IEC 62549:2011

IEC 62549 ®
Edition 1.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Articulated systems and flexible systems for cable guiding

Systèmes articulés et souples pour guidage de câbles

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IEC 62549 ®
Edition 1.0 2011-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Articulated systems and flexible systems for cable guiding

Systèmes articulés et souples pour guidage de câbles

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 29.120.10 ISBN 978-2-88912-756-6

– 2 – IEC 62549:2011/ISH1:2015  IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
IEC 62549
Edition 1.0  2011-10
ARTICULATED SYSTEMS AND FLEXIBLE SYSTEMS FOR CABLE GUIDING

INTERPRETATION SHEET 1
This interpretation sheet has been prepared by subcommittee 23A: Cable management
systems, of IEC technical committee 23: Electrical accessories.
The text of this interpretation sheet is based on the following documents:
ISH Report on voting
23A/769/ISH 23A/783/RVD
Full information on the voting for the approval of this interpretation sheet can be found in the
report on voting indicated in the above table.
___________
Interpretation of Subclause 10.2 of IEC 62549 Ed.1.
10.2 Impact test
10.2.3 The impact to be applied is the one declared according to the classification in
Subclause 6.2.
Interpretation of Clause 13 of IEC 62549 Ed.1.
13 External influences
13.1.2 The classification to be checked is the one declared according to Subclause 6.5.1.
13.1.3 The classification to be checked is the one declared according to Subclause 6.5.2.
13.1.4 The classification to be checked is the one declared according to Subclause 6.5.3.

ICS 29.120.10
– 2 – 62549 © IEC:2011
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 General requirements . 9
5 General conditions for tests . 9
6 Classification . 10
6.1 According to temperatures as given in Table 1 and Table 2 . 10
6.2 According to resistance to impact . 10
6.3 According to the installation onfloor . 11
6.4 According to electrical continuity characteristic . 11
6.5 According to degrees of protection, if any, provided by the system according
to IEC 60529:1989 . 11
7 Marking and documentation . 11
8 Dimensions . 12
9 Construction . 12
9.1 Sharp edges . 12
9.2 Minimum bending radius . 12
9.3 Cable retention . 13
9.4 Protection against ingress of solid foreign objects . 13
9.5 Protection against ingress of water . 14
9.6 Protection against access to hazardous parts . 14
9.7 Relieve terminals from strain . 14
9.8 Apparatus mounting . 15
9.9 Reliable connection to earth for accessible conductive parts . 16
9.10 Electrically protective separation . 16
9.11 Inlet openings . 16
9.12 Mechanical connections . 16
10 Mechanical properties . 17
10.1 Mechanical strength . 17
10.2 Impact test . 17
10.3 External load test for apparatus mounting . 19
10.3.1 Fixing test for apparatus mounting of socket-outlets . 19
10.3.2 Fixing test for apparatus mounting other than socket-outlets . 19
10.4 External load test . 19
10.4.1 Axial load test . 19
10.4.2 Compression test. 20
11 Electrical properties . 21
11.1 Electrical continuity . 21
11.2 Void . 22
12 Fire hazard . 22
12.1 Contribution to fire . 22
12.2 Void . 23
13 External influences . 23
13.1 Degree of protection provided by enclosure . 23

62549 © IEC:2011 – 3 –
13.1.2 Protection against ingress of solid foreign objects . 23
13.1.3 Protection against ingress of water . 23
13.1.4 Protection against access to hazardous parts . 24
14 Electromagnetic compatibility . 24
Annex A (normative) Summary of requirements to be applied to boxes . 38
Annex B (normative) IK code . 39
Bibliography . 40

Figure 1 – Example of articulated system for cable guiding . 24
Figure 2 – Examples of flexible system for cable guiding . 25
Figure 3 – Examples of application of systems for cable guiding . 29
Figure 4 – Minimum bending radius measurement . 29
Figure 5 – Examples of arrangements for cable retention tests . 30
Figure 6 – Typical apparatus for testing the resistance of cable anchorage to pull force . 31
Figure 7 – Typical apparatus for testing the resistance of cable anchorage to twist
force . 32
Figure 8 – Examples of arrangement for impact test . 34
Figure 9 – Examples of arrangement for axial load test . 36
Figure 10 – Arrangement for compression test . 37

Table 1 – Minimum application temperature . 10
Table 2 – Maximum application temperature . 10
Table 3 – Torque values for screwed connections . 14
Table 4 – Forces and torques to be applied to cable anchorage . 15

– 4 – 62549 © IEC:2011
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARTICULATED SYSTEMS AND FLEXIBLE
SYSTEMS FOR CABLE GUIDING
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.
This International Standard IEC 62549 has been prepared by subcommittee 23A: Cable
management systems, of IEC technical committee 23: Electrical accessories.
The text of this standard is based on the following documents:
FDIS Report on voting
23A/636/FDIS 23A/641/RVD
Full information on the voting for the approval of this standard 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.

62549 © IEC:2011 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
The contents of the interpretation sheet 1 of October 2015 have been included in this copy.

– 6 – 62549 © IEC:2011
ARTICULATED SYSTEMS AND FLEXIBLE
SYSTEMS FOR CABLE GUIDING
1 Scope
This International Standard specifies requirements and tests for systems with adaptable linear
geometry for cable guiding intended for the accommodation and retention of cables and
possibly other electrical equipment in electrical and/or communication systems installations.
The maximum voltage of these installations is 1 000 V a.c. and 1 500 V d.c.
This standard does not apply to cable trunking systems, cable ducting systems, conduit
systems, cable tray systems, cable ladder systems, powertrack systems, energy conveying
chains or equipment covered by other standards.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and
are indispensable for its application. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60068-2-75:1997, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 60417, Graphical symbols for use on equipment
IEC 60423:2007, Conduit systems for cable management – Outside diameters of conduits for
electrical installations and threads for conduits and fittings
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
Amendment 1 (1999)
IEC 60670-1:2002, Boxes and enclosures for electrical accessories for household and similar
fixed electrical installations – Part 1: General requirements
IEC 60670-22:2003, Boxes and enclosures for electrical accessories for household and
similar fixed electrical installations – Part 22: Particular requirements for connecting boxes
and enclosures
IEC 60670-23:2006, Boxes and enclosures for electrical accessories for household and
similar fixed electrical installations – Part 23: Particular requirements for floor boxes and
enclosures
IEC 60670-24:2011, Boxes and enclosures for electrical accessories for household and
similar fixed electrical installations – Part 24: Particular requirements for enclosures for
housing protective devices and other power dissipating electrical equipment
IEC 60695-2-11:2000, Fire hazard testing – Part 2-11: Glowing/hot-wire based test methods –
Glow-wire flammability test method for end-products
Corrigendum (2001)
___________
There exists a consolidation version of IEC 60529 (2001), which contains IEC 60529 (1989) and its
amendment 1 (1999).
62549 © IEC:2011 – 7 –
IEC 60695-11-5:2004, Fire hazard testing – Part 11-5: Test flames – Needle-flame test
method - Apparatus, confirmatory test arrangement and guidance
IEC 62262:2002, Degrees of protection provided by enclosures for electrical equipment
against external mechanical impacts (IK code)
3 Terms and definitions
For the purpose of this document, the following definitions apply.
3.1
articulated system for cable guiding
assembly comprising an articulated length for cable guiding and possibly other system
components to provide accommodation of cables and possibly the accommodation of other
electrical equipment
NOTE 1 An example of an articulated system for cable guiding is shown in Figure 1.
NOTE 2 Examples of application are shown in Figure 3.
3.2
flexible system for cable guiding
assembly comprising a flexible length for cable guiding and possibly other system
components to provide accommodation of cables and possibly the accommodation of other
electrical equipment
NOTE 1 Examples of flexible system for cable guiding are shown in Figure 2.
NOTE 2 Examples of application are shown in Figure 3.
3.3
system component
part of the system which includes
a) articulated length for cable guiding or flexible length for cable guiding,
b) box,
c) apparatus mounting device,
d) fixing device,
e) system accessory
NOTE A system does not necessarily include all system components a) to e). Different combinations of system
components may be used.
3.4
articulated length for cable guiding
system component of an articulated system for cable guiding consisting of several elements
which are connected by articulated joint(s)
3.5
flexible length for cable guiding
system component of a flexible system for cable guiding with adaptable linear geometry other
than articulated length
3.6
enclosure
combination of parts, such as boxes, covers, cover-plates, lids, box extensions, accessories,
etc. providing, after assembly and installation as in normal use, an appropriate protection
against external influences and a defined protection against contact with enclosed live parts
from any accessible direction
– 8 – 62549 © IEC:2011
[Definition 3.1 in IEC 60670-1:2002]
3.7
box
part of an enclosure provided with means for fixing a cover, cover-plate, accessory, etc. and
intended to receive accessories (such as socket-outlets, switches, etc.)
[Definition 3.2 in IEC 60670-1:2002]
3.8
apparatus mounting device
system component to accommodate electrical apparatus (switches, socket-outlets, circuit
breakers, telephone outlets, etc.)
NOTE An apparatus mounting device can be a separate system component, a part integral with a box, a part
integral with an electrical apparatus, etc.
3.9
fixing device
system component to secure another system component to a surface
3.10
system accessory
system component which provides a supplementary function
NOTE Examples of system accessories are derivation, protection against traffic loads, etc.
3.11
metallic system component
system component which consists of metallic material only
3.12
non-metallic system component
system component which consists of non-metallic material only
3.13
composite system component
system component comprising both metallic and non-metallic materials
3.14
external influence
factor which may affect the system
3.15
live part
conductor or conductive part intended to be energized in normal operation, including a neutral
conductor, but by convention not a PEN conductor or PEM conductor or PEL conductor
NOTE This concept does not necessarily imply a risk of electric shock
[IEC 60050-826:2004, definition 12-08]
3.16
cable anchorage
system accessory or part of another system component to relieve conductors in terminals and
terminations from strain by resisting the pull and twist forces on cable

62549 © IEC:2011 – 9 –
3.17
cable retainer
system accessory or part of the articulated length for cable guiding or part of the flexible
length for cable guiding to retain cables
3.18
(electrically) protective separation
separation of one electric circuit from another by means of
− double insulation or
− basic insulation and electrically protective screening or
− reinforced insulation
[IEC 60050-195:2004, definition 195-06-19]
4 General requirements
Articulated systems for cable guiding and flexible systems for cable guiding shall be so
designed and constructed that they provide reliable accommodation and retention to the
cables contained therein.
If required, the system shall also provide electrically protective separation.
System components shall withstand the stresses likely to occur during recommended
installation practice and usage.
Boxes, if any, shall provide adequate enclosure to electrical apparatus (switches, socket-
outlets, circuit breakers, telephone outlets, etc.) and shall comply with the relevant parts of
the IEC 60670 series.
Equipment associated with or incorporated in a system component but which is not a system
component shall and need only comply with the relevant standard of this equipment, if any.
However, it may be necessary to include such equipment in a test arrangement for the
purpose of testing its interface with the articulated systems for cable guiding or the flexible
systems for cable guiding.
Compliance is checked by carrying out all the tests specified.
5 General conditions for tests
5.1 Unless otherwise specified, tests according to this standard are type tests.
5.2 Samples of system components are called hereafter samples.
5.3 Unless otherwise specified, tests are carried out considering the declared classification
with the articulated system for cable guiding or the flexible system for cable guiding
assembled and installed as in normal use according to the manufacturer's instructions.
For the following tests of the IEC 60670 series, boxes are tested with the relevant system
components and the cables:
– Clause10 Protection against electric shock
– Subclause 13.2 Protection against the ingress of solid objects
– Subclause 13.3 Protection against harmful ingress of water

– 10 – 62549 © IEC:2011
Tests on non-metallic system components or composite system components shall not
commence earlier than 168 h after manufacture. During this period the samples may be aged
when specified in this standard.
5.4 Unless otherwise specified, tests are carried out at an ambient temperature of
(20 ± 5) °C.
5.5 Unless otherwise specified, all tests are carried out on new samples.
5.6 When toxic or hazardous processes are used, precautions shall be taken to safeguard
the test personnel.
5.7 Unless otherwise specified, three samples are subjected to the tests and the
requirements are satisfied if all the tests are successful.
If only one of the samples does not satisfy a test due to an assembly or a manufacturing fault,
that test and any preceding one which may have influenced the results of the test shall be
repeated and also the tests which follow shall be carried out in the required sequence on
another full set of samples, all of which shall comply with the requirements.
NOTE The applicant, when submitting a set of samples, may also submit an additional set of samples which may
be necessary should one sample fail. The test house will then, without further request, test the additional set of
samples and will reject only if a further failure occurs.
If the additional set of samples is not submitted at the same time, the failure of one sample will entail rejection.
6 Classification
6.1 According to temperatures as given in Table 1 and Table 2
Table 1 – Minimum application temperature
Minimum application temperature
°C
- 25
- 15
- 5
+ 5
+ 15
Table 2 – Maximum application temperature
Maximum application temperature
°C
+ 60
+ 90
+ 105
+ 120
NOTE The above maximum application temperatures are operating temperatures and not ambient temperatures.
6.2 According to resistance to impact
6.2.1 System providing impact resistance up to 0,5 J
6.2.2 System providing impact resistance up to 1 J
6.2.3 System providing impact resistance up to 2 J

62549 © IEC:2011 – 11 –
6.2.4 System providing impact resistance up to 5 J
6.2.5 System providing impact resistance up to 10 J
6.2.6 System providing impact resistance up to 20 J
6.3 According to the installation onfloor
6.3.1 System not intended to be installed onfloor
6.3.2 System intended to be installed onfloor
6.4 According to electrical continuity characteristic
6.4.1 System with electrical continuity characteristic
6.4.2 System without electrical continuity characteristic
6.5 According to degrees of protection, if any, provided by the system according to
IEC 60529:1989
6.5.1 According to protection against ingress of solid foreign objects
6.5.2 According to protection against ingress of water
6.5.3 According to protection against access to hazardous parts
7 Marking and documentation
7.1 Each system component shall be marked with
– the manufacturer's or responsible vendor's name or trade mark or identification mark and,
– a product identification mark, which may be, for example, a catalogue number, a symbol or
the like.
When system components other than articulated lengths for cable guiding, flexible lengths for
cable guiding or boxes are supplied in a package, and it is not possible to have both markings
legible due to the small size of the item
– if only 1 legible marking is possible, it is sufficient to mark the product identification on the
smallest supplied package, the manufacturer's or responsible vendor's name or trade mark
or identification mark being marked on the product
– if no legible marking is possible at all, it is sufficient to place both markings on the
smallest supplied package
Terminals for protective earth shall be marked according to 7.4. This marking shall not be
placed on screws or any other easily removable part.
Compliance is checked by inspection using one sample.
7.2 Marking shall be durable and easily legible.
Compliance is checked by inspection and for marking on the product, in addition, by rubbing
the marking by hand for at least 15 s with a piece of cotton cloth soaked with water and again
for at least 15 s with a piece of cotton cloth soaked with petroleum spirit.

– 12 – 62549 © IEC:2011
NOTE 1 Petroleum spirit is defined as the aliphatic solvent hexane with a content of aromatics of maximum 0,1 %
volume, a kauri-butanol value of 29, initial boiling point of 65 °C, a dry point of 69 °C and a specific gravity of
approximately 0,68 kg/l.
NOTE 2 Marking may be applied, for example, by moulding, pressing, engraving, printing, adhesive labels, or
water slide transfers.
NOTE 3 Marking made by moulding, pressing or engraving is not subjected to the rubbing test.
After the rubbing test, the marking shall be legible.
7.3 The manufacturer shall provide in his documentation all information necessary for the
proper and safe installation and use. It shall include
– a listing of the system components,
– a description of the function of the system components and of their assemblies,
– the classification of the system in accordance with Clause 6 with the following exception
– classification according to 6.4.2 does not need to be declared,
– the allowed minimum bending radius as shown in Figure 4,
– the smallest and the largest outer diameter of the cables that can be used within the
system,
– the usable cross-sectional area, in mm , for cables.
Compliance is checked by inspection.
7.4 If symbols are used, they shall comply with the IEC 60417 such as
– Volts V
– Protective earth
– Degree of protection IPXX (see IEC 60529:1989)
8 Dimensions
There are no dimensional requirements.
9 Construction
9.1 Sharp edges
Within the system, there shall be no sharp edges, burrs or surface projections which are likely
to damage cables, or inflict injury on the installer or user.
Compliance is checked by inspection using one sample, if necessary after cutting the sample
apart.
Screws, studs or other securing devices provided shall be fitted so as not to damage the
cables.
Compliance is checked by inspection.
9.2 Minimum bending radius
It shall be possible to easily bend the articulated length for cable guiding or the flexible length
for cable guiding with a bending radius as small as that declared by the manufacturer. See
Figure 4.
62549 © IEC:2011 – 13 –
Compliance is checked by measurement on a horizontal flat surface of the minimum possible
radius in each direction declared by the manufacturer. The measured minimum possible
radius shall be lower than that declared by the manufacturer multiplied by 1,05.
It shall not be possible to bend the articulated length for cable guiding or the flexible length
for cable guiding with a bending radius significantly smaller than that declared by the
manufacturer.
Compliance is checked by bending in each direction declared by the manufacturer the
articulated length for cable guiding or the flexible length for cable guiding not less than 360º
in order to achieve the minimum possible radius. A cylinder having a radius equal to that
declared by the manufacturer multiplied by 0,9 shall pass through the inner open space left by
the articulated length for cable guiding or the flexible length for cable guiding.
9.3 Cable retention
9.3.1 Articulated lengths for cable guiding and flexible lengths for cable guiding shall retain
cables to prevent them from moving outside the guide.
Compliance is checked by the tests of 9.3.2 and 9.3.3.
9.3.2 An articulated length for cable guiding or a flexible length for cable guiding, in extended
configuration when the product is intended to be used in extended or non-extended
configuration, having a minimum length of 0,5 m is mounted in a straight horizontal line on a
rigid smooth vertical support such as a plywood board 16 mm thick in the most unfavourable
orientation for the retention of the cables. One flexible cable with the smallest outer diameter
according to manufacturer’s instruction and with the same length as the test sample is
installed in the test sample in the most unfavourable position, as shown in Figure 5a.
After at least 1 min, the cable shall not have moved outside of any cable retainer of the
articulated length for cable guiding or the flexible length for cable guiding.
9.3.3 An articulated length for cable guiding or a flexible length for cable guiding, in extended
configuration when the product is intended to be used in extended or non-extended
configuration, having a minimum length of 0,5 m is mounted in straight horizontal line on a
rigid smooth vertical support such as a plywood board 16 mm thick in the most unfavourable
orientation for the retention of the cables.
Each compartment of the sample is subjected to an evenly distributed load of approximately
0,8 g/mm per metre length of the declared usable cross-sectional area for cables. This load
is achieved with flexible cables with the smallest outer diameter according to manufacturer’s
instructions, as shown in figure 5b. The number of cables to be used is the minimum amount
which provides this load.
After at least 30 min, no cable shall have moved outside of any cable retainer of the
articulated length for cable guiding or the flexible length for cable guiding.
9.4 Protection against ingress of solid foreign objects
Articulated systems for cable guiding and flexible systems for cable guiding classified
according to 6.5.1 shall provide adequate protection against the ingress of solid foreign
objects.
Compliance is checked by the test of 13.1.2.

– 14 – 62549 © IEC:2011
9.5 Protection against ingress of water
Articulated systems for cable guiding and flexible systems for cable guiding classified
according to 6.5.2 shall provide adequate protection against the ingress of water.
Compliance is checked by the test of 13.1.3.
9.6 Protection against access to hazardous parts
Articulated systems for cable guiding and flexible systems for cable guiding classified
according to 6.5.3 shall provide adequate protection against access to hazardous parts.
Compliance is checked by the test of 13.1.4.
9.7 Relieve terminals from strain
9.7.1 When the articulated system for cable guiding or the flexible system for cable guiding is
provided with means to relieve conductors from strain in terminals or terminations, such
means shall be effective.
NOTE The conductors which are referred to are located in an enclosure such as a box.
Compliance is checked
– when a cable anchorage is used, by inspection and by the test of 9.7.2,
– when other means are used, by the test of 9.7.3.
9.7.2 The effectiveness of the cable anchorage is checked by means of apparatus as shown
in Figure 6 and Figure 7.
The cable anchorage is fitted with a cable of the smallest outer diameter for which it is
intended. The screws, if any, are tightened with a torque as specified by the manufacturer.
Where the manufacturer does not specify the torque the values of Table 3 apply.
Table 3 – Torque values for screwed connections
Nominal diameter of thread Torque
for metallic screws
mm
Nm
I II III
Up to and including 2,8 0,2 0,4 0,4
Over 2,8 up to and including 3,0 0,25 0,5 0,5
Over 3,0 up to and including 3,2 0,3 0,6 0,6
Over 3,2 up to and including 3,6 0,4 0,8 0,8
Over 3,6 up to and including 4,1 0,7 1,2 1,2
Over 4,1 up to and including 4,7 0,8 1,8 1,8
Over 4,7 up to and including 5,3 0,8 2,0 2,0
Over 5,3 up to and including 6,0 1,2 2,5 3,0
Over 6,0 up to and including 8,0 2,5 3,5 6,0
Over 8,0 3,0 4,0 10,0
NOTE 1 Torque values for non-metallic screws are under consideration.
NOTE 2 Column I applies to screws which cannot be tightened by means of a screwdriver with a blade wider
than the diameter of the screw.
Column II applies to other screws that are tightened by means of a screwdriver.
Column III applies to screws and nuts that are tightened by means other than a screwdriver.

62549 © IEC:2011 – 15 –
The cable is then subjected 50 times for a minimum of 1 s to a pull force as specified in Table
4 and immediately afterwards the cable is subjected to a torque not less than the relevant
value specified in Table 4 for (15 ± 1) s applied as near as practicable to the cable entry.
Table 4 – Forces and torques to be applied to cable anchorage
Minimum outer diameter of cable Force Torque
mm N Nm
Up to and including 5,0
40 ± 2 0,05 ± 0,01
Over 5,0 up to and including 8,0
50 ± 2 0,10 ± 0,01
Over 8,0 up to and including 11,0 60 ± 2 0,15 ± 0,01
Over 11,0 up to and including 16,0
80 ± 2 0,35 ± 0,01
Over 16,0
100 ± 2 0,42 ± 0,01
The test is then repeated with a cable anchorage fitted with a cable of the largest outer
diameter for which it is intended.
After any of the tests
– the longitudinal displacement of the cable in the cable anchorage shall not be more than
2 mm,
– the cable shall not have turned in the cable anchorage more than 2 revolutions,
– no cable shall show signs of damage that could impair safety or its function.
9.7.3 After installation according to the manufacturer’s instructions a pull force according to
Table 4 for the smallest and the largest outer diameter of cable according to manufacturer’s
instructions is applied in the most unfavourable direction for (60 ± 5) s. The force is applied to
the cable unless access to the cable is prevented by the system, in which case the load in
applied to the articulated length or the flexible length.
During the application of the force there shall be no stress on insulated conductors in
terminals or terminations.
After the test, no cable shall show signs of damage that could impair safety or its function.
9.8 Apparatus mounting
When the articulated system for cable guiding or the flexible system for cable guiding is
provided with means for the mounting of apparatus, these means shall adequately secure this
apparatus.
Compliance is checked by the test of 10.3.

– 16 – 62549 © IEC:2011
9.9 Reliable connection to earth for accessible conductive parts
9.9.1 Accessible conductive parts of articulated systems for cable guiding and flexible
systems for cable guiding shall comply with 9.9.2 unless they comply with 9.9.3.
9.9.2 Accessible conductive parts of articulated systems for cable guiding and flexible
systems for cable guiding installed according to the manufacturer's instructions which are
likely to become live in the event of an insulation fault shall have provision for reliable
connection to earth.
If precautions are taken in order to prevent creepage distances and clearances from
becoming less than 3 mm, even if a conductor should become loose from its terminal, the
accessible conductive part is not considered likely to become live.
Protection against electric shock in case of a fault may be omitted for accessible conductive
parts which, owing to their reduced dimensions (up to approximately 50 mm x 50 mm) or their
disposition, cannot be gripped or come into significant contact with a part of the human body
and provided that connection with a protective conductor could only be made with difficulty or
would be unreliable.
NOTE This requirement applies, for example, to bolts, rivets, nameplates and cable clips.
Compliance is checked by inspection, measurement and if necessary by the appropriate test
of 11.1.
9.9.3 Accessible conductive parts need not have provision for connection to earth if they are
insulated from live parts with supplementary or reinforced insulation used to form barriers or
linings which shall be designed in such a way that
– they cannot be removed without being permanently damaged or
– they cannot be replaced in an incorrect position or
– if omitted, the system is rendered inoperable or manifestly incomplete.
Compliance is checked by inspection.
NOTE For particular applications, it may be necessary to equipotentially bond these parts or to connect these
parts to the earthing conductor for functional purposes such as EMC.
9.10 Electrically protective separation
Under consideration.
9.11 Inlet openings
Inlet openings, if any, shall allow the introduction of conduits and/or the like or the protective
covering of the cable at least 1 mm into the system component in order to maintain the
mechanical protection.
Inlet openings for conduits shall be capable of accepting conduit sizes according to
IEC 60423:2007.
Compliance is checked by inspection and measurement.
9.12
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