verre imprégnées de vernis ou de résine oder lackisoliert, imprägniert mit Harz oder Lack
(IEC 60317-0-4:2020) (IEC 60317-0-4:2020)
This European Standard was approved by CENELEC on 2020-06-01. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN IEC 60317-0-4:2020 E

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SIST EN IEC 60317-0-4:2020
EN IEC 60317-0-4:2020 (E)
European foreword
The text of document 55/1835A/FDIS, future edition 4 of IEC 60317-0-4, prepared by IEC/TC 55
"Winding wires" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
EN IEC 60317-0-4:2020.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2021-03-01
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2023-06-01
document have to be withdrawn

This document supersedes EN 60317-0-4:2016 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60317-0-4:2020 was approved by CENELEC as a
European Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards
indicated:
IEC 60264 (series) NOTE Harmonized as EN 60264 (series)
IEC 60317 (series) NOTE Harmonized as EN 60317 (series)

2

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SIST EN IEC 60317-0-4:2020
EN IEC 60317-0-4:2020 (E)
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60851 series Winding wires - Test methods EN 60851 series
ISO 3 - Preferred numbers - Series of preferred numbers - -
- - Copper and copper alloys - Copper drawing stock EN 1977 -
(wire rod)
ISO 1190-1 - Copper and copper alloys - Code of designation - - -
Part 1: Designation of materials for code of
designation
ASTM B49 - Standard Specification for Copper Rod for - -
Electrical Purposes


3

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SIST EN IEC 60317-0-4:2020

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SIST EN IEC 60317-0-4:2020



IEC 60317-0-4

®


Edition 4.0 2020-04




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Specifications for particular types of winding wires –

Part 0-4: General requirements – Glass-fibre wound, resin or varnish

impregnated, bare or enamelled rectangular copper wire




Spécifications pour types particuliers de fils de bobinage –

Partie 0-4: Exigences générales – Fil de section rectangulaire en cuivre nu


ou émaillé, guipé de fibres de verre imprégnées de vernis ou de résine













INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 29.060.10 ISBN 978-2-8322-8220-5




Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN IEC 60317-0-4:2020
– 2 – IEC 60317-0-4:2020 © IEC 2020
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, general notes and appearance . 7
3.1 Terms and definitions . 7
3.2 General notes . 8
3.2.1 Methods of test . 8
3.2.2 Winding wire . 9
3.3 Appearance . 9
4 Dimensions. 9
4.1 Conductor dimensions . 9
4.2 Tolerance on conductor dimensions . 11
4.3 Rounding of corners . 11
4.4 Increase in dimensions due to the insulation . 11
4.5 Overall dimensions . 13
4.5.1 Nominal overall dimensions . 13
4.5.2 Minimum overall dimensions . 13
4.5.3 Maximum overall dimensions . 13
5 Electrical resistance . 13
6 Elongation . 13
7 Springiness . 13
8 Flexibility and adherence . 14
8.1 Mandrel winding test . 14
8.2 Adherence test . 14
8.2.1 Glass-fibre covered bare wires . 14
8.2.2 Glass-fibre covered enamelled wires . 14
9 Heat shock . 14
10 Cut-through . 14
11 Resistance to abrasion . 14
12 Resistance to solvents . 14
13 Breakdown voltage . 14
14 Continuity of insulation . 15
15 Temperature index . 15
16 Resistance to refrigerants . 15
17 Solderability . 15
18 Heat or solvent bonding . 15
19 Dielectric dissipation factor . 15
20 Resistance to transformer oil . 15
21 Loss of mass . 15
23 Pin hole test . 16
30 Packaging . 16

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Annex A (informative) Nominal cross-sectional areas for preferred and intermediate
sizes . 17
Bibliography . 24

Table 1 – Nominal cross-sectional areas of preferred sizes . 10
Table 2 – Conductor tolerances . 11
Table 3 – Corner radii . 11
Table 4 – Increase in dimensions . 12
Table 5 – Elongation . 13
Table 6 – Mandrel winding . 14
Table 7 – Breakdown voltage . 15
Table A.1 – Nominal cross-sectional areas . 17

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INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 0-4: General requirements – Glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular copper wire

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60317-0-4 has been prepared by IEC technical committee 55:
Winding wires.
This fourth edition cancels and replaces the third edition published in 2015. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) addition of dimensional requirements for grade 1 enamelled wire in Table 4;
b) addition of dielectric breakdown requirements for grade 1 enamelled wire in Table 7.
c) addition of requirement for the adherence test in 8.2.1 and 8.2.2.

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SIST EN IEC 60317-0-4:2020
IEC 60317-0-4:2020 © IEC 2020 – 5 –
The text of this publication is based on the following documents:
FDIS Report on voting
55/1835A/FDIS 55/1852/RVD

Full information on the voting for the approval of this document can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This standard is to be read in conjunction with the IEC 60851 series. The clause numbers used
in this standard are identical with the respective test numbers of the IEC 60851 series.
In the case of inconsistencies between IEC 60851 and this standard, the latter prevails.
The numbering of clauses in this standard is not continuous from Clauses 21 through 30 in
order to reserve space for possible future wire requirements prior to those for wire packaging.
A list of all parts in the IEC 60317 series, published under the general title Specifications for
particular types of winding wires, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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INTRODUCTION
This part of IEC 60317 belongs to a series of standards which deals with insulated wires used
for windings in electrical equipment. It is composed of the following series:
1) Winding wires – Test methods (IEC 60851 series);
2) Specifications for particular types of winding wires (IEC 60317 series);
3) Packaging of winding wires (IEC 60264 series).

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SIST EN IEC 60317-0-4:2020
IEC 60317-0-4:2020 © IEC 2020 – 7 –
SPECIFICATIONS FOR PARTICULAR TYPES OF WINDING WIRES –

Part 0-4: General requirements – Glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular copper wire



1 Scope
This part of IEC 60317 specifies general requirements of glass-fibre wound, resin or varnish
impregnated, bare or enamelled rectangular copper wire.
The range of nominal conductor dimensions is given in 4.1 and the relevant specification sheet.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies.
For undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60851 (all parts), Winding wires – Test methods
ISO 3, Preferred numbers – Series of preferred numbers
EN 1977, Copper and copper alloys – Copper drawing stock (wire rod)
ISO 1190-1, Copper and copper alloys − Code of designation – Part 1: Designation of materials
for code of designation
ASTM B49, Standard Specification for Copper Rod for Electrical Purposes
3 Terms, definitions, general notes and appearance
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
coating
material that is deposited on a conductor or wire by a suitable means and then dried and/or
cured
3.1.2
conductor
bare metal after removal of the insulation

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3.1.3
covering
material that is wound, wrapped or braided around a bare or insulated conductor
3.1.4
crack
opening in the insulation that exposes the conductor to view at the stated magnification
3.1.5
enamelled wire
wire coated with an insulation of cured resin
3.1.6
grade
range of thickness of the insulation of a wire
3.1.7
insulation
coating or covering on the conductor with the specific function of withstanding voltage
3.1.8
nominal conductor dimension
designation of the conductor size in accordance with the IEC 60317 series
3.1.9
normal vision
20/20 vision, with corrective lenses if necessary
3.1.10
winding wire
wire used for winding a coil to provide a magnetic field
3.1.11
wire
conductor coated or covered with insulation
3.2 General notes
3.2.1 Methods of test
All methods of test to be used for this document are given in IEC 60851 (all parts).
The clause numbers used in this document are identical to the corresponding test numbers in
the IEC 60851 series of standards.
In the case of inconsistencies between the publication on methods of test and this document,
IEC 60317-0-4 shall prevail.
Where no specific range of nominal conductor dimensions is given for a test, the test applies to
all nominal conductor dimensions covered by the specification sheet.
Unless otherwise specified, all tests shall be carried out at a temperature from 15 °C to 40 °C
and a relative humidity from 25 % to 75 %. Before measurements are made, the specimens
shall be preconditioned under these atmospheric conditions for a time sufficient to allow the
specimens to reach stability.

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IEC 60317-0-4:2020 © IEC 2020 – 9 –
The wire to be tested shall be removed from the packaging in such a way that it is not subjected
to tension or unnecessary bends. Before each test, sufficient wire should be discarded to ensure
that any damaged wire is not included in the test specimens.
3.2.2 Winding wire
When reference is made to a winding wire in accordance with a standard of the IEC 60317
series, the following information is given in the description:
– reference of the IEC specification;
– nominal conductor dimensions in millimetres (width × thickness);
– grade.
EXAMPLE IEC 60317-31 – 4,00 × 1,00 Grade 2GL1
3.3 Appearance
The fibrous covering shall be essentially smooth as agreed upon between the customer and the
supplier in accordance with good commercial practice, and free from physical damage and
foreign material when examined with normal vision, as wound on the original spool or reel.
The fibres shall be wound evenly, bound to the copper or coating and not loose.
NOTE Evidence of physical damage includes gashes, broken fibre strands, and the like.
4 Dimensions
4.1 Conductor dimensions
The dimensions for widths and thicknesses of conductors of winding wires with rectangular
cross-section, recommended in this document, shall be in accordance with Table 1, and are
taken from the R 20 series in ISO 3.
Preferred and intermediate sizes are combinations of width and thickness, both in accordance
with the R 20 series.
Intermediate sizes are combinations of width or thickness in accordance with the R 20 series
with the other dimension in accordance with the R 40 series.
This document covers:
– widths from 2,00 mm up to and including 16,00 mm;
– thicknesses from 0,80 mm up to and including 5,60 mm.
For thickness over 5,60 mm up to and including 10 mm and for widths over 16 mm up to and
including 25 mm where, the R 40 series shall be used when, for technical reasons, additional
sizes may be needed. The ratio width/thickness shall be within the specified limits, and
combinations of R 40 and R 40 are not allowed in the case of additional sizes.
The ratio width/thickness shall be greater than or equal to 1,4:1 and shall not exceed 8:1.
The actual values of dimensions are given in Table 1.
The nominal cross-sectional areas for preferred sizes are given in Table 1 and the nominal
cross-sectional areas for intermediate sizes are given in Annex A.

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SIST EN IEC 60317-0-4:2020

Table 1 – Nominal cross-sectional areas of preferred sizes
Thickness
mm 0,80 0,90 1,00 1,12 1,25 1,40 1,60 1,80 2,00 2,24 2,50 2,80 3,15 3,55 4,00 4,50 5,00 5,60
a a a a a
Corner radius (0,5 mm ) Corner radius (0,5 mm ) Corner radius (0,65 mm ) Corner radius (0,80 mm ) Corner radius (1,0 mm )
2,00 1,463 1,626 1,785 2,025 2,285 2,585
2,24 1,655 1,842 2,205 2,294 2,585 2,921 3,369
2,50 1,863 2,076 2,285 2,585 2,910 3,285 3,785 4,137
Not recommended
2,80 2,103 2,346 2,585 2,921 3,285 3,705 4,265 4,677 5,237
Ratio width/thickness smaller than 1,4:1
3,15 2,383 2,661 2,935 3,313 3,723 4,195 4,825 5,307 5,937 6,693
3,55 2,703 3,021 3,335 3,761 4,223 4,755 5,465 6,027 6,737 7,589 8,326
4,00 3,063 3,426 3,785 4,265 4,785 5,385 6,185 6,831 7,637 8,597 9,451 10,65
4,50 3,463 3,876 4,285 4,825 5,410 6,085 6,85 7,737 8,631 9,717 10,70 12,05 13,63
5,00 3,863 4,326 4,785 5,385 6,035 6,785 7,785 8,637 9,637 10,84 12,18 13,45 15,20 17,20
5,60 4,363 4,866 5,385 6,057 6,785 7,625 8,745 9,717 10,84 12,18 13,45 15,13 17,09 19,33 21,54
6,30 4,903 5,496 6,085 6,841 7,660 8,605 9,865 10,98 12,24 13,75 15,20 17,09 19,30 21,82 24,34 27,49
7,10 6,216 6,885 7,737 8,660 9,725 11,15 12,42 13,84 15,54 17,20 19,33 21,82 24,66 27,54 31,09 34,64
8,00  7,785 8,745 9,785 10,99 12,59 14,04 15,64 17,56 19,45 21,85 24,65 27,85 31,14 35,14 39,14 43,94
9,00  9,865 11,04 12,39 14,19 15,84 17,64 19,80 21,95 24,65 27,80 31,40 35,14 39,64 44,14 49,54
10,0   12,29 13,79 15,79 17,64 19,64 22,04 24,45 27,45 30,95 34,95 39,14 44,14 49,14 55,14
11,2   15,47 17,71 19,80 22,04 24,79 27,46 30,81 34,73 39,21 43,94 49,54 55,14 61,86
12,5    19,79 22,14 24,64 27,64 30,70 34,45 38,83 43,83 49,14 55,39 61,64 69,14
Not recommended
Ratio width/thickness over 8:1
14,0    24,84 27,64 31,00 34,45 38,65 43,55 49,15 55,14 62,14 69,14 77,54
16,0     31,64 35,48 39,45 44,25 49,85 56,25 63,14 71,14 79,14 88,74
a
Nominal thickness

Width

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4.2 Tolerance on conductor dimensions
The conductor dimensions shall not differ from the nominal values by more than the tolerance
given in Table 2.
Table 2 – Conductor tolerances
Nominal width or thickness
of the conductor
Tolerance
mm
Up to and mm
Over
including
– 3,15
±0,030
3,15 6,30 ±0,050
6,30 12,50 ±0,070
12,50 16,00 ±0,100

4.3 Rounding of corners
The arc shall merge smoothly into the flat surfaces of the conductor and the strip shall be free
from sharp, rough and projecting edges. The conductor shall have corner radii complying with
Table 3. The specified radii shall be maintained within ±25 %.
Table 3 – Corner radii
Nominal thickness
of the conductor
Corner radius
mm
Up to and mm
Over
including
– 1,00 0,5 nominal thickness
a
1,00 1,60
0,50
b
1,60 2,24 0,65
2,24 3,55 0,80
3,55 5,60 1,00
5,60 10,00 1,25
If
...

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