IEC 60227-7:2024

IEC 60227-7 ®
Edition 2.0 2024-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V –
Part 7: Flexible cables screened and unscreened with two or more conductors
and of rated voltages up to and including 300/500 V
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IEC 60227-7 ®
Edition 2.0 2024-02
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V –
Part 7: Flexible cables screened and unscreened with two or more conductors
and of rated voltages up to and including 300/500 V
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.060.20  ISBN 978-2-8322-8371-4
– 2 – IEC 60227-7:2024 RLV © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 2
1 General .
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 8
4 Oil resistant, polyvinyl chloride sheathed, screened and unscreened flexible cable . 8
4.1 Code designation . 8
4.2 Rated voltage . 8
4.3 Construction . 8
4.3.1 Conductors . 8
4.3.2 Insulation . 9
4.3.3 Assembly of cores and fillers, if any . 9
4.3.4 Inner sheath for screened cables . 9
4.3.5 Screen . 9
4.3.6 Sheath or oversheath . 10
4.3.7 Core identification . 10
4.3.8 Overall diameter . 10
4.4 Tests . 11
4.4.1 General . 11
4.4.2 Flexing test . 11
4.5 Guidance on use . 11
Annex A (normative) Code designation .
Bibliography . 17

Table 1 – Mass of weight and diameter of pulleys . 11
Table 2 – General data for type 60227 IEC 74 . 13
Table 3 – General data for type 60227 IEC 75 . 14
Table 4 – Tests for types 60227 IEC 74 and 60227 IEC 75 . 15

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POLYVINYL CHLORIDE INSULATED CABLES
OF RATED VOLTAGES UP TO AND INCLUDING 450/750 V –

Part 7: Flexible cables screened and unscreened with two or more
conductors and of rated voltages up to and including 300/500 V

FOREWORD
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
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This redline version of the official IEC Standard allows the user to identify the changes
made to the previous edition IEC 60227-7:1995+AMD1:2003+AMD2:2011 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.

– 4 – IEC 60227-7:2024 RLV © IEC 2024
IEC 60227-7 has been prepared by IEC technical committee 20: Electric cables. It is an
International Standard.
This second edition cancels and replaces the first edition published in 1995, Amendment 1:2003
and Amendment 2:2011. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) the reference to tests according to IEC 60227-2 has been withdrawn and replaced with a
reference to IEC 63294;
b) normative references have been updated.
The text of this International Standard is based on the following documents:
Draft Report on voting
20/2144/FDIS 20/2157/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 parts in the IEC 60227 series, published under the general title Polyvinyl chloride
insulated cables of rated voltages up to and including 450/750 V can be found on the IEC
website.
This document is to be used in conjunction with IEC 60227-1.
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.
IMPORTANT – The "colour inside" logo on the cover page of this document indicates
that it contains colours which are considered to be useful for the correct understanding
of its contents. Users should therefore print this document using a colour printer.

INTRODUCTION
The IEC 60227 series, published under the general title Polyvinyl chloride insulated cables of
rated voltages up to and including 450/750 V, consists of the following parts:
IEC 60227-1: General requirements;
IEC 60227-2: Test methods (withdrawn and replaced by IEC 63294);
IEC 60227-3: Non-sheathed cables for fixed wiring;
IEC 60227-4: Sheathed cables for fixed wiring;
IEC 60227-5: Flexible cables (cords);
IEC 60227-6: Lift cables and cables for flexible connections;
IEC 60227-7: Flexible cables screened and unscreened with two or more conductors and of
rated voltages up to and including 300/500 V.
This part of IEC 60227, when used in conjunction with IEC 60227-1, forms the complete
standard for flexible cables screened and unscreened with two or more conductors and of rated
voltages up to and including 300/500 V only.

– 6 – IEC 60227-7:2024 RLV © IEC 2024
POLYVINYL CHLORIDE INSULATED CABLES
OF RATED VOLTAGES UP TO AND INCLUDING 450/750 V –

Part 7: Flexible cables screened and unscreened with two or more
conductors and of rated voltages up to and including 300/500 V

1 General
1 Scope
This part of IEC 60227 details the particular specifications for polyvinyl chloride insulated,
screened and unscreened control cables of rated voltages up to and including 300/500 V.
All cables comply with the appropriate requirements given in IEC 60227-1 and each individual
type of cable complies with the particular requirements of this part.
This document provides the particular requirements for screened and unscreened control
cables of rated voltages up to and including 300/500 V, which apply in addition to the
appropriate requirements specified in IEC 60227-1, which apply to all cables. The tests for
cables specified in the IEC 60227 series are described in IEC 63294.
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.
NOTE The IEC 60811 series is currently undergoing a revision, which will lead to a restructuring of its parts.
A description of this, as well as a cross-reference table between the current and planned parts is given in IEC 60811-
100.
IEC 60227-1:2007, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 1: General requirements
IEC 60227-2:1997, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 2: Test methods
Amendment 1 (2003)
IEC 60228, Conductors of insulated cables
IEC 60332-1-2, Tests on electric and optical fibre cables under fire conditions – Part 1-2: Test
for vertical flame propagation for a single insulated wire or cable – Procedure for 1 kW
pre-mixed flame
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 60811-404, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 404: Miscellaneous tests – Mineral oil immersion tests for sheaths
IEC 60811-409, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 409: Miscellaneous tests – Loss of mass test for thermoplastic insulations and sheaths

IEC 60811-501, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 501: 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 –
Part 504: 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 –
Part 505: Mechanical tests – Elongation at low temperature for insulations and sheaths
IEC 60811-506, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 506: Mechanical tests – Impact test at low temperature for insulations and sheaths
IEC 60811-508, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 508: Mechanical tests – Pressure test at high temperature for insulation and sheaths
IEC 60811-509, Electric and optical fibre cables – Test methods for non-metallic materials –
Part 509: Mechanical tests – Test for resistance of insulations and sheaths to cracking (heat
shock test)
IEC 60502-1:20042021, Power cables with extruded insulation and their accessories for rated
voltages from 1 kV (U = 1,2 kV) up to 30 kV (U = 36 kV) – Part 1: Cables for rated voltages
m m
= 1,2 kV) and 3 kV (U = 3,6 kV)
of 1 kV (U
m m
Amendment 1 (2009)
IEC 60719:1992, 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
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
Amendment 1 (2001)
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
Amendment 1 (1989)
Amendment 2 (2000)
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
Amendment 1 (1993)
Amendment 2 (2001)
IEC 60811-2-1:1998, Common test methods for insulating and sheathing materials of electric
and optical cables – Part 2-1: Methods specific to elastomeric compounds – Ozone resistance,
hot set and mineral oil immersion tests
Amendment 1 (2001)
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
Amendment 1 (1994)
Amendment 2 (2001)
IEC 60811-3-2:1985, Common test methods for insulating and sheathing materials of electric
cables – Part 3: Methods specific to PVC compounds – Section Two: Loss of mass test –
Thermal stability test
– 8 – IEC 60227-7:2024 RLV © IEC 2024
Amendment 1 (1993)
Amendment 2 (2003)
IEC 62153-4-3:20062013, Metallic communication cable test methods – Part 4-3:
Electromagnetic compatibility (EMC) – Surface transfer impedance – Triaxial method
IEC 63294:2021, Test methods for electric cables with rated voltages up to and including
450/750 V
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60227-1 and the
following apply.
ISO and IEC maintain terminology databases for use in standardization at the following
addresses:
• IEC Electropedia: available at https://www.electropedia.org/
• ISO Online browsing platform: available at https://www.iso.org/obp
3.1
type test
test made before supplying a type of cable covered by this document on a general commercial
basis in order to demonstrate satisfactory performance characteristics to meet the intended
application
Note 1 to entry: Type tests are of such a nature that, after they have been made, it is not necessary for them to be
repeated, unless changes are made in the cable materials or design which can change the performance
characteristics.
Note 2 to entry: The symbol T is used to refer to type tests.
3.2
sample test
test made on samples of completed cable or components taken from a completed cable to verify
that the finished product meets the design standards
Note 1 to entry: The symbol S is used to refer to sample tests.
4 Oil resistant, polyvinyl chloride sheathed, screened and unscreened
flexible cable
4.1 Code designation
60227 IEC 74 for screened cables;
60227 IEC 75 for unscreened cables.
4.2 Rated voltage
300/500 V.
4.3 Construction
4.3.1 Conductors
Number of conductors: 2 to 60.
Preferred number of conductors: 2, 3, 4, 5, 6, 7, 12, 18, 27, 36, 48 and 60.
The conductors shall comply with the requirements given in IEC 60228 for class 5 conductors.

4.3.2 Insulation
The insulation shall be polyvinyl chloride compound of type PVC/D (see IEC 60227-1) applied
around each conductor.
The specified value of the insulation thickness shall comply with the specified value is given in
Table 2, column 2 and Table 3, column 2. The insulation resistance shall be not less that the
value given in Table 2, column 8 or Table 3, column 6.
4.3.3 Assembly of cores and fillers, if any
The cores shall be twisted together, where appropriate in several concentric layers.
A centre core is not permitted but a centre filler of suitable material shall be applied for cables
with five or more cores in the first layer. Assemblies with three or more cores shall have one
core which is coloured green-and-yellow.
Around each layer a tape may be applied which may can cover the cores fully or partially. The
tape shall not adhere to the cores.
For two-core cables, the space between the cores shall be filled either by separate fillers or by
the sheath filling the interstices.
4.3.4 Inner sheath for screened cables
The inner sheath shall be a polyvinyl chloride compound of type PVC/ST5 (see IEC 60227-1)
applied around the core assembly. For all cables, the thickness of the inner sheath shall be
determined by the formula:
t = 0,02 D + 0,6 mm,
is f
where D is the fictitious diameter over the laid-up core, calculated in accordance with A.2.1,
f
A.2.2 and A.2.3 of IEC 60502, annex A IEC 60502-1:2021, A.3.1, A.3.2 and A.3.3, and where
2 2 2
the fictitious diameter (d ) of 0,5 mm , 0,75 mm and 1,0 mm conductors (not given in A.2.1
l
IEC 60502-1:2021, A.3.1) shall be taken to be 0,8 mm, 1,0 mm and 1,1 mm, respectively.
For cables with the preferred number of cores, the calculated values of the inner sheath
thickness are given in Table 2, column 3.
NOTE In the case of cables comprising 10 or more cores, the values specified apply to a core assembly in two or
more layers.
The mean value of the thickness of the sheath shall be not less that the calculated value.
However, the thickness at any place point may be less than the calculated value provided that
the difference does not exceed 0,1 mm + 15 % of the calculated value.
The inner sheath may fill the interstices of the laid-up core assembly, but it shall not adhere to
the cores.
4.3.5 Screen
For screened cables, the screen shall be applied over the inner sheath, in the form of a braid
of plain or tinned copper wires.
For cables with the preferred number of cores, the diameter of the copper wires shall comply
with the values given in Table 2, column 4.

– 10 – IEC 60227-7:2024 RLV © IEC 2024
For the other cables, the following maximum values apply:
– 0,16 mm for d ≤ 10,0 mm
– 0,21 mm for 10,0 mm < d ≤ 20,0 mm
– 0,26 mm for 20,0 mm < d ≤ 30,0 mm
– 0,31 mm for d > 30,0 mm
where d is the fictitious diameter under the braid which is calculated by adding to the fictitious
diameter over laid-up cores, twice the specified thickness of inner sheath.
The screening efficiency shall be determined by measuring the transfer impedance. The value
obtained shall not exceed 250 Ω/km at 30 MHz.
4.3.6 Sheath or oversheath
The sheath or oversheath shall be polyvinyl chloride compound of type PVC/ST9
(see IEC 60227-1) applied either:
– as an oversheath around the screen of screened cables, or
– as a sheath around the laid-up cores of unscreened cables.
An optional tape may be applied between the screen and oversheath.
For all cables the thickness or the sheath or oversheath shall be determined by the formula:
t = 0,08 d + 0,4 mm
s L
with a maximum value of 2,4 mm, where d is the fictitious diameter over the screen of the
L
screened cables or over the laid-up core assembly of unscreened cables.
The fictitious diameter shall be calculated in accordance with IEC 60502-1:2021, Annex A and
4.3.4 of this document. The increase in diameter due to the braided screen is four times the
diameter of the braiding wire specified in Table 2, column 4.
For cables with the preferred number of cores, the calculated specified values of the sheath and
over-sheath thickness are given in Table 2, column 5 and in Table 3, column 3 (see note in
4.3.4). Both for sheath and oversheath, the thickness requirements apply as specified in
IEC 60227-1.
In unscreened cables, the sheath may fill the interstices of the laid-up core assembly, but it
shall not adhere to the cores. In screened cables, the oversheath shall fit closely but not adhere
to the screen.
All cables shall have practically a circular cross-section.
4.3.7 Core identification
Except for the green-and-yellow core, if any, all cores shall be identified by numbers in
accordance with IEC 60227-1.
4.3.8 Overall diameter
The mean overall diameter of the cables shall be within the limits to be determined in
accordance with IEC 60719. For cables with the preferred number of cores, the limits, according
to IEC 60719 are given in Table 2, columns 6 and 7 or in Table 3, columns 4 and 5, (see note
in 4.3.4).
4.4 Tests
4.4.1 General
Compliance with the requirements of 4.3 shall be checked by inspection and by the sample
tests and type tests given in Table 4.
4.4.2 Flexing test
4.4.2.1 General
The requirements are given in IEC 60227-1.
4.4.2.2 Sample preparation
The mass of the weight and the diameter of pulleys A and B are given in Table 1.
Table 1 – Mass of weight and diameter of pulleys
b
Nominal cross- Mass of weight Diameter of
Number of cores
a
sectional area
pulleys
kg mm
mm
0,5 0,5 60
0,75 1,0 80
2 1 1,0 80
1,5 1,0 80
2,5 1,5 120
0,5 0,5 80
0,75 1,0 80
3 1 1,0 80
1,5 1,0 80
2,5 1,5 120
0,5 0,5 80
0,75 1,0 80
4 1 1,0 80
1,5 1,5 120
2,5 1,5 120
0,5 1,0 80
0,75 1,0 80
5 1 1,0 120
1,5 1,5 120
2,5 2,0 120
0,5 1,0 120
0,75 1,5 120
6 1 1,5 120
1,5 2,0 120
2,5 3,5 160
0,5 1,0 120
0,75 1,5 120
7 1 1,5 120
1,5 2,0 160
2,5 3,5 160
0,5 1,5 120
0,75 2,0 160
12 1 3,0 160
1,5 4,0 160
2,5 7,0 200
0,5 2,0 160
0,75 3,0 160
18 1 4,0 160
1,5 6,0 200
2,5 7,5 200
– 12 – IEC 60227-7:2024 RLV © IEC 2024
b
Nominal cross- Mass of weight Diameter of
Number of cores
a
sectional area
pulleys
kg mm
mm
a
Diameter measured at the lowest point of the groove.
b
Cables with a number of cores between 7 and 18, but not specified in this table,
are non-preferred cable types. They may be tested using the mass of weight and
the pulley diameter for the same conductor size at the next higher specified
number of cores.
4.4.2.3 Current loading of cores
During the flexing test, the cable sample shall be loaded as follows:
+10
– Two- and three-core cables: all cores to be loaded with 1 A/mm %;
+10
– Four- and five-core cables: three cores to be loaded with 1 A/mm % or all cores to
+10
be loaded with 3 n A/mm %, where n is the number
of cores.
Cables having more than five cores shall not be loaded. On all cores, a signal current shall be
applied.
4.5 Guidance on use
The main purpose of these cables is for the interconnection of parts of machines used for
manufacturing purposes, including machine tools and mechanical handling equipment. The
cables are permitted for the direct connection to the mains. Continual flexing is not
recommended for the screened cables. If any of these cables is not required to move during
use, installation in conduits, trunking, etc. is advised.
Screened cables are recommended in environments where a moderate level of electro-magnetic
interference is encountered.
These cables are designed for use only inside buildings and where the ambient temperatures
remain within the range of +5 °C to +40 °C.
The maximum rated conductor temperature in normal use is: 70 °C.
The maximum sheath temperature is: 60 °C.

Table 2 – General data for type 60227 IEC 74
1 2 3 4 5 6 7 8
Number Mean overall diameter
and nominal Insulation Inner sheath Maximum Oversheath Minimum
cross- thickness thickness diameter thickness insulation
sectional specified specified of the wires specified resistance
Lower limit Upper limit
area of value value of the screen value at 70 °C
conductors
mm mm mm mm mm mm
MΩ ⋅ km
mm
2 × 0,5 0,6 0,7 0,16 0,9 7,7  9,6 0,013
2 × 0,75 0,6 0,7 0,16 0,9 8,0 10,0 0,011
2 × 1 0,6 0,7 0,16 0,9 8,2 10,3 0,010
2 × 1,5 0,7 0,7 0,16 1,0 9,3 11,6 0,010
2 × 2,5 0,8 0,7 0,16 1,1 10,7 13,3 0,009
3 × 0,5 0,6 0,7 0,16 0,9 8,0 10,0 0,013
3 × 0,75 0,6 0,7 0,16 0,9 8,3 10,4 0,011
0,6 0,7 0,16 1,0 8,8 11,0 0,010
3 × 1
3 × 1,5 0,7 0,7 0,16 1,0 9,7 12,1 0,010
3 × 2,5 0,8 0,7 0,16 1,1 11,3 14,0 0,009
4 × 0,5 0,6 0,7 0,16 0,9 8,5 10,7 0,013
4 × 0,75 0,6 0,7 0,16 1,0 9,1 11,3 0,011
4 × 1 0,6 0,7 0,16 1,0 9,4 11,7 0,010
4 × 1,5 0,7 0,7 0,16 1,1 10,7 13,2 0,010
4 × 2,5 0,8 0,8 0,16 1,2 12,6 15,5 0,009
5 × 0,5 0,6 0,7 0,16 1,0 9,3 11,6 0,013
5 × 0,75 0,6 0,7 0,16 1,0 9,7 12,1 0,011
5 × 1 0,6 0,7 0,16 1,1 10,3 12,8 0,010
5 × 1,5 0,7 0,8 0,16 1,2 11,8 14,7 0,010
5 × 2,5 0,8 0,8 0,21 1,3 13,9 17,2 0,009
6 × 0,5 0,6 0,7 0,16 1,0 9,9 12,4 0,013
6 × 0,75 0,6 0,7 0,16 1,1 10,5 13,1 0,011
6 × 1 0,6 0,7 0,16 1,1 11,0 13,6 0,010
6 × 1,5 0,7 0,8 0,16 1,2 12,7 15,7 0,010
6 × 2,5 0,8 0,8 0,21 1,4 15,2 18,7 0,009
7 × 0,5 0,6 0,7 0,16 1,1 10,8 13,5 0,013
7 × 0,75 0,6 0,7 0,16 1,2 11,5 14,3 0,011
7 × 1 0,6 0,8 0,16 1,2 12,2 15,1 0,010
7 × 1,5 0,7 0,8 0,21 1,3 14,1 17,4 0,010
7 × 2,5 0,8 0,8 0,21 1,5 16,5 20,3 0,009
12 × 0,5 0,6 0,8 0,21 1,3 13,3 16,5 0,013
12 × 0,75 0,6 0,8 0,21 1,3 13,9 17,2 0,011
12 × 1 0,6 0,8 0,21 1,4 14,7 18,1 0,010
12 × 1,5 0,7 0,8 0,21 1,5 16,7 20,5 0,010
12 × 2,5 0,8 0,9 0,21 1,7 19,9 24,4 0,009
18 × 0,5 0,6 0,8 0,21 1,3 15,1 18,6 0,013
18 × 0,75 0,6 0,8 0,21 1,5 16,2 19,9 0,011
18 × 1 0,6 0,8 0,21 1,5 16,9 20,8 0,010
18 × 1,5 0,7 0,9 0,21 1,7 19,6 24,1 0,010
18 × 2,5 0,8 0,9 0,21 2,0 23,3 28,5 0,009
27 × 0,5 0,6 0,8 0,21 1,6 18,0 22,1 0,013
27 × 0,75 0,6 0,9 0,21 1,7 19,3 23,7 0,011
27 × 1 0,6 0,9 0,21 1,7 20,2 24,7 0,010
27 × 1,5 0,7 0,9 0,21 2,0 23,4 28,6 0,010
27 × 2,5 0,8 1,0 0,26 2,3 28,2 34,5 0,009
36 × 0,5 0,6 0,9 0,21 1,7 20,1 24,7 0,013
36 × 0,75 0,6 0,9 0,21 1,8 21,3 26,2 0,011
36 × 1 0,6 0,9 0,21 1,9 22,5 27,6 0,010
36 × 1,5 0,7 1,0 0,26 2,2 26,6 32,5 0,010
36 × 2,5 0,8 1,1 0,26 2,4 31,5 38,5 0,009
48 × 0,5 0,6 0,9 0,26 1,9 23,1 28,3 0,013
48 × 0,75 0,6 1,0 0,26 2,1 24,9 30,4 0,011
48 × 1 0,6 1,0 0,26 2,1 26,1 31,9 0,010
48 × 1,5 0,7 1,1 0,26 2,4 30,4 37,0 0,010
48 × 2,5 0,8 1,2 0,31 2,4 35,9 43,7 0,009
60 × 0,5 0,6 1,0 0,26 2,1 25,5 31,1 0,013
60 × 0,75 0,6 1,0 0,26 2,2 27,0 32,9 0,011
60 × 1 0,6 1,0 0,26 2,3 28,5 34,7 0,010
60 × 1,5 0,7 1,1 0,26 2,4 32,7 39,9 0,010
60 × 2,5 0,8 1,2 0,31 2,4 38,8 47,2 0,009

– 14 – IEC 60227-7:2024 RLV © IEC 2024
Table 3 – General data for type 60227 IEC 75
1 2 3 4 5 6
Number Mean overall diameter
Insulation Sheath Minimum
and nominal
thickness thickness insulation
cross-sectional
specified specified resistance
Lower limit Upper limit
area of
value value at 70 °C
conductors
mm mm mm mm MΩ ⋅ km
mm
2 × 0,5 0,6 0,7 5,2 6,6 0,013
2 × 0,75 0,6 0,8 5,7 7,2 0,011
2 × 1 0,6 0,8 5,9 7,5 0,010
2 × 1,5 0,7 0,8 6,8 8,6 0,010
2 × 2,5 0,8 0,9 8,2 10,3 0,009
3 × 0,5 0,6 0,7 5,5 7,0 0,013
3 × 0,75 0,6 0,8 6,0 7,6 0,011
3 × 1 0,6 0,8 6,3 8,0 0,010
3 × 1,5 0,7 0,9 7,4 9,4 0,010
3 × 2,5 0,8 1,0 9,0 11,2 0,009
4 × 0,5 0,6 0,8 6,2 7,9 0,013
4 × 0,75 0,6 0,8 6,6 8,3 0,011
4 × 1 0,6 0,8 6,9 8,7 0,010
4 × 1,5 0,7 0,9 8,2 10,2 0,010
4 × 2,5 0,8 1,1 10,1 12,5 0,009
5 × 0,5 0,6 0,8 6,8 8,6 0,013
5 × 0,75 0,6 0,9 7,4 9,3 0,011
5 × 1 0,6 0,9 7,8 9,8 0,010
5 × 1,5 0,7 1,0 9,1 11,4 0,010
5 × 2,5 0,8 1,1 11,0 13,7 0,009
6 × 0,5 0,6 0,9 7,6 9,6 0,013
6 × 0,75 0,6 0,9 8,1 10,1 0,011
6 × 1 0,6 1,0 8,7 10,8 0,010
6 × 1,5 0,7 1,1 10,2 12,6 0,010
6 × 2,5 0,8 1,2 12,2 15,1 0,009
7 × 0,5 0,6 0,9 8,3 10,4 0,013
7 × 0,75 0,6 1,0 9,0 11,3 0,011
7 × 1 0,6 1,0 9,5 11,8 0,010
7 × 1,5 0,7 1,2 11,3 14,1 0,010
7 × 2,5 0,8 1,3 13,6 16,8 0,009
12 × 0,5 0,6 1,1 10,4 12,9 0,013
12 × 0,75 0,6 1,1 11,0 13,7 0,011
12 × 1 0,6 1,2 11,8 14,6 0,010
12 × 1,5 0,7 1,3 13,8 17,0 0,010
12 × 2,5 0,8 1,5 16,8 20,6 0,009
18 × 0,5 0,6 1,2 12,3 15,3 0,013
18 × 0,75 0,6 1,3 13,2 16,4 0,011
18 × 1 0,6 1,3 14,0 17,2 0,010
18 × 1,5 0,7 1,5 16,5 20,3 0,010
18 × 2,5 0,8 1,8 20,2 24,8 0,009
27 × 0,5 0,6 1,4 15,1 18,6 0,013
27 × 0,75 0,6 1,5 16,2 19,9 0,011
27 × 1 0,6 1,5 17,0 21,0 0,010
27 × 1,5 0,7 1,8 20,3 24,9 0,010
27 × 2,5 0,8 2,1 24,7 30,2 0,009
36 × 0,5 0,6 1,5 17,0 20,9 0,013
36 × 0,75 0,6 1,6 18,2 22,4 0,011
36 × 1 0,6 1,7 19,4 23,8 0,010
36 × 1,5 0,7 2,0 23,0 28,2 0,010
36 × 2,5 0,8 2,3 28,0 34,2 0,009
48 × 0,5 0,6 1,7 19,8 24,3 0,013
48 × 0,75 0,6 1,8 21,2 25,9 0,011
48 × 1 0,6 1,9 22,5 27,6 0,010
48 × 1,5 0,7 2,2 26,2 32,5 0,010
48 × 2,5 0,8 2,4 32,1 39,1 0,009
60 × 0,5 0,6 1,8 21,7 26,6 0,013
60 × 0,75 0,6 2,0 23,4 28,7 0,011
60 × 1 0,6 2,1 24,9 30,5 0,010
60 × 1,5 0,7 2,4 29,5 35,8 0,010
60 × 2,5 0,8 2,4 35,0 42,6 0,009

Table 4 – Tests for types 60227 IEC 74 and 60227 IEC 75
1 2 3 4
Test method described in
Ref. Category
Tests
no. of test
1 Electrical test
1.1 Resistance of conductors T, S 60227-2 IEC 63294:2021, 5.1
1.2 Voltage test on cores according to specified insulation
thickness
1.2.1 At 1 500 V ≤ 0,6 mm T 60227-2 IEC 63294:2021, 5.3
60227-2 IEC 63294:2021, 5.3
1.2.2 At 2 000 V > 0,6 mm T
1.3 Voltage test on completed cable at 2 000 V T, S 60227-2 IEC 63294:2021, 5.2
1.4 Insulation resistance at 70 °C T 60227-2 IEC 63294:2021, 5.4
IEC 60227-1
1.5 Transfer impedance for screened cables T IEC 62153-4-3:2013, 5.2 and
Clause 6
2 Provisions covering constructional and dimensional 60227-1 and 60227-2
characteristics
2.1 Checking of compliance with constructional provisions T, S IEC 60227-1
Inspection and manual test
2.2 Measurements of insulation thickness T, S 60227-2 IEC 63294:2021, 6.2
2.3 Measurements of thickness of sheath or inner sheath or T, S 60227-2 IEC 63294:2021, 6.3
oversheath
2.4 Measurement of overall diameter
2.4.1 – mean value T, S 60227-2 IEC 63294:2021, 6.4
2.4.2 – ovality T, S 60227-2 IEC 63294:2021, 6.4
3 Mechanical properties of insulation
3.1 Tensile test before ageing T 60811-1-1 IEC 60811-501
3.2 Tensile test after ageing T 60811-1-2 IEC 60811-401
3.3 Loss of mass test T 60811-3-2 IEC 60811-409
4 Mechanical properties of inner sheath
4.1 Tensile test before ageing T 60811-1-1 IEC 60811-501
4.2 Tensile test after ageing T 60811-1-2 IEC 60811-401
5 Mechanical properties of sheath or oversheath
5.1 Tensile test before ageing T 60811-1-1 IEC 60811-501
5.2 Tensile test after ageing T 60811-1-2 IEC 60811-401
5.3 Loss of mass test T 60811-3-2 IEC 60811-409
a
6 Compatibility test T 60811-1-2 IEC 60811-401
7 Pressure test at high temperature
7.1 Insulation T 60811-3-1 IEC 60811-508
7.2 Sheath or oversheath T 60811-3-1 IEC 60811-508
8 Test at low temperature
8.1 Bending test for insulation T 60811-1-4 IEC 60811-504
b
8.2 Bending test for sheath or oversheath T 60811-1-4 IEC 60811-504
c
8.3 Elongation test for sheath or oversheath T 60811-1-4 IEC 60811-505
d
8.4 Impact test T 60811-1-4 IEC 60811-506
9 Heat shock test
9.1 Insulation T 60811-3-1 IEC 60811-509
9.2 Sheath or oversheath T 60811-3-1 IEC 60811-509
10 Mechanical strength of completed cable
e
10.1 Flexing test for unscreened cable T 60227-2 IEC 63294:2021, 6.6
see also 4.4.2 of this document
11 Test of flame retardance T IEC 60332-1-2
12 Mineral oil resistance of sheath or oversheath T 60811-2-1 IEC 60811-404
a
If applicable, see IEC 60227-1.
b
Only applicable to cables having mean overall diameters up to and including 12,5 mm.
c
Only applicable if the mean overall diameter of the cable exceeds 12,5 mm.
d
The inner sheath of screened cables shall also be checked.
e
Not applicable to cables with more than 18 cores.

– 16 – IEC 60227-7:2024 RLV © IEC 2024
Annex A
(normative)
Code designation
Cables of the types covered by this standard are designated by two numerals, preceded by the
reference number of this standard.
The first numeral indicates the basic class of cable; the second numeral indicates the particular
type within the basic class.
The classes and types are as follows:
0. Non-sheathed cables for fixed wiring.
01. Single-core non-sheathed cable with rigid conductor for general purposes
(60227 IEC 01).
02. Single-core non-sheathed cable with flexible conductor for general purposes
(60227 IEC 02).
05. Single-core non-sheathed cable with solid conductor for internal wiring for a conduc-
tor temperature of 70 °C (60227 IEC 05).
06. Single-core non-sheathed cable with flexible conductor for internal wiring for a con-
ductor temperature of 70 °C (60227 IEC 06).
07. Single-core non-sheathed cable with solid conductor for internal wiring for a conduc-
tor temperature of 90 °C (60227 IEC 07).
08. Single-core non-sheathed cable with flexible conductor for internal wiring for a con-
ductor temperature of 90 °C (60227 IEC 08).
1. Sheathed cables for fixed wiring.
10. Light polyvinyl chloride sheathed cable (60227 IEC 10).
4. Non-sheathed flexible cables for light duty.
41. Flat tinsel cord (60227 IEC 41).
42. Flat non-sheathed cord (60227 IEC 42).
43. Cord for decorative chains (60227 IEC 43).
5. Sheathed flexible cables for normal duty.
52. Light polyvinyl chloride sheathed cord (60227 IEC 52).
53. Ordinary polyvinyl chloride sheathed cord (60227 IEC 53).
56. Heat-resistant light PVC-sheathed cord for a maximum conductor temperature of 90 °C
(60227 IEC 56).
57. Heat-resistant ordinary PVC-sheathed cord for a maximum conductor temperature of
90 °C (60227 IEC 57).
7. Sheathed flexible cables for special duty.
71f. Flat polyvinyl chloride sheathed lift cables and cables for flexible connections
(60227 IEC 71f).
74. Oil resistant polyvinyle chloride sheathed, screened flexible cable (60227 IEC 74).

Bibliography
IEC 60227-2, Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V – Part 2: Test methods

___________
___________
Withdrawn.
IEC 60227-7 ®
Edition 2.0 2024-02
INTERNATIONAL
STANDARD
Polyvinyl chloride insulated cables of rated voltages up to and including
450/750 V –
Part 7: Flexible cables screened and unscreened with two or more conductors
and of rated voltages up to and including 300/500 V

– 2 – IEC 60227-7:2024 © IEC 2024
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Oil resistant, polyvinyl chloride sheathed, screened and unscreened flexible cable . 8
4.1 Code designation . 8
4.2 Rated voltage . 8
4.3 Construction . 8
4.3.1 Conductors . 8
4.3.2 Insulation . 8
4.3.3 Assembly of cores and fillers, if any . 8
4.3.4 Inner sheath for screened cables . 8
4.3.5 Screen . 9
4.3.6 Sheath or oversheath . 9
4.3.7 Core identification . 10
4.3.8 Overall diameter . 10
4.4 Tests . 10
4.4.1 General . 10
4.4.2 Flexing test . 10
4.5 Guidance on use . 11
Bibliography . 15

Table 1 – Mass of weight and diameter of pulleys . 10
Table 2 – General data for type 60227 IEC 74 . 12
Table 3 – General data for type 60227 IEC 75 . 13
Table 4 – Tests for types 60227 IEC 74 and 60227 IEC 75 . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
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POLYVINYL CHLO
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