IEC 61386-23:2021
(Main)Conduit systems for cable management - Part 23: Particular requirements - Flexible conduit systems
Conduit systems for cable management - Part 23: Particular requirements - Flexible conduit systems
IEC 61386-23:2021 specifies the requirements for flexible conduit systems. This document is to be used in conjunction with IEC 61386-1:2008 and IEC 61386‑1:2008/AMD1:2017. This second edition cancels and replaces the first edition published in 2002. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Annex AA has been added to provide guidance on the application of a constantly increasing force.
Systèmes de conduits pour la gestion du câblage - Partie 23: Exigences particulières - Systèmes de conduits souples
L’IEC 61386-23:2021 spécifie les exigences pour les systèmes de conduits souples.
Le présent document doit être utilisé conjointement avec l'IEC 61386-1:2008 et l’IEC 61386‑1:2008/AMD1:2017.
Cette deuxième édition annule et remplace la première édition parue en 2002. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
L’Annexe AA a été ajoutée. Elle donne des recommandations relatives à l’application d’une force en augmentation constante.
La présente version bilingue (2021-12) correspond à la version anglaise monolingue publiée en 2021-04.
La version française de cette norme n'a pas été soumise au vote.
General Information
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Standards Content (Sample)
IEC 61386-23 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
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variety of criteria (reference number, text, technical publications previews. With a subscription you will always
committee, …). It also gives information on projects, replaced have access to up to date content tailored to your needs.
and withdrawn publications.
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The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and
and French, with equivalent terms in 18 additional languages.
once a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
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If you wish to give us your feedback on this publication or
need further assistance, please contact the Customer Service
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IEC 61386-23 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.10 ISBN 978-2-8322-9668-4
– 2 – IEC 61386-23:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 General conditions for tests . 5
6 Classification . 5
7 Marking and documentation . 5
8 Dimensions. 6
9 Construction . 6
10 Mechanical properties. 6
11 Electrical properties . 8
12 Thermal properties . 8
13 Fire hazard . 8
14 External influences . 8
15 Electromagnetic compatibility . 8
Annex A (normative) Classification coding for conduit systems . 12
Annex B (normative) Determination of material thickness . 12
Annex C (normative) Additional test requirements for conduit systems already
complying with IEC 61386-1:2008 . 12
Annex AA (informative) Calculation for minimum and maximum rate of increase of
force for 10.2.4 . 13
Figure AA.1 – Graph showing force against time for 750 N force. 13
Figure 101 – Flexing test apparatus . 9
Figure 102 – Gauge for checking the minimum inside diameter of the conduit system
after impact and resistance to heat tests . 10
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test . 11
Table AA.1 – Minimum and maximum rate of increase of force for 10.2.4 . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
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.
International Standard IEC 61386-23 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 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Annex AA has been added to provide guidance on the application of a constantly
increasing force.
– 4 – IEC 61386-23:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
23A/952/FDIS 23A/957/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61386 series, published under the general title Conduit
systems for cable management, can be found on the IEC website.
This document is to be used in conjunction with IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017.
This document supplements or modifies the corresponding clauses of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017. Where a particular clause or subclause of IEC 61386-1:2008
and IEC 61386-1:2008/AMD1:2017 is not mentioned in this document, that clause or
subclause applies as far as is reasonable. Where this document states "addition",
"modification" or "replacement", the relevant text of IEC 61386-1:2008 and
IEC 61386-1:2008/
...
IEC 61386-23 ®
Edition 2.0 2021-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform IEC online collection - oc.iec.ch
The advanced search enables to find IEC publications by a Discover our powerful search engine and read freely all the
variety of criteria (reference number, text, technical publications previews. With a subscription you will always have
committee, …). It also gives information on projects, replaced access to up to date content tailored to your needs.
and withdrawn publications.
Electropedia - www.electropedia.org
IEC Just Published - webstore.iec.ch/justpublished
The world's leading online dictionary on electrotechnology,
Stay up to date on all new IEC publications. Just Published
containing more than 22 000 terminological entries in English
details all new publications released. Available online and once
and French, with equivalent terms in 18 additional languages.
a month by email.
Also known as the International Electrotechnical Vocabulary
(IEV) online.
IEC Customer Service Centre - webstore.iec.ch/csc
If you wish to give us your feedback on this publication or need
further assistance, please contact the Customer Service
Centre: sales@iec.ch.
IEC 61386-23 ®
Edition 2.0 2021-04
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 29.120.10 ISBN 978-2-8322-9709-4
– 2 – IEC 61386-23:2021 RLV © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 6
5 General conditions for tests . 6
6 Classification . 6
7 Marking and documentation . 7
8 Dimensions. 7
9 Construction . 7
10 Mechanical properties. 7
11 Electrical properties . 9
12 Thermal properties . 9
13 Fire effects hazard . 10
14 External influences . 10
15 Electromagnetic compatibility . 10
Annex A (normative) Classification coding for conduit systems . 15
Annex B (normative) Determination of material thickness . 15
Annex C (normative) Additional test requirements for conduit systems already
complying with IEC 61386-1:2008 . 15
Annex AA (informative) Calculation for minimum and maximum rate of increase of
force for 10.2.4 . 16
Figure 101 – Flexing test apparatus . 11
Figure 102 – Gauge for checking the minimum inside diameter of the conduit system
after impact and resistance to heat tests . 12
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test . 13
Figure AA.1 – Graph showing force against time for 750 N force. 16
Table AA.1 – Minimum and maximum rate of increase of force for 10.2.4 . 17
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
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 redline version of the official IEC Standard allows the user to identify the changes made to
the previous edition IEC 61386-23:2002. A vertical bar appears in the margin wherever a change
has been made. Additions are in green text, deletions are in strikethrough red text.
– 4 – IEC 61386-23:2021 RLV © IEC 2021
International Standard IEC 61386-23 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 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Annex AA has been added to provide guidance on the application of a constantly increasing
force.
The text of this International Standard is based on the following documents:
FDIS Report on voting
23A/952/FDIS 23A/957/RVD
Full information on the voting for the approval of this International Standard can be found in the
report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61386 series, published under the general title Conduit systems
for cable management, can be found on the IEC website.
This document is to be used in conjunction with IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017.
This document supplements or modifies the corresponding clauses of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017. Where a particular clause or subclause of IEC 61386-1:2008
and IEC 61386-1:2008/AMD1:2017 is not mentioned in this document, that clause or subclause
applies as far as is reasonable. Where this document states "addition", "modification" or
"replacement", the relevant text of IEC 61386-1:2008 and IEC 61386-1:2008/AMD1:2017 is to
be adapted accordingly.
Subclauses, tables and figures which are in addition to those in IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017 are numbered starting with 101. Annexes which are additional
to those in IEC 61386-1:2008 and IEC 61386-1:2008/AMD1:2017 are lettered AA, BB, etc.
In this document, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
– Explanatory matter: in smaller roman type.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document 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.
– 6 – IEC 61386-23:2021 RLV © IEC 2021
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
1 Scope
This clause of part 1 is applicable, except as follows:
Clause 1 of IEC 61386-1:2008 is applicable, except as follows:
Addition:
This part of IEC 61386 specifies the requirements for flexible conduit systems.
2 Normative references
This clause of part 1 is applicable.
Clause 2 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
IEC 61386-1:2008, Conduit systems for cable management – Part 1: General requirements
IEC 61386-1:2008/AMD1:2017
3 Terms and definitions
This clause of part 1 is applicable.
Clause 3 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
4 General requirements
This clause of part 1 is applicable.
Clause 4 of IEC 61386-1:2008 is applicable.
5 General conditions for tests
This clause of part 1 is applicable.
Clause 5 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
6 Classification
This clause of part 1 is applicable, except as follows:
Clause 6 of IEC 61386-1:2008 is applicable, except as follows:
Subclauses Classifications 6.1.3, 1; 6.1.3, 2 and 6.1.3, 3 are not applicable.
NOTE Flexible conduit systems according to 6.1.1, 1; 6.1.1, 2; 6.1.2, 1; 6.1.2, 2 and classification 1X 1 from 6.2.1,
Table 1 are not allowed in France.
7 Marking and documentation
This clause of part 1 is applicable, except as follows:
Clause 7 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
7.1.101 The conduit shall be marked in accordance with 7.1 along its entire length at regular
intervals of preferably 1 m but not longer than 3 m. Where this is technically impractical, the
mark shall be on a label attached to the product at each end, or on the packaging.
Compliance is checked by inspection.
7.1.102 The manufacturer shall document or add to include in the packaging for the system,
the minimum inside diameter, the minimum bend radius and the classification in accordance
with Clause 6 for the conduit system.
Compliance is checked by inspection of the documentation.
8 Dimensions
Replacement:
8.1 Threads shall comply with IEC 60423.
Compliance is checked by means of the gauges specified in IEC 60423.
8.2 The minimum inside diameter of the conduit system shall be as declared by the
manufacturer.
Compliance is checked by measurement.
9 Construction
This clause of part 1 is applicable.
Clause 9 of IEC 61386-1:2008 is applicable.
10 Mechanical properties
This clause of part 1 is applicable, except as follows:
10.1 Mechanical strength
10.1.1 Addition:
– 8 – IEC 61386-23:2021 RLV © IEC 2021
NOTE Very light flexible conduits should not be considered as providing adequate mechanical protection and should
not be used within the construction of buildings.
Clause 10 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
10.2 Compression test
Subclause 10.2 is applicable with the following addition:
10.2.4 Add the following note at the end of Subclause 10.2.4:
NOTE In order to achieve a uniformly increasing compression force, the force indicated in Table 4 is divided by
time; this value is the required rate per second to fulfil the requirement.
Example: For a test force of 750 N an increase of the test force of 25 N/s is required (750 divided by 30 equals 25).
Informative Annex AA gives detailed calculations including tolerances for time and force.
10.4 Bending test
This subclause of part 1 is not applicable.
Subclause 10.4 of IEC 61386-1:2008 is not applicable.
10.5 Flexing test
Addition:
10.5.101 An assembly consisting of a conduit with a terminating conduit fitting, assembled in
accordance with the manufacturer's instructions, shall be subjected to a flexing test by means
of the apparatus shown in Figure 101.
10.5.102 The test shall be made on six samples of conduit of an appropriate length. Three of
the samples shall be tested at the minimum declared temperature for transport, application and
installation temperature as given in Table 1 with a tolerance of ±2 °C. The other three samples
shall be tested at the maximum declared application and installation temperature as given in
Table 2 with a tolerance of ±2 °C.
A manufacturer may declare that a flexible conduit is suitable for transport and installation
according to Table 1 but may only be suitable for flexing at ambient temperature as a minimum.
In this case the test shall be carried out at (20 ± 2) °C and the third digit of the classification
code shall be X. The manufacturer shall clearly declare in its literature both the minimum
transport and installation temperature in accordance with Table 1, the minimum application
temperature which is ambient and the maximum installation and application temperature in
accordance with Table 2.
10.5.103 The sample shall be fixed to the oscillating member by means of the terminating
conduit fitting as shown in Figure 101, so that when the conduit is at the middle of its travel, the
axis of the conduit is vertical and passes through the axis of the oscillation. The apparatus with
the sample shall be conditioned for 2 h or until the sample has attained the declared
temperature, whichever period is the longer.
10.5.104 The oscillating member shall be moved backwards and forwards through a total
angle of (180 ± 5)° divided equally about the vertical axis. The assembly shall be subjected to
5 000 flexings at a rate of (40 ± 5) flexings per minute. A flexing constitutes, starting from the
vertical position, one continuous cycle of movement of essentially sinusoidal forms.
10.5.105 After the test, the sample shall show no sign of disintegration, nor shall there be any
cracks visible to normal or corrected vision without magnification and it shall be possible to
pass the appropriate gauge, as shown in Figure 102, through the sample under its own weight
and without any initial speed.
10.6 Collapse test
This subclause of part 1 is not applicable.
Subclause 10.6 of IEC 61386-1:2008 is not applicable.
10.7 Tensile strength test
This subclause of part 1 is applicable, except as follows:
Subclause 10.7 of IEC 61386-1:2008 is applicable, except as follows:
10.7.3 Replacement:
For conduit systems where tensile strength is not declared, the tensile strength of the joint shall
comply with classification 1 in Table 6.
11 Electrical properties
This clause of part 1 is applicable, except as follows:
Clause 11 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
11.2 Bonding test
Replacement:
A sample of a conduit and terminating conduit fitting shall be assembled in accordance with the
manufacturer's instructions and mounted as shown in Figure 103. A current of 25 A, having a
frequency of 50 Hz to 60 Hz, derived from an AC source having a no-load voltage not exceeding
+5
12 V, shall be passed through the assembly for ( ) s. Then the voltage drop shall be
measured between the points shown in Figure 103 and the resistance calculated from the
current and this voltage drop.
The resistance shall not exceed 0,05 Ω.
Where special devices are required for the coupling of conduit and conduit fittings, they shall
be sufficient to remove the protective coating from the conduit, or the protective finish shall be
removed in accordance with the manufacturer’s instructions.
12 Thermal properties
This clause of part 1 is applicable, except as follows:
Clause 12 of IEC 61386-1:2008 is applicable, except as follows:
12.2.4 12.3 Replacement:
The load is then removed and immediately after its removal it shall be possible to pass the
appropriate gauge, in accordance with Figure 102, through the conduit under its own weight
and without any initial speed, with the sample in the vertical position.
– 10 – IEC 61386-23:2021 RLV © IEC 2021
13 Fire effects hazard
This clause of part 1 is applicable.
Clause 13 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
14 External influences
This clause of part 1 is applicable.
Clause 14 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
15 Electromagnetic compatibility
This clause of part 1 is applicable.
Clause 15 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
Addition:
Key
A Conduit
B Terminating fitting
d Outside diameter of conduit (A)
s
d Inside diameter of support block: 1,1 × d
n s
R Radius of support block: 0,5 × d
,
Radius of support block: 0,25 × d
R
2 s
Y Minimum bend radius, declared by the manufacturer
Z 1,5 × Y
1 Oscillating member
2 Guide support block
3 Plan view of guide support block
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 101 – Flexing test apparatus
– 12 – IEC 61386-23:2021 RLV © IEC 2021
D 80 % of the manufacturer's declared minimum inside diameter of
the conduit system
Material Steel, hardened and polished, edges slightly rounded
Manufacturing tolerance
+0,05
mm
Tolerance and axial dimension ±0,2 mm
Admissible wear 0,01 mm
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 102 – Gauge for checking the minimum inside diameter
of the conduit system after impact and resistance to heat tests
Key
X 12 mm ± 2 mm
1 3 mm steel plate
2 Optional locknut
3 Terminating conduit fitting secured to plate by tapped hole or by locknut on fitting thread
4 Conduit
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test
– 14 – IEC 61386-23:2021 RLV © IEC 2021
Annex A
(normative)
This annex of part 1 is applicable
Annex B
(normative)
This annex of part 1 is applicable
Annex A
(normative)
Classification coding for conduit systems
Annex A of IEC 61386-1:2008 is applicable.
Annex B
(normative)
Determination of material thickness
Annex B of IEC 61386-1:2008 is applicable.
Annex C
(normative)
Additional test requirements for conduit systems
already complying with IEC 61386-1:2008
Annex C of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
– 16 – IEC 61386-23:2021 RLV © IEC 2021
Addition:
Annex AA
(informative)
Calculation for minimum and maximum rate of increase of force for 10.2.4
The following information is provided to assist test engineers calculate the required rate of
increase of force vs time for compression test machines which have tolerances on the rate of
load application.
Calculations for minimum and maximum rate of increase of force for 10.2.4:
– minimum rate equals minimum force (Table 4) divided by maximum time (33 s);
– nominal rate equals nominal force (Table 4) divided by nominal time (30 s);
– maximum rate equals maximum force (Table 4 +4 %) divided by minimum time (27 s).
For 750 N force, this can be shown by Figure AA.1 as force (N) against time (s).
Key
Line 1. is maximum rate
Line 2. is minimum rate
Figure AA.1 – Graph showing force against time for 750 N force
For all force levels, the calculations are as given in Table AA.1.
Table AA.1 – Minimum and maximum rate of increase of force for 10.2.4
Compression Rate (N/s)
force
(N) Minimum Nominal Maximum
125 3,8 4,2 4,8
320 9,7 10,7 12,3
750 22,7 25,0 28,9
1 250 37,9 41,7 48,1
4 000 121,2 133,3 154,1
___________
IEC 61386-23 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
Systèmes de conduits pour la gestion du câblage –
Partie 23: Exigences particulières – Systèmes de conduits souples
– 2 – IEC 61386-23:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 General conditions for tests . 5
6 Classification . 5
7 Marking and documentation . 6
8 Dimensions. 6
9 Construction . 6
10 Mechanical properties. 6
11 Electrical properties . 8
12 Thermal properties . 8
13 Fire hazard . 8
14 External influences . 8
15 Electromagnetic compatibility . 8
Annex A (normative) Classification coding for conduit systems . 12
Annex B (normative) Determination of material thickness . 12
Annex C (normative) Additional test requirements for conduit systems already
complying with IEC 61386-1:2008 . 12
Annex AA (informative) Calculation for minimum and maximum rate of increase of
force for 10.2.4 . 13
Figure 101 – Flexing test apparatus . 9
Figure 102 – Gauge for checking the minimum inside diameter of the conduit system
after impact and resistance to heat tests . 10
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test . 11
Figure AA.1 – Graph showing force against time for 750 N force. 13
Table AA.1 – Minimum and maximum rate of increase of force for 10.2.4 . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
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.
International Standard IEC 61386-23 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 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Annex AA has been added to provide guidance on the application of a constantly
increasing force.
– 4 – IEC 61386-23:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
23A/952/FDIS 23A/957/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61386 series, published under the general title Conduit
systems for cable management, can be found on the IEC website.
This document is to be used in conjunction with IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017.
This document supplements or modifies the corresponding clauses of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017. Where a particular clause or subclause of IEC 61386-1:2008
and IEC 61386-1:2008/AMD1:2017 is not mentioned in this document, that clause or
subclause applies as far as is reasonable. Where this document states "addition",
"modification" or "replacement", the relevant text of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017 is to be adapted accordingly.
Subclauses, tables and figures which are in addition to those in IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017 are numbered starting with 101. Annexes which are additional
to those in IEC 61386-1:2008 and IEC 61386-1:2008/AMD1:2017 are lettered AA, BB, etc.
In this document, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
– Explanatory matter: in smaller roman type.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
1 Scope
Clause 1 of IEC 61386-1:2008 is applicable, except as follows:
Addition:
This part of IEC 61386 specifies the requirements for flexible conduit systems.
2 Normative references
Clause 2 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
IEC 61386-1:2008, Conduit systems for cable management – Part 1: General requirements
IEC 61386-1:2008/AMD1:2017
3 Terms and definitions
Clause 3 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
4 General requirements
Clause 4 of IEC 61386-1:2008 is applicable.
5 General conditions for tests
Clause 5 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
6 Classification
Clause 6 of IEC 61386-1:2008 is applicable, except as follows:
Classifications 6.1.3, 1; 6.1.3, 2 and 6.1.3, 3 are not applicable.
NOTE Flexible conduit systems according to 6.1.1, 1; 6.1.1, 2; 6.1.2, 1; 6.1.2, 2 and classification 1 from 6.2.1,
Table 1 are not allowed in France.
– 6 – IEC 61386-23:2021 © IEC 2021
7 Marking and documentation
Clause 7 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
7.1.101 The conduit shall be marked in accordance with 7.1 along its entire length at regular
intervals of preferably 1 m but not longer than 3 m. Where this is technically impractical, the
mark shall be on a label attached to the product at each end, or on the packaging.
Compliance is checked by inspection.
7.1.102 The manufacturer shall document or include in the packaging, the minimum inside
diameter, the minimum bend radius and the classification in accordance with Clause 6 for the
conduit system.
Compliance is checked by inspection of the documentation.
8 Dimensions
Replacement:
8.1 Threads shall comply with IEC 60423.
Compliance is checked by means of the gauges specified in IEC 60423.
8.2 The minimum inside diameter of the conduit system shall be as declared by the
manufacturer.
Compliance is checked by measurement.
9 Construction
Clause 9 of IEC 61386-1:2008 is applicable.
10 Mechanical properties
Clause 10 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
10.2 Compression test
Subclause 10.2 is applicable with the following addition:
10.2.4 Add the following note at the end of Subclause 10.2.4:
NOTE In order to achieve a uniformly increasing compression force, the force indicated in Table 4 is divided by
time; this value is the required rate per second to fulfil the requirement.
Example: For a test force of 750 N an increase of the test force of 25 N/s is required (750 divided by 30 equals 25).
Informative Annex AA gives detailed calculations including tolerances for time and force.
10.4 Bending test
Subclause 10.4 of IEC 61386-1:2008 is not applicable.
10.5 Flexing test
Addition:
10.5.101 An assembly consisting of a conduit with a terminating conduit fitting, assembled in
accordance with the manufacturer's instructions, shall be subjected to a flexing test by means
of the apparatus shown in Figure 101.
10.5.102 The test shall be made on six samples of conduit of an appropriate length. Three of
the samples shall be tested at the minimum declared temperature for transport, application
and installation as given in Table 1 with a tolerance of ±2 °C. The other three samples shall
be tested at the maximum declared application and installation temperature as given in
Table 2 with a tolerance of ±2 °C.
A manufacturer may declare that a flexible conduit is suitable for transport and installation
according to Table 1 but may only be suitable for flexing at ambient temperature as a
minimum. In this case the test shall be carried out at (20 ± 2) °C and the third digit of the
classification code shall be X. The manufacturer shall clearly declare in its literature both the
minimum transport and installation temperature in accordance with Table 1, the minimum
application temperature which is ambient and the maximum installation and application
temperature in accordance with Table 2.
10.5.103 The sample shall be fixed to the oscillating member by means of the terminating
conduit fitting as shown in Figure 101, so that when the conduit is at the middle of its travel,
the axis of the conduit is vertical and passes through the axis of the oscillation. The apparatus
with the sample shall be conditioned for 2 h or until the sample has attained the declared
temperature, whichever period is the longer.
10.5.104 The oscillating member shall be moved backwards and forwards through a total
angle of (180 ± 5)° divided equally about the vertical axis. The assembly shall be subjected to
5 000 flexings at a rate of (40 ± 5) flexings per minute. A flexing constitutes, starting from the
vertical position, one continuous cycle of movement of essentially sinusoidal forms.
10.5.105 After the test, the sample shall show no cracks visible to normal or corrected vision
without magnification and it shall be possible to pass the appropriate gauge, as shown in
Figure 102, through the sample under its own weight and without any initial speed.
10.6 Collapse test
Subclause 10.6 of IEC 61386-1:2008 is not applicable.
10.7 Tensile test
Subclause 10.7 of IEC 61386-1:2008 is applicable, except as follows:
10.7.3 Replacement:
For conduit systems where tensile strength is not declared, the tensile strength of the joint
shall comply with classification 1 in Table 6.
– 8 – IEC 61386-23:2021 © IEC 2021
11 Electrical properties
Clause 11 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
11.2 Bonding test
Replacement:
A sample of a conduit and terminating conduit fitting shall be assembled in accordance with
the manufacturer's instructions and mounted as shown in Figure 103. A current of 25 A,
having a frequency of 50 Hz to 60 Hz, derived from an AC source having a no-load voltage
+5
not exceeding 12 V, shall be passed through the assembly for ( 60 ) s. Then the voltage
drop shall be measured between the points shown in Figure 103 and the resistance calculated
from the current and this voltage drop.
The resistance shall not exceed 0,05 Ω.
12 Thermal properties
Clause 12 of IEC 61386-1:2008 is applicable, except as follows:
12.3 Replacement:
The load is then removed and immediately after its removal it shall be possible to pass the
appropriate gauge, in accordance with Figure 102, through the conduit under its own weight
and without any initial speed, with the sample in the vertical position.
13 Fire hazard
Clause 13 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
14 External influences
Clause 14 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
15 Electromagnetic compatibility
Clause 15 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
Addition:
Key
A Conduit
B Terminating fitting
d Outside diameter of conduit (A)
s
d Inside diameter of support block: 1,1 × d
n s
R Radius of support block: 0,5 × d
,
R Radius of support block: 0,25 × d
2 s
Y Minimum bend radius, declared by the manufacturer
Z 1,5 × Y
1 Oscillating member
2 Guide support block
3 Plan view of guide support block
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 101 – Flexing test apparatus
– 10 – IEC 61386-23:2021 © IEC 2021
D 80 % of the manufacturer's declared minimum inside diameter of
the conduit system
Material Steel, hardened and polished, edges slightly rounded
Manufacturing tolerance
+0,05
mm
Tolerance and axial dimension ±0,2 mm
Admissible wear 0,01 mm
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 102 – Gauge for checking the minimum inside diameter
of the conduit system after impact and resistance to heat tests
Key
X 12 mm ± 2 mm
1 3 mm steel plate
2 Optional locknut
3 Terminating conduit fitting secured to plate by tapped hole or by locknut on fitting thread
4 Conduit
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test
– 12 – IEC 61386-23:2021 © IEC 2021
Annex A
(normative)
Classification coding for conduit systems
Annex A of IEC 61386-1:2008 is applicable.
Annex B
(normative)
Determination of material thickness
Annex B of IEC 61386-1
...
IEC 61386-23 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
Systèmes de conduits pour la gestion du câblage –
Partie 23: Exigences particulières – Systèmes de conduits souples
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IEC 61386-23 ®
Edition 2.0 2021-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Conduit systems for cable management –
Part 23: Particular requirements – Flexible conduit systems
Systèmes de conduits pour la gestion du câblage –
Partie 23: Exigences particulières – Systèmes de conduits souples
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.120.10 ISBN 978-2-8322-1061-7
– 2 – IEC 61386-23:2021 © IEC 2021
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 5
5 General conditions for tests . 5
6 Classification . 5
7 Marking and documentation . 6
8 Dimensions. 6
9 Construction . 6
10 Mechanical properties. 6
11 Electrical properties . 8
12 Thermal properties . 8
13 Fire hazard . 8
14 External influences . 8
15 Electromagnetic compatibility . 8
Annex A (normative) Classification coding for conduit systems . 12
Annex B (normative) Determination of material thickness . 12
Annex C (normative) Additional test requirements for conduit systems already
complying with IEC 61386-1:2008 . 12
Annex AA (informative) Calculation for minimum and maximum rate of increase of
force for 10.2.4 . 13
Figure 101 – Flexing test apparatus . 9
Figure 102 – Gauge for checking the minimum inside diameter of the conduit system
after impact and resistance to heat tests . 10
Figure 103 – Assembly of conduit and terminating conduit fitting for bonding test . 11
Figure AA.1 – Graph showing force against time for 750 N force. 13
Table AA.1 – Minimum and maximum rate of increase of force for 10.2.4 . 14
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
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.
International Standard IEC 61386-23 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 2002. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) Annex AA has been added to provide guidance on the application of a constantly
increasing force.
– 4 – IEC 61386-23:2021 © IEC 2021
The text of this International Standard is based on the following documents:
FDIS Report on voting
23A/952/FDIS 23A/957/RVD
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 61386 series, published under the general title Conduit
systems for cable management, can be found on the IEC website.
This document is to be used in conjunction with IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017.
This document supplements or modifies the corresponding clauses of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017. Where a particular clause or subclause of IEC 61386-1:2008
and IEC 61386-1:2008/AMD1:2017 is not mentioned in this document, that clause or
subclause applies as far as is reasonable. Where this document states "addition",
"modification" or "replacement", the relevant text of IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017 is to be adapted accordingly.
Subclauses, tables and figures which are in addition to those in IEC 61386-1:2008 and
IEC 61386-1:2008/AMD1:2017 are numbered starting with 101. Annexes which are additional
to those in IEC 61386-1:2008 and IEC 61386-1:2008/AMD1:2017 are lettered AA, BB, etc.
In this document, the following print types are used:
– Requirements proper: in roman type.
– Test specifications: in italic type.
– Explanatory matter: in smaller roman type.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
CONDUIT SYSTEMS FOR CABLE MANAGEMENT –
Part 23: Particular requirements – Flexible conduit systems
1 Scope
Clause 1 of IEC 61386-1:2008 is applicable, except as follows:
Addition:
This part of IEC 61386 specifies the requirements for flexible conduit systems.
2 Normative references
Clause 2 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
IEC 61386-1:2008, Conduit systems for cable management – Part 1: General requirements
IEC 61386-1:2008/AMD1:2017
3 Terms and definitions
Clause 3 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
4 General requirements
Clause 4 of IEC 61386-1:2008 is applicable.
5 General conditions for tests
Clause 5 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
6 Classification
Clause 6 of IEC 61386-1:2008 is applicable, except as follows:
Classifications 6.1.3, 1; 6.1.3, 2 and 6.1.3, 3 are not applicable.
NOTE Flexible conduit systems according to 6.1.1, 1; 6.1.1, 2; 6.1.2, 1; 6.1.2, 2 and classification 1 from 6.2.1,
Table 1 are not allowed in France.
– 6 – IEC 61386-23:2021 © IEC 2021
7 Marking and documentation
Clause 7 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except as
follows:
Addition:
7.1.101 The conduit shall be marked in accordance with 7.1 along its entire length at regular
intervals of preferably 1 m but not longer than 3 m. Where this is technically impractical, the
mark shall be on a label attached to the product at each end, or on the packaging.
Compliance is checked by inspection.
7.1.102 The manufacturer shall document or include in the packaging, the minimum inside
diameter, the minimum bend radius and the classification in accordance with Clause 6 for the
conduit system.
Compliance is checked by inspection of the documentation.
8 Dimensions
Replacement:
8.1 Threads shall comply with IEC 60423.
Compliance is checked by means of the gauges specified in IEC 60423.
8.2 The minimum inside diameter of the conduit system shall be as declared by the
manufacturer.
Compliance is checked by measurement.
9 Construction
Clause 9 of IEC 61386-1:2008 is applicable.
10 Mechanical properties
Clause 10 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
10.2 Compression test
Subclause 10.2 is applicable with the following addition:
10.2.4 Add the following note at the end of Subclause 10.2.4:
NOTE In order to achieve a uniformly increasing compression force, the force indicated in Table 4 is divided by
time; this value is the required rate per second to fulfil the requirement.
Example: For a test force of 750 N an increase of the test force of 25 N/s is required (750 divided by 30 equals 25).
Informative Annex AA gives detailed calculations including tolerances for time and force.
10.4 Bending test
Subclause 10.4 of IEC 61386-1:2008 is not applicable.
10.5 Flexing test
Addition:
10.5.101 An assembly consisting of a conduit with a terminating conduit fitting, assembled in
accordance with the manufacturer's instructions, shall be subjected to a flexing test by means
of the apparatus shown in Figure 101.
10.5.102 The test shall be made on six samples of conduit of an appropriate length. Three of
the samples shall be tested at the minimum declared temperature for transport, application
and installation as given in Table 1 with a tolerance of ±2 °C. The other three samples shall
be tested at the maximum declared application and installation temperature as given in
Table 2 with a tolerance of ±2 °C.
A manufacturer may declare that a flexible conduit is suitable for transport and installation
according to Table 1 but may only be suitable for flexing at ambient temperature as a
minimum. In this case the test shall be carried out at (20 ± 2) °C and the third digit of the
classification code shall be X. The manufacturer shall clearly declare in its literature both the
minimum transport and installation temperature in accordance with Table 1, the minimum
application temperature which is ambient and the maximum installation and application
temperature in accordance with Table 2.
10.5.103 The sample shall be fixed to the oscillating member by means of the terminating
conduit fitting as shown in Figure 101, so that when the conduit is at the middle of its travel,
the axis of the conduit is vertical and passes through the axis of the oscillation. The apparatus
with the sample shall be conditioned for 2 h or until the sample has attained the declared
temperature, whichever period is the longer.
10.5.104 The oscillating member shall be moved backwards and forwards through a total
angle of (180 ± 5)° divided equally about the vertical axis. The assembly shall be subjected to
5 000 flexings at a rate of (40 ± 5) flexings per minute. A flexing constitutes, starting from the
vertical position, one continuous cycle of movement of essentially sinusoidal forms.
10.5.105 After the test, the sample shall show no cracks visible to normal or corrected vision
without magnification and it shall be possible to pass the appropriate gauge, as shown in
Figure 102, through the sample under its own weight and without any initial speed.
10.6 Collapse test
Subclause 10.6 of IEC 61386-1:2008 is not applicable.
10.7 Tensile test
Subclause 10.7 of IEC 61386-1:2008 is applicable, except as follows:
10.7.3 Replacement:
For conduit systems where tensile strength is not declared, the tensile strength of the joint
shall comply with classification 1 in Table 6.
– 8 – IEC 61386-23:2021 © IEC 2021
11 Electrical properties
Clause 11 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable, except
as follows:
11.2 Bonding test
Replacement:
A sample of a conduit and terminating conduit fitting shall be assembled in accordance with
the manufacturer's instructions and mounted as shown in Figure 103. A current of 25 A,
having a frequency of 50 Hz to 60 Hz, derived from an AC source having a no-load voltage
+5
not exceeding 12 V, shall be passed through the assembly for ( 60 ) s. Then the voltage
drop shall be measured between the points shown in Figure 103 and the resistance calculated
from the current and this voltage drop.
The resistance shall not exceed 0,05 Ω.
12 Thermal properties
Clause 12 of IEC 61386-1:2008 is applicable, except as follows:
12.3 Replacement:
The load is then removed and immediately after its removal it shall be possible to pass the
appropriate gauge, in accordance with Figure 102, through the conduit under its own weight
and without any initial speed, with the sample in the vertical position.
13 Fire hazard
Clause 13 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
14 External influences
Clause 14 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
15 Electromagnetic compatibility
Clause 15 of IEC 61386-1:2008 and of IEC 61386-1:2008/AMD1:2017 are applicable.
Addition:
Key
A Conduit
B Terminating fitting
d Outside diameter of conduit (A)
s
d Inside diameter of support block: 1,1 × d
n s
R Radius of support block: 0,5 × d
,
R Radius of support block: 0,25 × d
2 s
Y Minimum bend radius, declared by the manufacturer
Z 1,5 × Y
1 Oscillating member
2 Guide support block
3 Plan view of guide support block
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 101 – Flexing test apparatus
– 10 – IEC 61386-23:2021 © IEC 2021
D 80 % of the manufacturer's declared minimum inside diameter of
the conduit system
Material Steel, hardened and polished, edges slightly rounded
Manufacturing tolerance
+0,05
mm
Tolerance and axial dimension ±0,2 mm
Admissible wear 0,01 mm
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 102 – Gauge for checking the minimum inside diameter
of the conduit system after impact and resistance to heat tests
Key
X 12 mm ± 2 mm
1 3 mm steel plate
2 Optional locknut
3 Terminating conduit fitting secured to plate by tapped hole or by locknut on fitting thread
4 Conduit
NOTE This drawing is not intended to govern design except as regards the dimensions shown.
Figure 103 – Assembly of conduit and
...
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