IEC 61386-25:2011

IEC 61386-25 ®
Edition 1.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conduit systems for cable management –
Part 25: Particular requirements – Conduit fixing devices

Systèmes de conduits pour la gestion du câblage –
Partie 25: Exigences particulières – Dispositifs de fixation de conduit

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IEC 61386-25 ®
Edition 1.0 2011-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conduit systems for cable management –
Part 25: Particular requirements – Conduit fixing devices

Systèmes de conduits pour la gestion du câblage –
Partie 25: Exigences particulières – Dispositifs de fixation de conduit

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX Q
ICS 29.120.10 ISBN 978-2-88912-696-5

– 2 – 61386-25  IEC:2011
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 General conditions for tests . 6
6 Classification . 6
7 Marking and documentation . 7
8 Dimensions . 8
9 Construction . 8
10 Mechanical properties . 8
11 Electrical properties . 11
12 Thermal properties . 11
13 Fire hazard . 11
14 External influences . 11
15 Electromagnetic compatibility . 12
Annex A (normative) Classification coding for conduit fixing devices . 16

Figure 101 – Arrangement for lateral load test with mandrel . 13
Figure 102 – Arrangement for lateral load test with conduit . 14
Figure 103 – Arrangement for axial load test . 15

Table 2 – Upper temperature range . 7
Table 101 – Lateral load for test . 10

61386-25  IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –

Part 25: Particular requirements –
Conduit fixing devices
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
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) 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 61386-25 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/635/FDIS 23A/637/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.
This standard is to be read in conjunction with IEC 61386-1:2008, Conduit systems for cable
management – Part 1: General requirements.

– 4 – 61386-25  IEC:2011
The clauses of the particular requirements of this Part 25 add to or modify the corresponding
clauses in Part 1. Where the text of Part 25 indicates an "addition" to or a "deletion” or a
“replacement" of the relevant requirement, test specification or explanation of Part 1, these
changes are made to the relevant text of Part 1, which then becomes part of the standard.
Where no change is necessary, the words "This clause of Part 1 is applicable" are used in
Part 25. Subclauses or figures that are additional to those in Part 1 are numbered starting
from 101.
NOTE The following print types are used:
– requirements: in roman type;
– test specifications: in italic type;
– notes: in small roman type.
A list of all the parts in the IEC 61386 series, under the general title Conduit systems for cable
management, can be found on the IEC website.
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.
61386-25  IEC:2011 – 5 –
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –

Part 25: Particular requirements –
Conduit fixing devices
1 Scope
This clause of Part 1 is applicable except as follows:
Replacement in the first paragraph of the words “conduit fittings” by “conduit fittings and
conduit fixing devices”.
Addition at the end of the clause:
This part of IEC 61386 specifies requirements and tests for conduit fixing devices used for
support and/or retention of conduit for cable management.
2 Normative references
This clause of Part 1 is applicable with the following exception:
Addition:
ISO 4287, Geometrical Product Specifications (GPS) – Surface texture: Profile method –
Terms, definitions and surface texture parameters
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
3.101
conduit fixing device
device designed to provide retention of conduit(s) when installed at intervals along the length
of the conduit. A conduit fixing device is designed so that it can be securely fixed to a
mounting surface.
3.102
metallic conduit fixing device
fixing device consisting of metal only
3.103
non-metallic conduit fixing device
fixing device consisting of non-metallic material only
3.104
composite conduit fixing device
fixing device comprising both metal and non-metallic materials

– 6 – 61386-25  IEC:2011
3.105
retention
limitation of the lateral and/or axial movement of the conduit
4 General requirements
This clause of Part 1 is applicable except as follows:
Replacement:
4.1 Conduit fixing devices shall be so designed and constructed that in normal use their
performance is reliable.
4.2 Conduit fixing devices shall withstand the stresses likely to occur during transport,
storage, recommended installation practice and application.
4.3 Compliance is checked by carrying out all specified tests.
5 General conditions for tests
This clause of Part 1 is applicable, except as follows:
5.1 Replacement:
Tests in accordance with this standard are type tests. Conduit fixing devices, having the same
classification, which vary in colour only, are considered to be the same product type and only
one colour needs to be tested.
Conduit fixing devices are tested as part of a conduit system.
Where a conduit fixing device accommodates a range of conduit sizes, the conduit fixing
device shall be tested using the smallest and the largest conduit size.
5.4 Replacement:
Samples of non-metallic and composite conduit fixing devices shall be conditioned for at least
240 h, at a temperature of (23 ± 2) °C and a relative humidity between 40 % and 60 %. All
tests shall be carried out immediately after general conditioning.
5.5 Replacement:
Unless otherwise specified, the samples for each test shall be in a clean and new condition.
Due regard shall be taken of the manufacturer's instructions, especially where force is
required in the assembly of the joint.
5.6 and 5.9 Not applicable.
6 Classification
This clause of Part 1 is applicable except as follows:
6.1.1, 6.1.3, 6.1.4 and 6.1.5 Not applicable.
Addition:
61386-25  IEC:2011 – 7 –
6.1.101 Resistance to lateral load
1 Light
2 Medium
3 Heavy
6.1.102 Resistance to axial load
1 None declared
2 As declared by the manufacturer
6.2.2 Upper temperature range
Replacement of Table 2:
Table 2 – Upper temperature range
Application and installation –
Classification
Temperature not more than: °C
0 40
1 60
2 90
3 105
4 120
5 150
6 250
7 400
6.3, 6.4.1 and 6.4.2 Not applicable.
7 Marking and documentation
This clause of Part 1 is applicable except as follows:
Replacement:
7.1 Each conduit fixing device shall be marked with
– the manufacturer's or responsible vendor's name or trade mark or identification mark,
– a product identification mark, which may be, for example, a catalogue number, a
symbol or the like, in such a way that it can be identified in the manufacturer’s or
responsible vendor’s literature.
7.1.1 The manufacturer shall be responsible for indicating the compatibility of conduit fixing
devices within conduit systems according to the IEC 61386 series.
7.1.2 The manufacturer shall provide in his literature its classification in accordance with
Clause 6 and all information necessary for the proper and safe transport, storage, installation
and use.
– 8 – 61386-25  IEC:2011
7.2 Replacement:
The conduit fixing device shall be marked in accordance with 7.1, on the product wherever
possible, but where this is impractical, then the mark may be on a label attached to the
product, or on the smallest supplied package.
7.3 and 7.4 Not applicable.
8 Dimensions
This clause of Part 1 is replaced by the following text:
Conduit fixing devices shall be capable of accommodating the size or range of conduit
diameters as declared by the manufacturer or responsible vendor.
9 Construction
This clause of Part 1 is applicable except as follows:
Replacement:
9.1 Within the conduit fixing device there shall be no sharp edges, burrs or surface
projections which are likely to damage the conduit system, or inflict injury on the installer or
user.
Compliance is checked by inspection, if necessary after cutting the samples apart.
9.2 Fixing means shall be designed to withstand the mechanical stresses occurring during
installation and normal use.
Screws, if any, used for assembly of the conduit fixing device, shall not cause damage to the
conduit system components when correctly assembled.
Compliance for screw fixing using preformed threads is checked by the test in 9.3, followed by
inspection.
Compliance for screw fixing using thread-forming screws is checked by the test in 9.4,
followed by inspection.
Compliance for reusable fixings other than screws is checked by assembly and removal ten
times according to the manufacturer’s instruction.
Compliance for non-reusable fixings is checked by assembly to the manufacturer’s instruction.
9.5 and 9.6 Not applicable.
10 Mechanical properties
This clause of Part 1 is applicable except as follows:
Replacement:
10.1.1 Conduit fixing devices shall have adequate mechanical strength.

61386-25  IEC:2011 – 9 –
10.1.2 Compliance is checked by the tests specified in 10.3, 10.101 and 10.102.
10.2 Compression test Not applicable.
10.3.1 Replacement:
Twelve assemblies of a conduit fixing device and a steel mandrel or conduit are subjected to
the impact test by means of the apparatus shown in Figure 2.
Conduit fixing devices which can be used with any type of conduit, with outside diameters
according IEC 60423, shall be tested using a steel mandrel with an outside diameter
according to the minimum diameter of the relevant size.
( )
The manufacturing tolerance of the mandrel shall be mm up to and including 20 mm and
−0,02
( )
mm above nominal size 20 mm.
−0,03
Conduit fixing devices which can only be used with a specific conduit shall be tested using
that conduit.
The test assembly is fixed on a vertical surface as shown in Figure 101 or Figure 102 but with
only one fixing device.
Conduit fixing devices, whose maximum dimension is less than 20 mm, are not subjected to
this test.
10.3.2 Replacement of the last paragraph:
The test shall be made on the weakest part of the conduit fixing device.
10.3.3 Replacement:
After the test, the mandrel or conduit shall remain inside the conduit fixing device and there
shall be no sign of disintegration nor shall there be any crack visible to normal or corrected
vision without magnification.
At least nine of the twelve samples shall pass the test.
10.4 Bending test Not applicable.
10.5 Flexing test Not applicable.
10.6 Collapse test Not applicable.
10.7 Tensile test Not applicable.
10.8 Suspended load test Not applicable.
Addition:
10.101 Lateral load test
10.101.1 Two conduit fixing devices are mounted with a mandrel as shown in Figure 101 or
with an appropriate length of conduit as shown in Figure 102.
Conduit fixing devices which can be used with any type of conduit, with outside diameters
according to IEC 60423, shall be tested using a steel mandrel with an outside diameter

– 10 – 61386-25  IEC:2011
according to the minimum diameter of the relevant size, applying a load, including the weight
of the steel mandrel, according to the classification in 6.1.101, and Table 101.
The steel mandrel shall have a surface roughness of 7 µm Ra in accordance with ISO 4287. The
( )
manufacturing tolerance of the mandrel shall be mm up to and including 20 mm and
−0,02
( )
mm above nominal size 20 mm.
−0,03
Conduit fixing devices which can only be used with a specific conduit shall be tested using
that conduit and the manufacturer shall declare the performance of the combination of conduit
and fixing device. For the purpose of applying the load, a steel rod with an outside diameter of
30 % to 50 % of the inside diameter of the conduit is inserted through the conduit and a load
including the weight of the steel rod, according to the classification in 6.1.101, and Table
101, is applied across the two ends of the steel rod.
The test is carried out on 3 pairs of conduit fixing devices wall mounted and another 3 pairs of
conduit fixing devices ceiling mounted.
10.101.2 For metallic fixing devices, the test load, as declared by the manufacturer or
+10
responsible vendor, is applied, without shock, for a period of (300 ) s at ambient
temperature.
10.101.3 For non-metallic and composite fixing devices, the sample assembly is then placed
in a full draft air circulating oven. The tests are carried out after the oven temperature has
reached and maintained the declared maximum temperature according to Table 2 with a
+2 +5
tolerance of ( ) °C. The load is applied, without shock, and held for a period of (60 ) min.
−2 0
Table 101 – Lateral load for test
Conduit Light lateral load Medium lateral load Heavy lateral load
size up to (classification code 2) (classification code 3) (classification code 4)
mm kg kg kg
6 0,1 0,2 0,4
8 0,2 0,4 0,8
10 0,3 0,6 1,2
12 0,5 1 2
16 0,8 1,6 3,2
20 1 2 4
25 2 4 8
32 3,3 6,6 13,2
40 5,1 10,2 20,4
50 8,0 16 32
63 12,7 25,4 50,8
75 18 36 72
90 25,9 51,8 103,6
110 38,7 77,4 154,8
NOTE 1 Load tolerance up to but not including 1 kg: + 5 %
NOTE 2 Load tolerance 1 kg to 10 kg: + 2 %
NOTE 3 Load tolerance above 10 kg: + 1 %

61386-25  IEC:2011 – 11 –
10.101.4 After the test, the conduit shall still be supported by the conduit fixing devices. This
test is not intended to check the fixing into the mounting surface.
10.102 Axial load test
10.102.1 Conduit fixing devices declaring axial conduit retention according to 6.1.102 are
tested as follows:
Conduit fixing devices which can be used with any type of conduit, with outside diameters
according to IEC 60423, shall be tested using a steel mandrel of appropriate length with an
outside diameter according the minimum diameter of the relevant size.
The steel mandrel shall have a surface roughness of 7 µm Ra in accordance with ISO 4287. The
( )
manufacturing tolerance of the mandrel shall be mm up to and including 20 mm and
−0,02
( )
mm above nominal size 20 mm. The mandrel is assembled to a conduit fixing device,
−0,03
in accordance with the manufacturer’s instructions and Figure 103.
Conduit fixing devices which can only be used with a specific conduit shall be tested using
that conduit and the manufacturer shall declare the performance of the combination of conduit
and fixing device.
A sample of conduit with appropriate length is assembled to a conduit fixing device, in
accordance with the manufacturer’s instructions and Figure 103.
For metallic fixing devices, the test load, as declared by the manufacturer or responsible
vendor, is applied, without shock, for a period of (300 ± 10) s at ambient temperature.
For non-metallic and composite fixing devices, the sample assembly is then placed in a full
draft air circulating oven. The tests are carried out after the oven temperature has reached
and maintained the declared maximum temperature according to Table 2 with a tolerance of
+2
( ) °C. The load is applied, without shock. Then the axial load is maintained for (300 ± 10) s.
−2
10.102.2 After the test, the conduit shall remain properly assembled to the conduit fixing
device, the conduit shall not have displaced more than 2 mm through the conduit fixing device
and there shall be no damage visible to normal or corrected vision without magnification.
11 Electrical properties
This clause of Part 1 is not applicable.
12 Thermal properties
This clause of Part 1 is not applicable.
13 Fire hazard
This clause of Part 1 is applicable. If declared as non-flame propagating, conduit fixing
devices are tested as conduit fittings at a glow wire temperature of 650 °C.
14 External influences
This clause of Part 1 is applicable except as follows:

– 12 – 61386-25  IEC:2011
14.1.2 Degree of protection – Ingress of foreign solid objects
This subclause of Part 1 is not applicable.
14.1.3 Degree of protection – Ingress of water
This subclause of Part 1 is not applicable.
15 Electromagnetic compatibility
This clause of Part 1 is applicable.

Figures
Addition:
61386-25  IEC:2011 – 13 –
400 mm
300 mm
400 mm
300 mm 2
IEC  2084/11
Key
1 Vertical mounting surface
2 Conduit fixing device
3 Steel mandrel
4 Load (including weight of mandrel)
5 Horizontal mounting surface
Figure 101 – Arrangement for lateral load test with mandrel

– 14 – 61386-25  IEC:2011
450 mm
400 mm
300 mm
4 3
450 mm
400 mm
300 mm
IEC  2085/11
Key
1 Vertical mounting surface
2 Conduit fixing device
3 Conduit
4 Steel rod
5 Load (including weight of steel rod)
6 Horizontal mounting surface
Figure 102 – Arrangement for lateral load test with conduit

61386-25  IEC:2011 – 15 –
IEC  2086/11
Key
1 Vertical mounting surface
2 Conduit fixing device
3 Steel mandrel or conduit
4 Load (including weight of mandrel)
Figure 103 – Arrangement for axial load test

– 16 – 61386-25  IEC:2011
Annex A
(normative)
Classification coding for conduit fixing devices

Replacement:
NOTE Annex A shows the classification coding format for declared properties of the conduit fixing device, which
may be incorporated in the manufacturer's literature.

First digit – Resistance to lateral load
(see 6.1.101)
Light lateral load  2
Medium lateral load 3
Heavy lateral load 4
Second digit – Resistance to impact
(see 6.1.2)
Very light imp
...