IEC 60245-1:2026

IEC 60245-1 ®
Edition 5.0 2026-03
INTERNATIONAL
STANDARD
REDLINE VERSION
Rubber insulated cables - Rated voltages up to and including 450/750 V -
Part 1: General requirements
ICS 29.060.20; 25.160.20 ISBN 978-2-8327-1153-8
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CONTENTS
FOREWORD . 3
1 General .
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
2.1 Definitions relating to insulating and sheathing materials .
2.2 Definitions relating to the tests .
4 Marking . 8
4.1 Indication of origin and cable identification . 8
4.1.1 General . 8
4.1.2 Continuity of marks . 8
4.2 Durability . 8
4.3 Legibility . 8
5 Core identification . 9
5.1 General . 9
5.2 Core identification by colours . 9
5.2.1 General requirements . 9
5.2.2 Colour scheme . 9
5.2.3 Colour combination green-and-yellow . 10
5.3 Core identification by numbers . 10
5.3.1 General requirements . 10
5.3.2 Preferred arrangement of Requirements for marking arrangements . 10
5.3.3 Durability . 10
6 General requirements for the construction of cables . 11
6.1 Conductors . 11
6.1.1 Material . 11
6.1.2 Construction . 11
6.1.3 Separator between conductor and insulation . 11
6.1.4 Construction verification Check on construction . 11
6.1.5 Electrical resistance . 11
6.2 Insulation . 11
6.2.1 Material . 11
6.2.2 Application to the conductor . 12
6.2.3 Thickness . 12
6.2.4 Mechanical properties before and after ageing . 12
6.3 Filler . 15
6.3.1 Material . 15
6.3.2 Application . 16
6.4 Textile braid . 16
6.4.1 Material . 16
6.4.2 Application . 16
6.5 Sheath . 16
6.5.1 Material . 16
6.5.2 Application . 16
6.5.3 Thickness . 20
6.5.4 Mechanical properties before and after ageing . 20
6.6 Tests on completed cables . 20
6.6.1 Electrical properties . 20
6.6.2 Overall dimensions . 20
6.6.3 Mechanical strength of flexible cables . 21
7 Guidance on use of the cables. 25
Annex A (normative) Code designation . 26
Annex B (normative) Calculation method for determination of the thickness of sheath
of cable types 60245 IEC 53, 60245 IEC 57 and 60245 IEC 66 of IEC 60245-4 . 28
B.1 General . 28
B.2 Formulae for the calculation . 28
B.3 Rounding off of numbers for the calculation of the thickness of sheath . 29
Bibliography .

Figure 1 – Arrangement of marking by numbers . 10

Table 1 – Requirements for non-electrical tests for cross-linked rubber insulation . 13
Table 2 – Requirements for non-electrical tests for cross-linked rubber sheath . 17
Table 3 – Requirements for electrical tests for cross-linked rubber insulated cables . 21
Table 4 – Mass of weight and diameter of pulleys . 23
Table 5 – Current loading . 24
Table 5 – Requirements for the static flexibility test for lift cables .
Table 6 – Requirements for the static flexibility test for arc-welding electrode cables . 24
Table B.1 – Fictitious diameter per nominal cross-sectional area . 29
Table B.2 – Assembly coefficient k for cables having no more than five cores . 29

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Rubber insulated cables -
Rated voltages up to and including 450/750 V -
Part 1: General requirements
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,
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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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
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6) All users should ensure that they have the latest edition of this publication.
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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) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). IEC takes no position concerning the evidence, validity or applicability of any claimed patent rights in
respect thereof. As of the date of publication of this document, IEC had not received notice of (a) patent(s), which
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the latest information, which may be obtained from the patent database available at https://patents.iec.ch. IEC
shall not be held responsible for identifying any or all such patent rights.
This redline version of the official IEC Standard allows the user to identify the changes made
to the previous edition IEC 60245-1:2003+AMD1:2007 CSV. A vertical bar appears in the
margin wherever a change has been made. Additions are in green text, deletions are in
strikethrough red text.
IEC 60245-1 has been prepared by IEC technical committee TC 20: Electric cables. It is an
International Standard.
This fifth edition cancels and replaces the fourth edition published in 2003, and
Amendment 1:2007. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) reference to IEC 60245-2 for the tests has been deleted and replaced by IEC 63294;
b) reference to lift cable according to IEC 60245-5 has been deleted;
c) normative references have been updated.
The text of this International Standard is based on the following documents:
Draft Report on voting
20/2271/FDIS 20/2280/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this International Standard is English.
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications.
A list of all the parts in the IEC 60245 series, published under the general title Rubber insulated
cables - Rated voltages up to and including 450/750 V, 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 webstore.iec.ch in the data related to the
specific document. At this date, the document will be
– reconfirmed,
– withdrawn, or
– revised.
1 General
1 Scope
This part of IEC 60245 applies to rigid and flexible cables with insulation, and sheath if any,
based on vulcanized rubber of rated voltages U /U up to and including 450/750 V used in power
o
installations of nominal voltage not exceeding 450/750 V AC.
NOTE For some types of flexible cables the term ‘cord’ is used.
Particular types of cables are specified in IEC 60245-3, IEC 60245-4, IEC 60245-6,
IEC 60245-7, IEC 60245-8. The code designations of these types of cables are provided in
Annex A of this document.
The test methods specified in Part 1 to Part 8 of the IEC 60245 series are given in IEC 60245-
2, IEC 60332-1 IEC 63294 and in the relevant parts of IEC 60811.
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 60173:1964, Colours of the cores of flexible cables and cords
IEC 60228:1978, Conductors of insulated cables
IEC 60245-2:1994, Rubber insulated cables – Rated voltages up to and including 450/750 V –
Part 2: Test methods
IEC 60245-3:1994, Rubber insulated cables - Rated voltages up to and including 450/750 V -
Part 3: Heat resistant silicone insulated cables
IEC 60245-4:1994, Rubber insulated cables - Rated voltages up to and including 450/750 V -
Part 4: Cords and flexible cables
IEC 60245-6, Rubber insulated cables - Rated voltages up to and including 450/750 V - Part 6:
Arc welding electrode cables
IEC 60245-7:1994, Rubber insulated cables - Rated voltages up to and including 450/750 V -
Part 7: Heat resistant ethylene-vinyl-acetate rubber insulated cables
IEC 60245-8, Rubber insulated cables - Rated voltages up to and including 450/750 V - Part 8:
Cords for applications requiring high flexibility
IEC 60332-1:1993, Tests on electric cables under fire conditions – Part 1: Test on a single
vertical insulated wire or cable
IEC 60811-1-1:1993, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section 1: Measurement of thickness and
overall dimensions – Tests for determining the mechanical properties
IEC 60811-1-2:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section Two: Thermal ageing methods
IEC 60811-1-4:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 1: Methods for general application – Section Four: Tests at low temperature
IEC 60811-2-1:1998, Insulating and sheathing materials of electric and optical cables –
Common test methods – Part 2-1: Methods specific to elastomeric compounds – Ozone
resistance, hot set andmineral oil immersion tests
IEC 60811-3-1:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 3: Methods specific to PVC compounds – Section One: Pressure test at high
temperature – Tests for resistance to cracking
IEC 60811-401, Electric and optical fibre cables - Test methods for non-metallic materials -
Part 401: Miscellaneous tests - Thermal ageing methods - Ageing in an air oven
IEC 60811-403, Electric and optical fibre cables - Test methods for non-metallic materials -
Miscellaneous tests - Ozone resistance test on cross-linked compounds
IEC 60811-404, Electric and optical fibre cables - Test methods for non-metallic materials -
Miscellaneous tests - Mineral oil immersion tests for sheaths
IEC 60811-412, Electric and optical fibre cables - Test methods for non-metallic materials -
Part 412: Miscellaneous tests - Thermal ageing methods - Ageing in an air bomb
IEC 60811-501, Electric and optical fibre cables - Test methods for non-metallic materials -
Mechanical tests - Tests for determining the mechanical properties of insulating and sheathing
compounds
IEC 60811-504, Electric and optical fibre cables - Test methods for non-metallic materials -
Mechanical tests - Bending tests at low temperature for insulation and sheaths
IEC 60811-505, Electric and optical fibre cables - Test methods for non-metallic materials -
Mechanical tests - Elongation at low temperature for insulations and sheaths
IEC 60811-507, Electric and optical fibre cables - Test methods for non-metallic materials -
Mechanical tests - Hot set test for cross-linked materials
IEC 60811-508, Electric and optical fibre cables - Test methods for non-metallic materials -
Mechanical tests - Pressure test at high temperature for insulation and sheaths
IEC 62440, Electric cables - Guide to use for cables with a rated voltage not exceeding
450/750V
IEC 63294:2021, Test methods for electric cables with rated voltage up to and including
450/750 V
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
– IEC Electropedia: available at https://www.electropedia.org/
___________
In preparation.
– ISO Online browsing platform: available at https://www.iso.org/obp
2.1 Definitions relating to insulating and sheathing materials
3.1
type of compound
category in which a compound is placed according to its properties, as determined by specific
tests
Note 1 to entry: The type designation is not directly related to the composition of the compound.
3.2
rubber compound
combination of materials suitably selected, proportioned, treated and vulcanized, of which the
characteristic constituent is a rubber or synthetic elastomer, or both
Note 1 to entry: Vulcanization is defined as a post-application treatment taking place after the insulation or sheath,
or both has been applied in order to induce permanent cross-linking of the elastomer.
3.3
polychloroprene compound
(PCP) or other equivalent synthetic elastomer
vulcanized cross-linked compound in which the elastomer is the polychloroprene or other
equivalent synthetic elastomer providing a compound with properties similar to PCP
3.4
ethylene-vinyl acetate rubber compound
(EVA ) or other equivalent synthetic elastomer
cross-linked compound in which the elastomer is ethylene-vinyl acetate or other equivalent
synthetic elastomer providing a compound with properties similar to EVA
3.5
ethylene-propylene rubber compound
(EPR) or equivalent synthetic elastomer
cross-linked compound in which the elastomer is ethylene-propylene or equivalent synthetic
elastomer providing a compound with properties similar to EPR
2.1.6
cross-linked polyvinyl chloride (XLPVC)
combinations of materials of which polyvinyl chloride is the characteristic constituent, including
adequate cross-linking agents, suitably selected, proportioned and treated which, when cross-
linked, meet the requirements given in the particular specification
2.2 Definitions relating to the tests
2.2.1
type tests
T
tests required to be made before supplying a type of cable covered by this standard on a general
commercial basis, in order to demonstrate satisfactory performance characteristics to meet the
intended application
NOTE These tests are of such a nature that, after they have been made, they need not be repeated, unless changes
have been made in the cable materials or design which might change the performance characteristics.
2.2.2
sample tests
S
tests made on samples of completed cable, or components taken from a completed cable,
adequate to verify that the finished product meets the design specifications
3.6
rated voltage
reference voltage for which the cable is designed, and which serves to define the electrical tests
Note 1 to entry: The rated voltage is expressed by the combination of two values U /U expressed in volts:
o
U being the RMS value between any insulated conductor and "earth" (metal covering of the cable or the
o
surrounding medium)
U being the RMS value between any two phase conductors of a multicore cable or of a system of single-core
cables
In an alternating-current system, the rated voltage of a cable is at least equal to the nominal voltage of the system
for which it is intended.
This condition applies both to the value U and to the value U.
o
In a direct current system, the nominal voltage of the system is not higher than 1,5 times the rated voltage AC value
of the cable U .
o
Note 2 to entry: The operating voltage of a system may can permanently exceed the nominal voltage of such a
system by 10 %. A cable can be used at a 10 % higher operating voltage than its rated voltage if the latter is at least
equal to the nominal voltage of the system.
4 Marking
4.1 Indication of origin and cable identification
4.1.1 General
Cables shall be provided with an indication of the manufacturer, which shall be either an
identification thread or a repetitive marking of the manufacturer's name or trademark.
Cables for use at a conductor temperature exceeding 70 °C shall also be marked either with
the code designation according to Annex A or with the maximum conductor temperature.
Marking may can be by printing or by reproduction in relief on, or in, the insulation or sheath,
or by printing on a proofed tape or a separate marker tape.
4.1.2 Continuity of marks
Each specified mark shall be regarded as continuous if the distance between the end of the
mark and the beginning of the next identical mark does not exceed
– 550 mm if the marking is on the outer sheath of the cable,
– 275 mm if the marking is
• on the insulation of an unsheathed cable,
• on the insulation of a sheathed cable,
• on a tape within a sheathed cable.
4.2 Durability
Printed markings shall be durable. Compliance with this requirement shall be checked by the
test given in 1.8 of IEC 60245-2 IEC 63294:2021, 6.1.
4.3 Legibility
All markings shall be legible.
The colours of the identification threads shall be easy to recognize or easily made recognizable,
if necessary, by cleaning with petrol or other suitable solvent.
5 Core identification
5.1 General
Each core shall be identified:
– in cables having up to and including five cores, by colour; see 4.1;
– in cables having more than five cores by colour or by number; see 4.1 and 4.2.
– by a colour for cables with five cores or less (see 5.2);
– by a colour and number for cables with more than five cores (see 5.2 and 5.3).
NOTE The colour scheme is under consideration.
5.2 Core identification by colours
5.2.1 General requirements
Identification of the cores of a cable shall be achieved by the use of coloured insulation or other
suitable method.
Cable cores shall be identified using coloured insulation or any other suitable method allowing
their identification.
Each core of a cable shall have only one colour, except the core identified by the colour
combination green and yellow.
Colours green and yellow, when not combined, shall not be used for individually in any multicore
cable.
NOTE Colours red and white should preferably be avoided.
5.2.2 Colour scheme
The preferred colour scheme is should be as follows:
– single-core cable: no preferred colour scheme specific recommendation;
– two-core cable: no preferred colour scheme specific recommendation;
– three-core cable: either green-and-yellow, blue, brown, or brown, black, grey;
– four-core cable: either green-and-yellow, brown, black, grey, or blue, brown, black, grey;
– five-core cable: either green-and-yellow, blue, brown, black, grey, or blue, brown, black,
grey, black;
– cables having more than five cores:
either in the outer layer one core green-and-yellow, one core blue, and the other cores of
one and the same colour, however not green, yellow, blue or brown; in the other layers one
core brown and the other cores of one and the same colour, however not green, yellow, blue
or brown;
or in the outer layer one core blue, one core brown and the other cores of one and the same
colour, however not green, yellow, blue or brown; in the other layers one core brown and
the other cores of one and the same colour, however not green, yellow, blue or brown.
The colours shall be clearly identifiable and durable. Durability shall be checked by the test
given in 1.8 of IEC 60245-2 IEC 63294:2021, 6.1.
5.2.3 Colour combination green-and-yellow
The distribution of the colours for the core coloured green-and-yellow shall comply with the
following condition (which is in accordance with IEC 60173): for every 15 mm length of core,
either one of the colours green and yellow shall cover at least 30 % and not more than 70 % of
the surface of the core, the other colour covering the remainder.
NOTE Information on the use of the colours green-and-yellow and blue.
It is understood that the colours green-and-yellow, when they are combined as specified above, are recognized
exclusively as a means of identification of the core intended for use as earth connection or similar protection, and
that the colour blue is intended for the identification of the core intended to be connected to neutral. If, however,
there is no neutral, blue can be used to identify any core except the earthing or protective conductor.
5.3 Core identification by numbers
5.3.1 General requirements
The insulation of the all cores shall be of the same colour and numbered sequentially, except
for the core coloured green-and-yellow, if one is included any.
The green-and-yellow core, if any, shall comply with the requirement of 5.2.3 and shall be in
the outer layer.
The numbering shall start with number “1” in the inner layer.
The numbers shall be printed in Arabic numerals on the outer surfaces of the cores. All the
numbers shall be of the same colour, which shall contrast with the colour of the insulation. The
numerals shall be legible.
5.3.2 Preferred arrangement of Requirements for marking arrangements
The numbers shall be repeated at regular intervals along the core, consecutive numbers being
inverted in relation to each other.
When the number is a single numeral, a dash shall be placed underneath it. If the number
consists of two numerals, these shall be positioned one below the other, and a dash placed
below the lower numeral. The spacing d between consecutive numbers shall not exceed 50 mm.
The arrangement of the marks is shown in Figure 1.

Figure 1 – Arrangement of marking by numbers
5.3.3 Durability
Printed numerals shall be durable. Compliance with this requirement shall be checked by the
test given in 1.8 of IEC 60245-2 IEC 63294:2021, 6.1.
6 General requirements for the construction of cables
6.1 Conductors
6.1.1 Material
The conductors shall consist of annealed copper. Unless otherwise specified in the particular
standards IEC 60245-3, IEC 60245-4, IEC 60245-6, IEC 60245-7, and IEC 60245-8, the wires
of conductors may can be plain or tinned. Tinned wires shall be covered with an effective a
layer of tin.
6.1.2 Construction
The maximum diameters of the wires of the conductors shall be in accordance with IEC 60228,
unless otherwise specified in the particular cable specifications standards IEC 60245-3,
IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60245-8.
The classes of conductors relevant to the various types of cables are given in the particular
standards IEC 60245-3, IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60227-8.
6.1.3 Separator between conductor and insulation
An optional separating tape made of suitable material may can be placed between the plain or
tinned conductor and the insulation.
6.1.4 Construction verification Check on construction
Compliance with the requirements of 6.1.1 and 6.1.2, including the requirements of IEC 60228,
shall be checked by inspection and by measurement in accordance with IEC 60228, IEC 60245-
3, IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60245-8.
6.1.5 Electrical resistance
Unless otherwise specified in the particular standards IEC 60245-3, IEC 60245-4, IEC 60245-6,
IEC 60245-7 and IEC 60245-8, the resistance of each conductor at 20 °C shall be in accordance
with the requirements of IEC 60228 for the given class of conductor.
Compliance shall be checked by the test given in 2.1 of IEC 60245-2 IEC 63294:2021, 5.1.
6.2 Insulation
6.2.1 Material
The insulation shall be a cross-linked material of the type specified for each type of cable in the
particular standards IEC 60245-3, IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60245-8.
– Type IE2 in the case of cables insulated with silicone rubber compound.
– Type IE3 in the case of cables insulated with rubber compound based on ethylene-vinyl
acetate rubber compound or equivalent materials.
– Type IE4 in the case of cables insulated with ordinary ethylene-propylene rubber compound
or equivalent materials.
The test requirements for these compounds are specified in Table 1.
NOTE For some cables belonging to IEC 60245-8, insulation type XP1 is given in that particular standard.
The maximum operating temperatures for cables insulated with any of the above types of
compound and covered by the particular standards IEC 60245-3, IEC 60245-4, IEC 60245-6,
IEC 60245-7 and IEC 60245-8 are given in those standards.
6.2.2 Application to the conductor
The insulation shall be closely applied to the conductor or separator. In the particular standards
IEC 60245-3, IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60245-8, it is stated, for each
type of cable, whether the insulation shall be applied in a single layer or in a number of layers,
and whether it shall or shall not be covered with a proofed tape. It shall be possible to remove
the insulation, without damage to the insulation itself, to the conductor, or to the tin or metal
coating if any.
Compliance shall be checked by inspection and by manual test performing the tests using the
test methods specified in particular standards IEC 60245-3, IEC 60245-4, IEC 60245-6,
IEC 60245-7, IEC 60245-8 and in Table 1 of this document.
6.2.3 Thickness
The mean value of the insulation thickness shall be not less than the specified value for each
type and size of cable shown in the tables of the particular standards IEC 60245-3,
IEC 60245-4, IEC 60245-6, IEC 60245-7 and IEC 60245-8.
However, the thickness at any one place point may be less than the specified value, provided
that the difference does not exceed 0,1 mm + 10 % of the specified value.
Compliance shall be checked by the test given in 1.9 of IEC 60245-2 IEC 63294:2021, 6.2.
6.2.4 Mechanical properties before and after ageing
The insulation shall have adequate mechanical strength and elasticity as defined in Table 1
within the temperature limits to which it may can be exposed in normal use.
Compliance shall be checked by carrying out the tests specified in Table 1.
The applicable test methods and the results to be obtained are required results shall be as
specified in Table 1.
Table 1 – Requirements for non-electrical tests for cross-linked rubber insulation
1 2 3 4 5 6 7
Test method
Type of compound
Ref.
described in
Test Unit
No.
IE 2 IE 3 IE 4 IEC Subclause
1 Tensile strength and elongation   60811-1-1 9.1
at break
1.1 Properties in the state as
delivered
1.1.1 Values to be obtained for the
tensile strength:
- median, min. N/mm 5,0 6,5 5,0
1.1.2 Values to be obtained for the
elongation at break:
- median, min. % 150 200 200
1.2 Properties after ageing in air   60811-1-1 9.1
oven
and
60811-1-2 8.1
a, b
1.2.1 Ageing conditions :
- temperature °C 200 ± 2 150 ± 2 100 ± 2
- duration of treatment h
10 × 24 7 × 24 7 × 24
1.2.2 Values to be obtained for the
tensile strength:
- median, min. N/mm 4,0 - 4,2
c
% - ± 30 ± 25
- variation , max.
1.2.3 Values to be obtained for the
elongation-at-break:
- median, min. % 120 - 200
c
% - ± 30 ± 25
- variation , max.
1.3 Spare
1.4 Properties after ageing in an air   60811-1-2 8.2
bomb
a
1.4.1
Ageing conditions :
- temperature °C - 150 ± 3 127 ± 2
- duration of treatment h - 7 × 24 40
1.4.2 Values to be obtained for
the tensile strength:
- median, min. N/mm - 6,0 -
c
% - -
- variation , max. ±30
1.4.3 Values to be obtained for
the elongation-at-break:
c d
% - ±30
- variation , max. –30
2 Hot set test   60811-2-1 Clause 9
2.1 Test conditions:
- temperature °C 200 ± 3 200 ± 3 200 ± 3
- time under load min 15 15 15
- mechanical stress N/mm 0,20 0,20 0,20

2.2 Values to be obtained:
- elongation under load, max. % 175 100 100
- elongation after cooling, max. % 25 25 25
3 Pressure test at high  See IEC
60811-3-1 Clause 8
temperature 60811-3-1
3.1 Test conditions:
- force exercised by the blade - 8.1.4 -
- duration of heating under load - 8.1.5 -
- temperature °C - 150 ± 2 -
3.2 Result to be obtained:
- median of the depth of % - 50 -
penetration, max.
4 Ozone resistance test   60811-2-1 Clause 8
4.1 Test conditions
- test temperature °C - -
25 ± 2
- test duration h - - 24
- ozone concentration % - - 0,025 to
0,030
4.2 Result to be obtained  No cracks
a
Ageing of Type IE 4 shall be carried out with the conductor in place, or with not more than 30 % of the conductor strands
removed.
b
Unless otherwise specified in the relevant cable specifications, a rotating fan inside the oven is normally permissible when testing rubber

compounds. However, in case of dispute, ageing shall be carried out in an oven which is designed to operate without a fan rotating inside it.
c
Variation: Difference between the median value after ageing and the median value without ageing, expressed as a percentage
of the latter.
d
No limit for the positive tolerance.

Ref. Tests Units Requirements Test methods
No.
Types of compound
IE2 IE3 IE4
1 Tensile strength and
elongation at break
1.1 Properties in the state as   IEC 60811-501
delivered
1.1.1 Tensile strength, median, 5,0 6,5 5,0
N/mm
min.
1.1.2 Elongation at break, median, % 150 200 200
min.
1.2 Properties after ageing in air   IEC 60811-401 and
oven IEC 60811-501
a, b:
1.2.1
Ageing conditions
− temperature °C 200 ± 2 150 ± 2 100 ± 2
− duration of treatment h 10 × 24 7 × 24 7 × 24
1.2.2 Tensile strength:
− median, min. 4,0 - 4,2
N/mm
c
% - ± 30 ± 25
− variation , max.
1.2.3 Elongation-at-break:
% 120 - 200
− median, min.
c
% - ± 30 ± 25
− variation , max.
1.3 Spare
1.4 Properties after ageing in an   IEC 60811-412
air bomb
a:
1.4.1
Ageing conditions
°C - 150 ± 3 127 ± 2
− temperature
− duration of treatment h - 7 × 24 40
1.4.2 Tensile strength:
− median, min. - 6,0 -
N/mm
c
% - - ± 30
− variation , max.
1.4.3 Elongation-at-break:
c d
% - ± 30
− variation , max. –30
2 Hot set test   IEC 60811-507
2.1 Test conditions:
Ref.
Tests Units Requirements Test methods
No.
Types of compound
IE2 IE3 IE4
− temperature °C 200 ± 3 200 ± 3 200 ± 3
min 15 15 15
− time under load
0,20 0,20 0,20
− mechanical stress N/mm
2.2 Elongation at break:
− elongation under load, % 175 100 100
max.
− elongation after cooling, % 25 25 25
max.
3 Pressure test at high
IEC 60811-508
temperature
3.1 Test conditions:
− force exercised by the - Annex A -
blade
− duration of heating - 4h for -
sample D
under load
≤ 15 mm;
6h for
sample D
> 15 mm
(D =
outer
diameter)
°C - 150 ± 2 -
− temperature
3.2 Depth of penetration
% - 50 -
− median; max.
4 Ozone resistance test   IEC 60811-403
4.1 Test conditions
°C - - 25 ± 2
− test temperature
h - - 24
− test duration
% - - 0,025 to
− ozone concentration
0,030
4.2 Result that shall be obtained  No
cracks
a
Ageing of Type IE4 shall be carried out with the conductor in place, or with not more than 30 % of the conductor
strands removed.
b
Unless otherwise specified in the relevant cable standards, a rotating fan may be used inside the oven when
testing the rubber compounds. However, in case of dispute, ageing shall be carried out in an oven which is
designed to operate without a fan rotating inside it.
c
Variation: difference between the median value after ageing and the median value without ageing, expressed
as a percentage of the latter.
d
No limit for the positive tolerance.

6.3 Filler
6.3.1 Material
The fillers shall be composed of one of the following or of any combination of the following
unless otherwise specified in the particular standards (see IEC 60245-3, IEC 60245-4,
IEC 60245-6, IEC 60245-7 and IEC 60245-8):
– a compound based on cross-linked or uncross-linked rubber, or
– natural or synthetic textiles, or
– paper.
There shall be no harmful interactions between the constituents of the filler and the insulation
or the sheath, or both.
6.3.2 Application
For each type of cable, the particular standards (see IEC 60245-3, IEC 60245-4, IEC 60245-6,
IEC 60245-7 and IEC 60245-8), specify whether the cable includes fillers or whether the sheath
may penetrate between the cores thus forming a filling (see 6.5.2).
The fillers shall fill the spaces between the cores, giving the assembly a practically circular
shape. The fillers shall be capable of being removed without damage to the cores. It shall be
possible to remove the fillers without damaging the cores. The assembly of cores and fillers
may be held together by a film or tape.
6.4 Textile braid
6.4.1 Material
The yarns threads forming the textile braid shall be of the material required for each type of
cable by the particular standards (see IEC 60245-3, IEC 60245-4, IEC 60245-6, IEC 60245-7
and IEC 60245-8).
Where textile braid is specified in the particular standards (see IEC 60245-3, IEC 60245-4,
IEC 60245-6, IEC 60245-7 and IEC 60245-8), the yarns may be threads are based on natural
material (cotton, treated cotton, silk) or on synthetic material (rayon, polyamide, etc.) or again
may can consist of filaments made of glass fibre or equivalent material.
6.4.2 Application
The braid shall have a uniform texture, without knots or gaps. Braids made of glass-fibre
filaments shall be treated with a suitable substance to prevent fraying.
6.5 Sheath
6.5.1 Material
The sheath shall be a cross-linked rubber compound of the type specified for each type of cable
...