Cable cleats for electrical installations

IEC 61914:2015 is available as IEC 61914:2015 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 61914:2015 specifies requirements and tests for cable cleats and intermediate restraints used for securing cable in electrical installations. Cable cleats provide resistance to electromechanical forces where declared. This standard includes cable cleats that rely on a mounting surface specified by the manufacturer for axial and/or lateral retention of cables. This second edition cancels and replaces the first edition published in 2009. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
a) Additional declaration and test for lateral load retention depending on cleat mounting orientation with associated new figures;
b) Additional declaration of the distance between the cable centres in any short-circuit test and associated new figures;
c) Specification of the cable to be used in short-circuit testing and relaxation of the ambient temperature limits for the test;
d) Additional requirement to photograph the short-circuit test arrangement before and after the test and to record more complete details of the cable used;
e) Revised parameters for the test of resistance to UV light.
This edition also includes the following editorial changes with respect to the previous edition:
f) Revised and updated normative references and bibliography;
g) Editorial clarification of definitions;
h) Editorial clarification of procedures for selection of test samples and the testing of cleats designed for more than one cable;
i) Relaxation of some mandrel material requirements;
j) Clarification of the inspection requirements following a short-circuit test and adding the option of either a.c. or d.c. voltage testing following a second short-circuit;
k) Clarification that the resistance to corrosion test applies to all types of fixing;
l) New cleat example illustration;
m) Limitations of use of the formulae in Annex B added.

Brides de câbles pour installations électriques

IEC 61914:2015 est disponible sous forme de IEC 61914:2015 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.
L'IEC 61914:2015 spécifie les exigences et essais pour brides de câbles et dispositifs intermédiaires de tenue utilisés pour la fixation de câbles dans des installations électriques. Les brides de câbles fournissent une résistance aux forces électromécaniques lorsque cela est déclaré. La présente norme inclut les brides de câbles qui reposent sur une surface de montage spécifiée par le fabricant pour le maintien axial et/ou latéral des câbles. Cette deuxième édition annule et remplace la première édition parue en 2009. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
a) Déclaration et test complémentaires pour le maintien latéral à la charge en fonction de l'orientation de montage des brides, et ajout de nouvelles figures associées;
b) Déclaration supplémentaire de la distance entre les centres des câbles pour tout essai de court-circuit, et mise à jour des figures associées;
c) Définition du type de câble à utiliser pour les essais de court-circuit et assouplissement des limites de température ambiante durant les essais;
d) Ajout de photographies illustrant le montage d'essai avant et après l'essai de court-circuit et exigence supplémentaire de consigner les caractéristiques détaillées du câble utilisé;
e) Modifications des paramètres de l'essai de tenue aux rayonnements lumineux ultraviolets.
Cette édition inclut également les modifications éditoriales suivantes par rapport à l'édition précédente:
f) Mise à jour des références normatives et de la bibliographie;
g) Clarification éditoriale des définitions;
h) Clarification éditoriale des règles de choix des échantillons d'essai et des essais de brides de câbles conçues pour plusieurs câbles;
i) Assouplissement de certaines exigences relatives aux matériaux des mandrins;
j) Clarification des exigences de contrôle après un essai de court-circuit et ajout de l'option d'essai en tension alternative ou en tension continue après un deuxième court-circuit;
k) Clarification de l'application de l'essai de tenue à la corrosion à tous les types de fixations;
l) Nouvelle illustration d'exemple de bride de câbles;
m) Limitations de l'utilisation des formules de l'Annexe B.

General Information

Status
Published
Publication Date
22-Nov-2015
Current Stage
PPUB - Publication issued
Start Date
23-Nov-2015
Completion Date
23-Nov-2015
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IEC 61914
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable cleats for electrical installations
Brides de câbles pour installations électriques
IEC 61914:2015-11(en-fr)
---------------------- Page: 1 ----------------------
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---------------------- Page: 2 ----------------------
IEC 61914
Edition 2.0 2015-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable cleats for electrical installations
Brides de câbles pour installations électriques
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.20 ISBN 978-2-8322-3012-1

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

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

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 3 ----------------------
– 2 – IEC 61914:2015 © IEC 2015
CONTENTS

FOREWORD ........................................................................................................................... 4

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

3 Terms, definitions and abbreviations ............................................................................... 6

4 General requirements ...................................................................................................... 8

5 General notes on tests .................................................................................................... 8

6 Classification ................................................................................................................... 9

6.1 According to material .............................................................................................. 9

6.1.1 Metallic ............................................................................................................ 9

6.1.2 Non-metallic .................................................................................................... 9

6.1.3 Composite ....................................................................................................... 9

6.2 According to maximum and minimum temperature .................................................. 9

6.3 According to resistance to impact ......................................................................... 10

6.3.1 Very light ....................................................................................................... 10

6.3.2 Light .............................................................................................................. 10

6.3.3 Medium ......................................................................................................... 10

6.3.4 Heavy ............................................................................................................ 10

6.3.5 Very heavy .................................................................................................... 10

6.4 According to type of retention or resistance to electromechanical forces or

both ...................................................................................................................... 10

6.4.1 General ......................................................................................................... 10

6.4.2 With lateral retention ..................................................................................... 10

6.4.3 With axial retention ........................................................................................ 10

6.4.4 Resistant to electromechanical forces, withstanding one short circuit ............ 10

6.4.5 Resistant to electromechanical forces, withstanding more than one

short circuit .................................................................................................... 10

6.5 According to environmental influences .................................................................. 10

6.5.1 Resistant to ultraviolet light for non-metallic and composite components ....... 10

6.5.2 Resistant to corrosion for metallic and composite components ...................... 10

7 Marking and documentation ........................................................................................... 10

7.1 Marking ................................................................................................................. 10

7.2 Durability and legibility .......................................................................................... 11

7.3 Documentation ...................................................................................................... 11

8 Construction .................................................................................................................. 11

9 Mechanical properties.................................................................................................... 11

9.1 Requirements ....................................................................................................... 11

9.2 Impact test ............................................................................................................ 12

9.3 Lateral load test .................................................................................................... 14

9.4 Axial load test ....................................................................................................... 15

9.5 Test for resistance to electromechanical force ...................................................... 17

9.5.1 General ......................................................................................................... 17

9.5.2 For cable cleats and intermediate restraints classified in 6.4.4 ...................... 19

9.5.3 For cable cleats and intermediate restraints classified in 6.4.5 ...................... 19

10 Fire hazards .................................................................................................................. 19

10.1 Flame propagation ................................................................................................ 19

---------------------- Page: 4 ----------------------
IEC 61914:2015 © IEC 2015 – 3 –

10.2 Smoke emission .................................................................................................... 20

10.3 Smoke toxicity ...................................................................................................... 20

11 Environmental influences ............................................................................................... 21

11.1 Resistance to ultraviolet light ................................................................................ 21

11.2 Resistance to corrosion ........................................................................................ 21

11.2.1 General ......................................................................................................... 21

11.2.2 Salt spray test ............................................................................................... 22

12 Electromagnetic compatibility ........................................................................................ 22

12.1 Electromagnetic emission ..................................................................................... 22

12.2 Inductive heating .................................................................................................. 22

Annex A (informative) Examples of cable cleats ................................................................... 23

Annex B (informative) Calculation of forces caused by short-circuit currents ....................... 24

B.1 Characteristics ...................................................................................................... 24

B.2 Specification of the test current ............................................................................. 25

B.3 Calculation of the mechanical forces between conductors ..................................... 25

Bibliography .......................................................................................................................... 28

Figure 1– Typical arrangement for impact test ...................................................................... 13

Figure 2 – Typical arrangements for lateral load test ............................................................. 15

Figure 3 – Typical arrangement for axial load test ................................................................. 16

Figure 4 – Typical assemblies for test for resistance to electromechanical force ................... 17

Figure 5 – Typical arrangement of three cables in trefoil formation ....................................... 18

Figure 6 – Typical arrangement of cables in flat formation .................................................... 18

Figure 7 – Typical arrangement of the needle-flame test ....................................................... 20

Figure B.1 – Short-circuit current of a far-from-generator short circuit with constant a.c.

component ............................................................................................................................ 24

Figure B.2 – Short-circuit current of a near-to-generator short circuit with decaying a.c.

component ............................................................................................................................ 25

Figure B.3 – Two parallel conductors .................................................................................... 26

Table 1 – Maximum temperature for permanent application .................................................... 9

Table 2 – Minimum temperature for permanent application ..................................................... 9

Table 3 – Impact test values ................................................................................................. 14

Table 4 – Resistance to corrosion ......................................................................................... 22

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– 4 – IEC 61914:2015 © IEC 2015
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE CLEATS FOR ELECTRICAL INSTALLATIONS
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,

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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

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services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

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indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of

patent rights. IEC shall not be held responsible for identifying any or all such patent rights.

International Standard IEC 61914 has been prepared by subcommittee 23A: Cable
management systems, of IEC technical committee 23: Electrical accessories.

This second edition cancels and replaces the first edition published in 2009. This edition

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:

a) Additional declaration and test for lateral load retention depending on cleat mounting

orientation with associated new figures;

b) Additional declaration of the distance between the cable centres in any short-circuit test

and associated new figures;

c) Specification of the cable to be used in short-circuit testing and relaxation of the ambient

temperature limits for the test;

d) Additional requirement to photograph the short-circuit test arrangement before and after

the test and to record more complete details of the cable used;
---------------------- Page: 6 ----------------------
IEC 61914:2015 © IEC 2015 – 5 –
e) Revised parameters for the test of resistance to UV light.

This edition also includes the following editorial changes with respect to the previous edition:

f) Revised and updated normative references and bibliography;
g) Editorial clarification of definitions;

h) Editorial clarification of procedures for selection of test samples and the testing of cleats

designed for more than one cable;
i) Relaxation of some mandrel material requirements;

j) Clarification of the inspection requirements following a short-circuit test and adding the

option of either a.c. or d.c. voltage testing following a second short-circuit;

k) Clarification that the resistance to corrosion test applies to all types of fixing;

l) New cleat example illustration;
m) Limitations of use of the formulae in Annex B added.
The text of this standard is based on the following documents:
FDIS Report on voting
23A/786/FDIS 23A/795/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.

In this standard, the following print types are used:
– requirements proper: in roman type;
– test specifications: in italic type;
– notes: in smaller roman type.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication 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.
---------------------- Page: 7 ----------------------
– 6 – IEC 61914:2015 © IEC 2015
CABLE CLEATS FOR ELECTRICAL INSTALLATIONS
1 Scope

This International Standard specifies requirements and tests for cable cleats and intermediate

restraints used for securing cable in electrical installations. Cable cleats provide resistance to

electromechanical forces where declared. This standard includes cable cleats that rely on a

mounting surface specified by the manufacturer for axial and/or lateral retention of cables.

This standard does not apply to:
− cable glands;
− cable ties.
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 60060-1:2010, High-voltage test techniques – Part 1: General definitions and test

requirements

IEC 60695-11-5:2004, Fire hazard testing – Part 11-5: Test flames – Needle-flame test

method – Apparatus, confirmatory test arrangement and guidance

ISO 4287:1997, Geometrical product specifications (GPS) – Surface texture: Profile method –

Terms, definitions and surface texture parameters

ISO 4892-2:2006, Plastics – Methods of exposure to laboratory light sources – Part 2: Xenon-

arc lamps
ISO 9227:2012, Corrosion tests in artificial atmospheres – Salt spray tests
3 Terms, definitions and abbreviations

For the purposes of this document, the following terms, definitions and abbreviations apply.

3.1
cable cleat

device designed to provide securing of cables when installed at intervals along the length of

cables

Note 1 to entry: A cable cleat is provided with a means of attachment to a mounting surface but does not rely on

an unspecified mounting surface for the retention of the cables. Examples of mounting surfaces that may be

specified are ladder, tray, strut (see Figure A.8) or rail. Where declared, cable cleats provide resistance to

electromechanical forces.

Note 2 to entry: See Figure A.1 to Figure A.9 for some examples of cable cleats. These examples do not limit the

use of other cable cleat designs that conform to the requirements of this standard.

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IEC 61914:2015 © IEC 2015 – 7 –
3.2
intermediate restraint

cable retaining device designed to be used with cable cleats, without being attached to the

mounting surface, to hold the cables together in order to provide resistance to
electromechanical forces
3.3
metallic
consisting of metal only
3.4
non-metallic
consisting of non-metallic material only
3.5
composite
consisting of metallic and non-metallic materials

Note 1 to entry: Fibre reinforced resin materials are not considered to be composite under this definition.

3.6
short-circuit current

overcurrent resulting from a circuit condition in which the current flows through an abnormal

or unintended path of negligible impedance between live conductors, or between a live

conductor and an earth, having a difference in potential under normal operating conditions

3.7
peak short-circuit current
maximum possible instantaneous value of the short-circuit current (see Annex B)
3.8
initial r.m.s. symmetrical short-circuit current

r.m.s. value of the a.c. symmetrical component of a short-circuit current, applicable at the

instant of the short circuit if the impedance remains at the zero-time value (see Annex B)

3.9
decaying (aperiodic) component of short-circuit current
d.c.

mean value between the top and bottom envelope of a short-circuit current decaying from an

initial value to zero (see Annex B)
3.10
steady-state short-circuit current

r.m.s. value of the short-circuit current which remains after the decay of the transient

phenomena (see Annex B)
3.11
trefoil formation
formation of three cables so laid as to be mutually equidistant

Note 1 to entry: Viewed in cross-section, the lines joining the cable centres form an equilateral triangle

(see Figure 5).

Note 2 to entry: The formation is known as “close trefoil” formation when the cables are touching each other.

---------------------- Page: 9 ----------------------
– 8 – IEC 61914:2015 © IEC 2015
3.12
flat formation

formation of a number of cables laid in a plane, usually with equal spacing between adjacent

cables (see Figure 6)
3.13
electromechanical forces
induced forces acting on current-carrying conductors
3.14
retention
limiting the lateral and/or axial movement of the cable
3.15
securing
fixing to or from a mounting surface or another product
3.16
environmental influences
effect of corrosive substances or solar radiation, etc.
4 General requirements

Products covered by this standard shall be so designed and constructed that, when

assembled and installed as for normal use according to the manufacturer’s instructions, they

ensure securing of cables as declared in accordance with Clause 6 and shall not cause

damage to the cable.
Compliance is checked by the relevant tests specified in this standard.
5 General notes on tests
5.1 Tests according to this standard are type tests.
− Products of all sizes shall comply with Clause 8 and 9.1a).

− For the requirements in 9.1b), 9.1c) and 9.1d) where there are a number of cleats in a

range, the range is divided into one or more types. In this case, the smallest and the

largest size of cleat of each type are tested.

− The test for compliance with 9.1e) is performed on the set of samples selected as defined

in 9.5.1.

NOTE For guidance in determining types, cable cleats or intermediate restraints having material, construction

characteristics, and classifications according to Clause 6 below, in common, are considered to be the same type.

5.2 Unless otherwise specified, all tests shall be carried out on three new samples of each

size selected as specified in 5.1, assembled and installed as for normal use according to the

manufacturer’s or responsible vendor's instructions. Where a cable cleat is designed to

accommodate more than one cable the number, size and shape of the mandrels used in the

test shall represent the number, size and shape of the cables for which the cable cleat is

intended.

5.3 Tests on non-metallic and composite cleats and intermediate restraints shall not

commence earlier than 168 h after manufacture.

5.4 Unless otherwise specified, the tests shall be carried out at an ambient temperature of

(23 ) °C.
---------------------- Page: 10 ----------------------
IEC 61914:2015 © IEC 2015 – 9 –

5.5 Compliance with this standard is satisfied if all the applicable test requirements are

achieved. If only one of the samples does not satisfy a test due to a manufacturing fault, then

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 made in the same required sequence on

another full set of samples, all of which shall comply with the requirements.

The applicant, when submitting the first set of samples, may also submit an additional set of

samples, which may be necessary should one sample fail. The test house should then,

without further request, test the additional set of samples and should only reject if a further

failure occurs. If the additional set of samples is not submitted at the same time, a failure of

one sample would entail rejection.

5.6 When toxic or hazardous processes are used, due regard shall be taken of the safety of

persons within the test
...

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