oSIST prEN IEC 60228:2022
(Main)Conductors of insulated cables
Conductors of insulated cables
Leiter für Kabel und isolierte Leitungen
Ames des câbles isolés
Vodniki izoliranih kablov
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN IEC 60228:2022
01-oktober-2022
Vodniki izoliranih kablov
Conductors of insulated cables
Leiter für Kabel und isolierte Leitungen
Ames des câbles isolés
Ta slovenski standard je istoveten z: prEN IEC 60228:2022
ICS:
29.060.20 Kabli Cables
oSIST prEN IEC 60228:2022 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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oSIST prEN IEC 60228:2022
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oSIST prEN IEC 60228:2022
20/2031/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60228 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-08-12 2022-11-04
SUPERSEDES DOCUMENTS:
20/1995/CD, 20/2018A/CC
IEC TC 20 : ELECTRIC CABLES
SECRETARIAT: SECRETARY:
Germany Mr Walter Winkelbauer
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:
Other TC/SCs are requested to indicate their interest, if any,
in this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which
they are aware and to provide supporting documentation.
TITLE:
Conductors of insulated cables
PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
Copyright © 2022 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download
this electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee
positions. You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other
purpose without permission in writing from IEC.
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oSIST prEN IEC 60228:2022
20/2031/CDV – 2 – IEC CDV 60228 © IEC:2022
1
2
3 CONTENTS
4
5 FOREWORD . 4
6 INTRODUCTION . 6
7 Scope . 7
8 Normative references . 7
9 Terms and definitions . 7
10 3.1 Metal-coated . 7
11 3.2 Nominal cross-sectional area . 7
12 3.3 Milliken conductor . 7
13 Classification . 7
14 Materials . 8
15 5.1 Introduction . 8
16 5.2 Solid aluminium conductors . 8
17 5.3 Circular and shaped stranded aluminium conductors . 8
18 Solid conductors and stranded conductors . 8
19 6.1 Solid conductors (class 1) . 8
20 6.1.1 Construction . 8
21 6.1.2 Resistance . 9
22 6.2 Stranded circular non-compacted conductors (class 2) . 9
23 6.2.1 Construction . 9
24 6.2.2 Resistance . 9
25 6.3 Stranded compacted circular conductors and stranded shaped
26 conductors (class 2) . 9
27 6.3.1 Construction . 9
28 6.3.2 Resistance . 10
29 6.4 Milliken conductors (class 2) . 10
30 6.4.1 Construction . 10
31 6.4.2 Resistance . 10
32 Flexible conductors (classes 5 and 6) . 10
33 7.1 Construction . 10
34 7.2 Resistance . 10
35 Check of compliance with Clauses 6 and 7 . 10
36 Annex A (normative) Measurement of resistance . 15
37 Annex B (informative) Exact formulae for the temperature correction factors . 17
38 Annex C (informative) Guidance on the dimensional limits of circular conductors . 18
39 C.1 Purpose . 18
40 C.2 Dimensional limits for circular copper conductors . 18
41 C.3 Dimensional limits for stranded compacted circular copper, aluminium
42 and aluminium alloy conductors . 18
43 C.4 Dimensional limits for circular solid aluminium conductors . 18
44
45 Table 1 – Class 1 solid conductors for single-core and multi-core cables . 11
46 Table 2 – Class 2 stranded conductors for single-core and multi-core cables . 12
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47 Table 3 – Class 5 flexible copper conductors for single-core and multi-core cables . 13
48 Table 4 – Class 6 flexible copper conductors for single-core and multi-core cables . 14
k
49 Table A.1 – Temperature correction factors for conductor resistance to correct the
t
50 measured resistance at t ºC to 20 ºC . 16
51 Table C.1 – Maximum diameters of circular copper conductors –
52 solid, non-compacted stranded and flexible . 19
53 Table C.2 – Minimum and maximum diameters of stranded compacted circular copper,
54 aluminium and aluminium alloy conductors . 20
55 Table C.3 – Minimum and maximum diameters of solid circular aluminium conductors . 21
56
57
58
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59 INTERNATIONAL ELECTROTECHNICAL COMMISSION
60 ____________
61
62 CONDUCTORS OF INSULATED CABLES
63
64
65
66
67 FOREWORD
68 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
69 all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
70 international co-operation on all questions concerning standardization in the electrical and electronic fields. To
71 this end and in addition to other activities, IEC publishes International Standards, Technical S pecifications,
72 Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
73 Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
74 in the subject dealt with may participate in this preparatory work. International, governmental and non-
75 governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
76 with the International Organization for Standardization (ISO) in accordance with conditions determined by
77 agreement between the two organizations.
78 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
79 consensus of opinion on the relevant subjects since each technical committee has representation from all
80 interested IEC National Committees.
81 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
82 Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
83 Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
84 misinterpretation by any end user.
85 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
86 transparently to the maximum extent possible in their national and regional publications. Any divergence
87 between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
88 the latter.
89 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
90 assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
91 services carried out by independent certification bodies.
92 6) All users should ensure that they have the latest edition of this publication.
93 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
94 members of its technical committees and IEC National Committees for any personal injury, property damage or
95 other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
96 expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
97 Publications.
98 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
99 indispensable for the correct application of this publication.
100 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
101 patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
102 International Standard IEC 60228 has been prepared by technical committee 20: Electric
103 cables.
104 This fourth edition cancels and replaces the third edition published in 2004. This edition
105 constitutes a technical revision.
106 This edition includes the following significant technical changes with respect to the previous
107 edition:
108 a) Milliken conductors description
109 b) Nominal cross-sectional areas above 2500 mm²
110 c) Guidance for dimensional limits of stranded compacted circular conductors made with pre-
111 shaped wires (Class 2)
112 d) New 2500 mm² aluminium resistance value.
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113 For legacy systems where the conductor was designed taking into account the values
114 presented in previous editions and no longer tabulated, then the original design can be
115 maintained and still utilized.
116 The suppliers can furthermore utilize such superseded design either in systems already
117 designed and qualified but not delivered or e.g. to produce repair and additional spare
118 lengths for delivered systems.
119 The choice of utilizing the original superseded design or a new one based on the new
120 resistance tabulated values is to be agreed between supplier and final users.
121 The text of this standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/RVD
122
123 Full information on the voting for the approval of this standard can be found in the report on
124 voting indicated in the above table.
125 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
126 The committee has decided that the contents of this publication will remain unchanged until
127 the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
128 related to the specific publication. At this date, the publication will be
129 • reconfirmed,
130 • withdrawn,
131 • replaced by a revised edition, or
132 • amended.
133
134 Conductors described in IEC 60228 are specified in metric sizes.
135
136
137
138
139 The National Committees are requested to note that for this publication the stability date
140 is 20XX.
141 THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
142 AT THE PUBLICATION STAGE.
143
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144 INTRODUCTION
145 IEC 60228 is intended as a fundamental reference standard for IEC Technical Committees
146 and National Committees in drafting standards for electric cables, and to the National
147 Committees in drafting specifications for use in their own countries. These committees should
148 select from the tables of this general standard the conductors appropriate to the particular
149 applications with which they are concerned and either include the applicable details in their
150 cable specifications or make appropriate references to this standard.
151
152
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153 CONDUCTORS OF INSULATED CABLES
154
155
156
157 Scope
158 This International Standard specifies the nominal cross-sectional areas, in the range 0,5 mm²
159 to 3500 mm², for conductors in electric power cables and cords of a wide range of types.
160 Requirements for numbers and sizes of wires and resistance values are also included. These
161 conductors include solid, stranded and Milliken, copper, aluminium and aluminium alloy
162 conductors in cables for fixed installations and flexible copper conductors.
163 The standard does not apply to conductors for telecommunication purposes.
164 The applicability of this standard to a particular type of cable is as specified in the standard
165 for the type of cable.
166 Unless indicated to the contrary in a particular clause, this standard relates to the conductors
167 in the finished cable and not to the conductor as made or supplied for inclusion into a cable.
168 Informative annexes are included giving supplementary information covering temperature
169 correction factors for resistance measurement (Annex B) and dimensional limits of circular
170 conductors (Annex C).
171 Normative references
172 There are no normative references in this document.
173 Terms and definitions
174 For the purposes of this document, the following terms and definitions apply.
175 3.1 Metal-coated
176 Coated with a thin layer of suitable metal, such as tin or tin alloy
177 3.2 Nominal cross-sectional area
178 Value that identifies a particular size of conductor but is not subject to direct measurement
179 NOTE 1 to entry: Each particular size of conductor in this standard is required to meet a maximum resistance
180 value.
181 3.3 Milliken conductor
182 Stranded conductor comprising an assembly of shaped conductors, lightly insulated from each
183 other.
184 Classification
185 The conductors have been divided into four classes, 1, 2, 5 and 6. Those in classes 1 and 2
186 are intended for use in cables for fixed installations. Classes 5 and 6 are intended for use in
187 flexible cables and cords but may also be used for fixed installations.
188 - Class 1: solid conductors.
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189 - Class 2: stranded conductors.
190 - Class 5: flexible conductors.
191 - Class 6: flexible conductors made with smaller diameter wires than class 5 for the same
192 nominal conductor cross section.
193 Materials
194 5.1 Introduction
195 The conductors shall consist of one of the following (except for the Milliken central element):
196 - plain or metal-coated annealed copper;
197 - aluminium or aluminium alloy.
198
199 The wires of Milliken conductors can be oxidised or enamelled.
200
201 5.2 Solid aluminium conductors
202 Circular and shaped solid aluminium conductors shall be made from aluminium such that the
203 tensile strength of the completed conductor is within the following limits:
204
Nominal cross-sectional area Tensile strength
mm² N/mm²
10 and 16 110 to 165
25 and 35 60 to 130
50 60 to 110
70 and above 60 to 90
205 There are no limits defined for tensile strength of aluminium alloy solid conductors.
206
207 5.3 Circular and shaped stranded aluminium conductors
208 Stranded aluminium conductors shall be made from aluminium such that tensile strength of
209 the individual wires is within the following limits:
210
Nominal cross-sectional area Tensile strength
mm² N/mm²
10 up to 200
16 and above 125 to 205
211 There are no limits defined for tensile strength of aluminium alloy solid conductors.
212 This data can only be checked on wires taken before stranding and not on wires taken from a
213 stranded conductor.
214
215 Solid conductors and stranded conductors
216 6.1 Solid conductors (class 1)
217 6.1.1 Construction
218 a) Solid conductors or conductor wires shall consist of one of the materials specified in
219 Clause 5.
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oSIST prEN IEC
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