IEC 61914:2009

IEC 61914 ®
Edition 1.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable cleats for electrical installations

Brides de câbles pour installations électriques

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IEC 61914 ®
Edition 1.0 2009-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Cable cleats for electrical installations

Brides de câbles pour installations électriques

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
U
CODE PRIX
ICS 29.120.10 ISBN 978-2-88910-586-1
– 2 – 61914 © IEC:2009
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 With lateral retention .10
6.4.2 With axial retention.10
6.4.3 Resistant to electromechanical forces, withstanding one short circuit .10
6.4.4 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 .10
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 .13
9.4 Axial load test .13
9.5 Test for resistance to electromechanical force.14
9.5.1 General .14
9.5.2 For cable cleats and intermediate restraints classified in 6.4.3 .14
9.5.3 For cable cleats and intermediate restraints classified in 6.4.4 .14
10 Fire hazards .15
10.1 Flame propagation .15
10.2 Smoke emission .15

61914 © IEC:2009 – 3 –
10.3 Smoke toxicity.15
11 Environmental influences.15
11.1 Resistance to ultraviolet light.15
11.2 Resistance to corrosion .16
11.2.1 General .16
11.2.2 Salt spray test .17
12 Electromagnetic compatibility .17
12.1 Electromagnetic emission.17
12.2 Inductive heating .17
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 .18
Figure 2 – Typical arrangement for lateral load test .19
Figure 3 – Typical arrangement for axial load test.20
Figure 4 – Typical assemblies for test for resistance to electromechanical force .21
Figure 5 – Typical arrangement of three cables in close trefoil formation .21
Figure 6 – Typical arrangement of cables in flat formation .21
Figure 7 – Typical arrangement of the needle-flame test.22
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 .12
Table 4 – Resistance to corrosion.17

– 4 – 61914 © IEC:2009
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,
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
nongovernmental 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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
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.
International Standard IEC 61914 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 RVD
23A/588/FDIS 23A/592/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.
NOTE The following print types are used:
− requirements: in roman type
− test specifications: in italic type
− notes: in small roman type
61914 © IEC:2009 – 5 –
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result 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.
– 6 – 61914 © IEC:2009
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 referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60060-1:1989, 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 868:2003, Plastics and ebonite – Determination of indentation hardness by means of a
durometer (Shore hardness)
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 9227:2006, 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 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 or rail, wire and beam (see Figures A.8 and A.9). Where declared, cable cleats provide
resistance to electromechanical forces

61914 © IEC:2009 – 7 –
3.2
intermediate restraint
cable retaining device designed to be used with cable cleats to hold the cables together in
order to provide resistance to electromechanical forces. Intermediate restraints are not
attached to the mounting surface
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
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
i
p
maximum possible instantaneous value of the short-circuit current (see Annex B)
3.8
initial r.m.s. symmetrical short-circuit current
I"
k
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
i
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
I
k
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
the formation of three cables so laid as to be mutually equidistant. Viewed in cross-section,
the lines joining the cable centres form an equilateral triangle (see Figure 5)
NOTE The formation is known as “close trefoil” formation when the cables are touching each other.
3.12
flat formation
the formation of a number of cables laid in a plane, usually with equal spacing between
adjacent cables (see Figure 6)

– 8 – 61914 © IEC:2009
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. All sizes shall comply with Clause 8 a nd
9. 1 a). Where there are a number of cleats in a range, the range is divided into one or more
classes. In this case, the smallest, the largest and any critical size of cleat in each class are
tested, except for the test in 9.5. The test in 9.5 is performed on the most critical size in each
class.
NOTE For guidance in determining classes, cable cleats or intermediate restraints having material, construction
characteristics, and classifications according to Clause 6 below, in common, are considered of the same class.
5.2 Unless otherwise specified, all tests shall be carried out on three new samples of each
size selected as in 5.1 assembled and installed as for normal use according to the
manufacturer’s or responsible vendor's instructions.
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
+5
(23 ) °C.
−5
5.5 Compliance with this standard is satisfied if all the 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.
NOTE 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.

61914 © IEC:2009 – 9 –
5.6 When toxic or hazardous processes are used, due regard shall be taken of the safety of
persons within the test area.
6 Classification
6.1 According to material
6.1.1 Metallic
6.1.2 Non-metallic
6.1.3 Composite
6.2 According to maximum and minimum temperature
Table 1 – Maximum temperature for permanent application
A. Maximum temperature
°C
+ 40
+ 60
+ 85
+ 105
+ 120
Table 2 – Minimum temperature for permanent application
B. Minimum temperature
°C
+ 5
− 5
− 15
− 25
− 40
− 60
NOTE For temperature values above 120 °C and below −60 °C, the manufacturer or responsible vendor may
declare temperatures outside the values tabulated above.

– 10 – 61914 © IEC:2009
6.3 According to resistance to impact
6.3.1 Very light
6.3.2 Light
6.3.3 Medium
6.3.4 Heavy
6.3.5 Very heavy
6.4 According to type of retention or resistance to electromechanical forces or both
6.4.1 With lateral retention
6.4.2 With axial retention
6.4.3 Resistant to electromechanical forces, withstanding one short circuit
6.4.4 Resistant to electromechanical forces, withstanding more than one short
circuit
Manufacturers of cleats shall declare a classification under 6.4.1 and may also declare a
classification under 6.4.2. Manufacturers of cleats may also declare a classification under
6. 4. 3 o r 6. 4. 4.
Manufacturers of intermediate restraints shall declare a classification under 6. 4. 3 or 6. 4. 4.
6.5 According to environmental influences
6.5.1 Resistant to ultraviolet light for non-metallic and composite components
6.5.1.1 Not declared
6.5.1.2 Resistant to ultraviolet light
6.5.2 Resistant to corrosion for metallic and composite components
6.5.2.1 Low
6.5.2.2 High
7 Marking and documentation
7.1 Marking
Each cleat and intermediate restraint shall be marked with
− the manufacturer’s or responsible vendor’s name or logo or trademark;
− the product identification or type.
Where it is not possible to apply the marking directly onto the product, then the marking shall
be placed on the smallest supplied package.
7.2 Durability and legibility
Marking on the product shall be durable and easily legible to normal or corrected vision.

61914 © IEC:2009 – 11 –
Compliance is checked by inspection and by rubbing the marking by hand for 15 s with a
piece of cloth soaked with water and again for 15 s with a piece of cloth soaked with
petroleum spirit.
After the test, the marking shall remain legible to normal or corrected vision.
Marking made by moulding, pressing or engraving is not subjected to the rubbing test.
NOTE Marking may be applied, for example, by moulding, pressing, engraving, printing, adhesive labels, etc.
7.3 Documentation
The manufacturer or responsible vendor shall provide in their literature:
− the classifications according to Clause 6;
− the maximum and minimum cable or bundle diameters;
− the lateral load for cleats declared under 6. 4. 1;
− the axial load for cleats declared under 6. 4. 2;
− the method of assembly and installation including tightening torques, where appropriate.
Additionally, for cleats and/or intermediate restraints declared under 6. 4. 3 or 6. 4. 4:
− the peak short-circuit current;
− the initial r.m.s. symmetrical short-circuit current;
− the cable outside diameter used in the test in 9.5 ;
− the maximum spacing, D, as shown in Figure 4.
Compliance is checked by inspection.
NOTE Some or all of this information may also be required to be provided on packaging or instruction sheets
supplied with the product.
8 Construction
The surfaces of cleats and intermediate restraints shall be free from sharp edges, burrs, flash,
etc. that are likely to damage cables or inflict injury to the installer or user.
Compliance is checked by visual and manual inspection of the surface.
9 Mechanical properties
9.1 Requirements
Cleats and intermediate restraints shall be:
a) capable of accommodating the size or range of cable or cable bundle diameter declared
by the manufacturer or responsible vendor without cracking or breaking, or stripping screw
threads;
Compliance is checked by measurement and by visual and manual inspection.
b) resistant to impact at the minimum declared temperature;
Compliance is checked by the test according to 9.2.
c) capable of withstanding the lateral load at the maximum declared temperature;

– 12 – 61914 © IEC:2009
Compliance is checked by the test according to 9.3.
d) capable of withstanding the axial load at the maximum declared temperature where
declared in 6 . 4. 2;
Compliance is checked by the test in 9.4.
e) resistant to electromechanical forces, where declared in 6 . 4. 3 or 6. 4. 4.
Compliance is checked by the test in 9.5.
9.2 Impact test
The impact test is carried out using a typical arrangement as shown in Figure 1. The
component transmitting the impact to the cleat or intermediate restraint shall have a spherical
+5
radius of (300 )mm at the point of contact.
−5
Before the test, the samples are assembled onto a solid polyamide 66 test mandrel having a
diameter equivalent to the maximum declared diameter for which the cleat is designed and
mounted on a rigid support.
For cleats and intermediate restraints taking more than one cable, the appropriate number of
mandrels is used.
For metallic cleats and intermediate restraints, the test is carried out at ambient temperature.
For composite and non-metallic cleats and intermediate restraints, the samples are
conditioned at the declared lowest temperature according to Table 2 with a tolerance of
+2 +5 0
( )°C for a period of (60 )min. The impact is applied within a period of (10 )s after
−2 0 −2
removal from the refrigerator.
Each sample is placed in position on the steel base as shown in Figure 1. The energy value of
the hammer is as declared in Table 3.
The impact is applied at the weakest point of the cleat or intermediate restraint and the
direction of impact is radial to the centre of the mandrel.
After the test, the samples shall show no signs of disintegration nor shall there be any cracks
or damage, visible to normal or corrected vision, that are likely to impair normal use. In case
of doubt, the samples are subjected to the test of 9.3.
Table 3 – Impact test values
Classification Impact Equivalent mass Height
energy
kg
J
mm (± 1%)
Very light 0,5 0,25 200
Light 1,0 0,25 400
Medium 2,0 0,5 400
Heavy 5,0 1,7 300
Very heavy 20,0 5,0 400
61914 © IEC:2009 – 13 –
9.3 Lateral load test
The cleat is mounted on a test rig as shown in Figure 2, or a similar arrangement. The
mounting surface can be made of steel or aluminium plate, plywood or other material. For the
purpose of applying the load, a rigid mandrel of circular, or other appropriate cross-section, is
positioned within the cleat’s aperture. Care is taken to ensure that the load acts through the
centre line of the cleat’s aperture. The mandrel size is the minimum for which the cleat is
designed.
For metallic cable cleats, the declared load is applied gradually and held for a period of
+1
(5 ) min.
For non-metallic and composite cleats, the sample assembly is placed in a full draft
air-circulating oven. The tests are carried out after the oven temperature has reached and
+2
maintained the declared maximum temperature from Table 1 with a tolerance of ( )°C. The
−2
+5
load is applied gradually and then held for a period of (60 ) min.
The test load as declared by the manufacturer or responsible vendor is applied in the most
onerous direction of normal use.
Movement of the mandrel shall be less than 50 % of the mandrel diameter.
NOTE The test is meant to determine the lateral retention of the cleat and not the strength of the mounting
surface.
9.4 Axial load test
The test is carried out using a mandrel with an overall diameter equivalent to the minimum
declared cable diameter for which the cleat is designed. The test mandrel shall have a
+0,2
diametrical tolerance of ( )mm for mandrels up to and including 16 mm diameter and of
−0,2
+0,3
( )mm for larger diameters. In the case of non-circular cables, a profile is to be used
−0,3
simulating the outer cable dimension, as declared by the manufacturer or responsible vendor.
All mandrels shall have a surface roughness less than or equal to 7 μm R in accordance with
a
ISO 4287. For test temperatures below 105 °C, test mandrels shall be solid polyamide 66
+15
having a hardness of (70 ) Shore D points in accordance with ISO 868. Metallic mandrels
−15
shall be used for test temperatures 105 °C and higher.
The cleat is mounted on a rigid mounting surface and assembled in the test rig as shown in
Figure 3, or a similar arrangement. The mounting surface can be made of steel or aluminium
plate, plywood or other material.
For metallic cable cleats, the declared load is applied gradually and held for a period of
+1
(5 ) min.
For non-metallic and composite cleats, the sample assembly is placed in a full draft
air-circulating oven. The tests are carried out after the oven temperature has reached and
+2
maintained the declared maximum temperature from Table 1 with a tolerance of ( ) °C. The
−2
+1
load is applied gradually and held for a period of (5 ) min.
After the test, the displacement of the mandrel with respect to the cleat shall not be more than
5 mm.
– 14 – 61914 © IEC:2009
9.5 Test for resistance to electromechanical force
9.5.1 General
A short-circuit test is carried out as follows, using the manufacturer’s or responsible vendor's
declared values of peak short-circuit current(i ) and initial r.m.s. symmetrical short-circuit
p
current(I" ). Where there are a number of cleats in the range, one or more classes are defined
k
(see 5.1). This test is performed on the most critical size in each class.
The test is carried out at ambient temperature using unarmoured single core 600 V / 1 000 V
stranded copper conductor cable. The test is carried out on the declared arrangement at the
declared short-circuit level. Typical assemblies are shown in Figure 4.
The arrangement of the cables is as shown in Figure 5 or Figure 6 or any other configuration
as declared by the manufacturer or responsible vendor. One end is connected to a three
phase supply and the other end to a short-circuiting busbar with all three phases being
connected. The cable is restrained at a minimum of 5 positions along the cable run. Where
intermediate restraints are used, at least 4 cleats and at least 3 intermediate restraints shall
be used. Cleats and intermediate restraints, where used, shall be equally spaced. The cleats
are fixed to a mounting surface defined by the manufacturer (e.g. cable ladder) which shall be
selected with regard to the forces likely to occur during the test.
Care is taken to ensure the cross-sectional area of the cable is adequate for the magnitude
and duration of the test current.
The manufacturer’s or responsible vendor’s catalogue references of the cable cleat and
intermediate restraint (where used), the assembly details showing the spacing and the cable
external diameter used in the test shall be recorded.
If the test station has to undertake a calibration test, action is taken to ensure that the test
installation is not affected.
The test set-up is subjected to a three phase short circuit of duration of not less than 0,1 s.
The duration of the test is recorded.
NOTE 1 Care must be taken to ensure that there is adequate restraint for the cables at each end of the cable run
to be tested.
NOTE 2 Annex B may be used to calculate the theoretical forces that may be created during short circuits in order
to plan testing.
9.5.2 For cable cleats and intermediate restraints classified in 6. 4. 3
Cleats and intermediate restraints classified under 6.4.3 shall comply with the following
requirements:
− there shall be no failure that will affect the intended function of holding the cables in place;
− the cable cleats and the intermediate restraints, if used, shall be intact with no missing
parts (minor deformation is acceptable):
− there shall be no cuts or damage visible to normal or corrected vision to the outer sheath
of the cable caused by the cable cleats or by the intermediate restraints, if used.
9.5.3 For cable cleats and intermediate restraints classified in 6. 4. 4
Cleats and intermediate restraints classified under 6.4.4 shall comply with 9.5.2.
After a second short-circuit application, a voltage withstand test is performed by applying a
+5
minimum test voltage of 2,8 kV d.c. for a period of (60 ) s according to the provisions of
61914 © IEC:2009 – 15 –
IEC 60060-1:1989, 13.1, Requirements for the test voltage, and 14.1, Withstand voltage tests.
The voltage withstand test shall be administered between the cable cores and the mounting
frame. The mounting frame shall be bonded to the earthing system. Where the cables
incorporate screening or shielding, the screens and shields shall be bonded together and also
bonded to the mounting frame. Where the cables do not incorporate screening or shielding,
the cable jackets and mounting frame shall be pre-wetted with sufficient water to facilitate a
current leakage path along the outer jacket. The cable jackets and mounting frame shall be
+15
+1
pre-wetted for (2 ) min before the test begins using water with a resistivity of (100 ) Ω.m,
0 −15
which shall be measured immediately before starting the test.
The cables shall meet the requirements of the voltage withstand test without failure of the
insulation.
10 Fire hazards
10.1 Flame propagation
Non-metallic and composite cable cleats and intermediate restraints shall have adequate
resistance to flame propagation.
Compliance is checked by the following test.
Using an arrangement as shown in Figure 7, the sample shall be submitted to the needle-
flame test as specified in IEC 60695-11-5 with the following additional information:
− the flame shall be applied to the outer surface of the sample,
+0
− the time of application shall be (30 ) s,
−1
− the underlying layer shall consist of three layers of tissue paper,
− there shall be a single application of the flame.
The sample shall be deemed to have passed the test if:
− 30 s after the test flame is removed, there is no flaming of the sample,
− there is no ignition of the tissue paper.
10.2 Smoke emission
The smoke emissions from cleats and intermediate restraints need not be considered because
of their small size and quantity in normal use.
10.3 Smoke toxicity
The smoke toxicity from cleats and intermediate restraints need not be considered because of
their small size and quantity in normal use.
11 Environmental influences
11.1 Resistance to ultraviolet light
Cleats and intermediate restraints classified according to 6.5.1.2 shall be subjected to
ultraviolet light (UV) conditioning according to the following requirements.
When the product is provided in more than one colour, the colour having the heaviest organic
pigment loading shall be subjected to this test. The samples tested are considered
representative of the entire colour range.

– 16 – 61914 © IEC:2009
Samples shall be mounted in the ultraviolet light apparatus in a convenient manner suitable
for the product to be tested and the test equipment and so that the samples do not touch each
other.
The samples are to be exposed for 700 h at a spectral irradiance of 0,51 W/(m •nm) or for
1 000 h at a spectral irradiance of 0,35 W/(m •nm) to Xenon-arc, Method A, Cycle 1 in
accordance with ISO 4892-2. There shall be continuous exposure to light and intermittent
exposure to water spray. The cycle shall consist of 102 min without water spray and 18 min
with water spray. The apparatus shall operate with a water-cooled xenon-arc lamp,
borosilicate glass inner and outer optical filters, a spectral irradiance of either 0,51 W/(m •nm)
+3
or 0,35 W/(m •nm) at 340 nm and a blackpanel temperature of (65 ) °C. The temperature of
−3
+3 +10
the chamber shall be (38 ) °C. The relative humidity in the chamber shall be (50 ) %.
−3 −10
Following the exposure, the samples shall be held for a minimum of 30 min under ambient
conditions.
After UV exposure, the samples shall show no signs of disintegration nor shall there be any
cracks or damage, visible to normal or corrected vision. The samples shall then be subjected
to the impact test, as described in 9.2 and shall comply with the impact test requirements.
In addition where declared in accordance with 6.4.3 or 6.4.4, the sample shall comply with the
requirements of the relevant test specified in 9.1 e) at the declared values after the ultraviolet
light exposure.
11.2 Resistance to corrosion
11.2.1 General
Metallic or composite cleats and intermediate restraints shall have adequate resistance to
corrosion.
Compliance is determined by the test in 11.2.2 unless otherwise specified below.
Metallic or composite cleats and intermediate restraints made of non-ferrous metals, cast-
iron, malleable-iron or stainless steel containing at least 16 % chromium need not be tested
and are assumed to meet the classification for high resistance to corrosion. Stainless steel
containing at least 13 % chromium is assumed to meet the classification for low resistance to
corrosion and need only be tested where declared in accordance with 6. 5. 2. 2 f or hi g h
resistance. Where corrosion protection is provided by a layer of zinc equal to or greater than
that specified in Table 4, measurement of the zinc layer is required without the need to carry
out further testing.
The mean and minimum thickness shall be determined by taking five measurements over the
plated surface.
Screws shall not be subjected to the test in 11.2.2, however, the presence of a protective
coating is required.
The presence of a coating on screws shall be determined by inspection with normal or
corrected vision.
A cut edge, a punched hole and the threaded surface of a tapped hole of a part formed from
galvanized stock of thickness 2.5 mm or less is not required to be coated.

61914 © IEC:2009 – 17 –
Table 4 – Resistance to corrosion
Classification Typical Mean zinc layer Minimum zinc layer Salt spray duration
usage thickness thickness
h
μm μm
Low Indoor, dry locations 5 3,5 24
High a 25 18 192
Outdoor, wet locations
a
For use in marine or other corrosive environments, additional protection may be required.
11.2.2 Salt spray test
All grease shall be removed from the parts to be tested, by cleaning with white spirit. All parts
shall then be dried. The samples shall then
...