IEC 61084-2-2:2017

Cable trunking systems and cable ducting systems for electrical installations - Part 2-2: Particular requirements - Cable trunking systems and cable ducting systems intended for mounting underfloor, flushfloor, or onfloor

IEC 61084-2-2:2017 specifies requirements and tests for cable trunking systems (CTS) and cable ducting systems (CDS) intended for the accommodation, and where necessary for the electrically protective separation, of insulated conductors, cables and possibly other electrical equipment in electrical and/or communication systems installations. The maximum voltage of these installations is 1 000 V AC and 1 500 V DC.
These systems are intended for mounting underfloor, flushfloor or onfloor.
This document does not apply to CTS/CDS which are intended to be fixed to the wall and supported by the floor.
This document does not apply to conduit systems, cable tray systems, cable ladder systems, power track systems or equipment covered by other standards.
This second edition cancels and replaces the first edition published in 2003. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
- classification;
- construction;
- mechanical and electrical properties.
This International standard is to be used in conjunction with IEC 61084-1:2017.

Systèmes de goulottes et systèmes de conduits-profilés pour installations électriques - Partie 2-2: Exigences particulières - Systèmes de goulottes et systèmes de conduits-profilés prévus pour être montés en sous-sol, encastrés dans le sol, ou sur le sol

IEC 61084-2-2:2017 spécifie les exigences et les essais pour les systèmes de goulottes (SG) et les systèmes de conduits-profilés (SCP) destinés au logement de conducteurs isolés, câbles et éventuels autres équipements électriques et, si nécessaire, à leur séparation de protection électrique, dans des installations électriques et/ou de systèmes de communication. La tension maximale de ces installations est de 1 000 V en courant alternatif et 1 500 V en courant continu.
Ces systèmes sont destinés à être montés sous le sol, encastrés dans le sol, ou sur le sol.
Le présent document ne s’applique pas aux SG/SCP prévus pour être fixés à un mur et soutenus par le sol.
Le présent document ne s’applique pas aux systèmes de conduits, systèmes de chemins de câble, systèmes d’échelles à câble, systèmes de canalisations préfabriquées ou aux équipements couverts par d’autres normes.
Cette deuxième édition annule et remplace la première édition parue en 2003. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
- classification;
- construction;
- propriétés mécaniques et électriques.
Cette Norme internationale doit être utilisée conjointement avec l’IEC 61084-1:2017.

General Information

• Status: Published
• Publication Date: 06-Mar-2024
• ICS: 29.060.01 - Electrical wires and cables in general
• ICS: 29.120.10 - Conduits for electrical purposes
• Technical Committee: SC 23A - Cable management systems
• Drafting Committee: MT 5 - TC 23/SC 23A/MT 5
• Current Stage: PPUB - Publication issued
• Start Date: 22-Mar-2017
• Completion Date: 07-Apr-2017

Relations

• Amended By: IEC 61084-2-2:2017/AMD1:2024 - Amendment 1 - Cable trunking systems and cable ducting systems for electrical installations - Part 2-2: Particular requirements - Cable trunking systems and cable ducting systems intended for mounting underfloor, flushfloor, or onfloor
• Effective Date: 05-Sep-2023
• Revises: IEC 61084-2-2:2003 - Cable trunking and ducting systems for electrical installations - Part 2-2: Particular requirements - Cable trunking systems and cable ducting systems intended for underfloor and flushfloor installations
• Effective Date: 05-Sep-2023

Overview

IEC 61084-2-2:2017 is an international standard published by the International Electrotechnical Commission (IEC). It defines the particular requirements for cable trunking systems (CTS) and cable ducting systems (CDS) intended for electrical installations mounted underfloor, flushfloor, or onfloor. These systems accommodate and protect insulated electrical conductors, cables, and other electrical devices commonly used in electrical and communication installations with voltages up to 1,000 V AC and 1,500 V DC.

This second edition enhances the previous 2003 version by updating system classification, construction requirements, and mechanical and electrical properties to reflect advances and industry best practices. IEC 61084-2-2:2017 is designed to be used alongside IEC 61084-1:2017, which covers general requirements for cable management systems.

This standard specifically excludes cable trunking or ducting systems mounted on walls or supported by floors, as well as other cable management types such as conduit, cable trays, cable ladders, or power tracks.

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Key Topics

• Scope and Purpose
  Specifies performance requirements and tests for CTS and CDS used for underfloor, flushfloor, or onfloor mounting, ensuring safe accommodation and electrically protective separation of cables.

• Classification
  Systems are categorized based on their mounting type, mechanical strength, and electrical properties to meet different installation environments and load conditions.

• Construction Requirements
  Construction guidelines ensure systems provide adequate protection against mechanical forces encountered in floor installations, allow easy cable access, and facilitate installation and maintenance.

• Mechanical Properties
  Includes detailed mechanical load tests (e.g., hammer tests, load-bearing capacities) to verify robustness and durability for floor-mounted applications.

• Electrical Properties
  Requirements ensure electrical safety, insulation characteristics, and proper conduction to avoid interference or hazards.

• Thermal and Fire Hazard Considerations
  Specifies criteria related to heat resistance, fire performance, and external environmental influences to meet safety regulations.

• Marking and Documentation
  Mandates clear labeling and proper documentation to facilitate identification, installation, and compliance verification.

• Testing and Compliance
  Details test conditions, including environmental testing and electromagnetic compatibility, to ensure long-term reliability.

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Applications

• Underfloor Cable Installation
  Ideal for embedding cable systems beneath floors, protecting cables from mechanical stress and environmental factors while maintaining easy access for upgrades or repairs.

• Flushfloor Cable Management
  Suitable for installations where cable trunking or ducting is integrated into floor surfaces, optimizing space and reducing tripping hazards.

• Onfloor Cable Systems
  Used when cable ducts or trunkings are mounted directly above floor surfaces, offering flexible and accessible cable routing solutions in industrial or commercial settings.

• Electrical and Communication Systems
  Supports installations in diverse environments such as offices, commercial buildings, data centers, and industrial plants with a focus on safety, durability, and regulatory compliance.

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Related Standards

• IEC 61084-1:2017 – General requirements for cable trunking and ducting systems covering terminology, basic construction, and application rules complementing this particular part.

• IEC 60068 Series – Environmental testing standards (including parts 2-60 and 2-75 referenced) addressing corrosion resistance and mechanical impact tests relevant for cable management systems.

• Other IEC Cable Management Standards – Standards related to conduit systems, cable trays, and ladder systems, applicable where cable trunking and ducting are not suitable.

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Why IEC 61084-2-2:2017 Matters

Ensuring that cable trunking and ducting systems used in floor-mounted installations meet international safety, performance, and quality standards is critical to protecting electrical infrastructure, minimizing installation risks, and facilitating compliance with electrical codes worldwide. This standard supports engineers, designers, manufacturers, and installers in achieving reliable, consistent, and safe floor cable management solutions for various electrical installations.

Standards Content (Sample)

IEC 61084-2-2 ®
Edition 2.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable trunking systems and cable ducting systems for electrical installations –
Part 2-2: Particular requirements – Cable trunking systems and cable ducting
systems intended for mounting underfloor, flushfloor, or onfloor

Systèmes de goulottes et systèmes de conduits-profilés pour installations
électriques –
Partie 2-2: Exigences particulières – Systèmes de goulottes et systèmes de
conduits-profilés prévus pour être montés en sous-sol, encastrés dans le sol,
ou sur le sol
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IEC 61084-2-2 ®
Edition 2.0 2017-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable trunking systems and cable ducting systems for electrical installations –

Part 2-2: Particular requirements – Cable trunking systems and cable ducting

systems intended for mounting underfloor, flushfloor, or onfloor

Systèmes de goulottes et systèmes de conduits-profilés pour installations

électriques –
Partie 2-2: Exigences particulières – Systèmes de goulottes et systèmes de

conduits-profilés prévus pour être montés en sous-sol, encastrés dans le sol,

ou sur le sol
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.01; 29.120.10 ISBN 978-2-8322-4119-6

– 2 – IEC 61084-2-2:2017 © IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 General conditions for tests . 7
6 Classification . 7
7 Marking and documentation . 7
8 Dimensions. 8
9 Construction . 8
10 Mechanical properties. 9
11 Electrical properties . 14
12 Thermal properties . 14
13 Fire hazard . 14
14 External influences . 14
15 Electromagnetic compatibility . 15
Annex A (informative) Types of cable trunking systems (CTS) and cable ducting
systems (CDS) . 27
Annex B (normative) CTS/CDS IK code . 28
Annex AA (normative) Mechanical load tests . 29
Bibliography . 31

Figure 101 – Types and application of CTS/CDS for underfloor, flushfloor or onfloor
installations . 16
Figure 102 – Examples of trunking and ducting installations . 17
Figure 103 – Example of underfloor embedded CDS according to 3.101 . 18
Figure 104 – Example of flushfloor CTS according to 3.102 . 19
Figure 105 – Example of onfloor CTS according to 3.103 . 20
Figure 106 – Principles for arrangement . 21
Figure 107 – Examples for arrangement . 22
Figure 108 – Load test set-up for CTS/CDS in accordance with 10.5.103 . 24
Figure 109 – Load test set-up for CTS/CDS in accordance with 10.5.104 . 26

Table A.2 – Types of CTS and CDS for floor installation . 27
Table AA.1 – Mechanical load tests . 29

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE TRUNKING SYSTEMS AND CABLE DUCTING
SYSTEMS FOR ELECTRICAL INSTALLATIONS –

Part 2-2: Particular requirements – Cable trunking systems and cable
ducting systems intended for mounting underfloor, flushfloor, or onfloor

FOREWORD
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patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 61084-2-2 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 2003. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• classification;
• construction;
• mechanical and electrical properties.
This International standard is to be used in conjunction with IEC 61084-1:2017.

– 4 – IEC 61084-2-2:2017 © IEC 2017
The text of this standard is based on the following documents:
FDIS Report on voting
23A/828/FDIS 23A/836/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 part of the IEC 61084 series supplements or modifies the corresponding clauses of
IEC 61084-1:2017 as follows:
– where no particular clause or subclause of IEC 61084-1 is mentioned, the corresponding
clause or subclause of IEC 61084-1 applies as far as it is reasonable;
– where “addition” or “replacement” is stated, the relevant text of IEC 61084-1 is to be
adapted accordingly;
– subclauses, figures and tables which are additional to those in IEC 61084-1 are numbered
starting from 101.
In this standard, the following print types are used:
– requirements and definitions: roman type;
– compliance statements: italic type.
A list of all parts in the IEC 61084 series, published under the general title Cable trunking and
cable ducting systems for electrical installations, 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 website under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates
that it contains colours which are considered to be useful for the correct
understanding of its contents. Users should therefore print this document using a
colour printer.
CABLE TRUNKING SYSTEMS AND CABLE DUCTING
SYSTEMS FOR ELECTRICAL INSTALLATIONS –

Part 2-2: Particular requirements – Cable trunking systems and cable
ducting systems intended for mounting underfloor, flushfloor, or onfloor

1 Scope
This part of the IEC 61084 series specifies requirements and tests for cable trunking systems
(CTS) and cable ducting systems (CDS) intended for the accommodation, and where
necessary for the electrically protective separation, of insulated conductors, cables and
possibly other electrical equipment in electrical and/or communication systems installations.
The maximum voltage of these installations is 1 000 V AC and 1 500 V DC.
These systems are intended for mounting underfloor, flushfloor or onfloor.
This document does not apply to CTS/CDS which are intended to be fixed to the wall and
supported by the floor.
This document does not apply to conduit systems, cable tray systems, cable ladder systems,
power track systems or equipment covered by other standards.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
IEC 60068-2-60:2015, Environmental testing – Part 2-60: Tests – Test Ke: Flowing mixed gas
corrosion test
IEC 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 61084-1:2017, Cable trunking systems and cable ducting systems for electrical
installations – Part 1: General requirements
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.1 Replace Note 1 to entry by:
Note 1 to entry: Different types of CTS are shown in Figure 101 and explained in Annex A.
3.2 Replace Note 1 to entry by:
Note 1 to entry: Different types of CDS are shown in Figure 101 and explained in Annex A.

– 6 – IEC 61084-2-2:2017 © IEC 2017
3.3 Addition:
f) service unit
Replace Note 1 to entry by:
Note 1 to entry: A system does not necessarily include all system components a) to f). Different combinations of
system components can be used.
Addition:
3.101
underfloor CTS/CDS
CTS/CDS whose components, except access units and service units, are intended to be
mounted within or under a floor and in normal use are not exposed to traffic loads
Note 1 to entry: See Figures 102a), 102c) and 103.
3.102
flushfloor CTS/CDS
CTS/CDS whose components, except access units and service units, are intended to be
mounted flush such that the height above the upper level of the floor covering is not more
than 4 mm
Note 1 to entry: The upper surface is considered to be exposed to traffic loads.
Note 1 to entry: See Figures 102b) and 104.
3.103
onfloor CTS/CDS
CTS/CDS whose components are intended to be mounted on a floor such that the height
above the upper level of the floor covering is greater than 4 mm
Note 1 to entry: The upper surface is considered to be exposed to traffic loads.
Note 2 to entry: See Figures 102d) and 105.
3.104
access unit
system component intended to provide access to insulated conductors or cables
3.105
service unit
system component intended for incorporation of one or more apparatus either directly or by
means of one or more apparatus mounting devices
3.106
service unit
service unit which has no cables connected to electrical equipment
3.107
service unit
service unit which has cables connected to electrical equipment
4 General requirements
This clause of Part 1 is applicable.

5 General conditions for tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable, except as follows:
Additional subclauses:
6.101 According to floor treatment
6.101.1 CTS/CDS for dry-treatment of floor
6.101.2 CTS/CDS for wet-treatment of floor when the service unit is not in use
6.101.3 CTS/CDS for wet-treatment of floor when the service unit is in use
6.102 According to resistance to vertical load applied through small surface area
6.102.1 CTS/CDS for 500 N
6.102.2 CTS/CDS for 750 N
6.102.3 CTS/CDS for 1 000 N
6.102.4 CTS/CDS for 1 500 N
6.102.5 CTS/CDS for 2 000 N
6.102.6 CTS/CDS for 2 500 N
6.102.7 CTS/CDS for 3 000 N
6.103 Optional classification according to resistance to vertical load applied through
large surface area
6.103.1 CTS/CDS for 2 000 N
6.103.2 CTS/CDS for 3 000 N
6.103.3 CTS/CDS for 5 000 N
6.103.4 CTS/CDS for 10 000 N
6.103.5 CTS/CDS for 15 000 N
7 Marking and documentation
This clause of Part 1 is applicable, except as follows:
Additional subclauses:
7.101 Access units and service units of systems classified according to 6.101.1 shall be
marked that they are suitable for dry treatment of floor only. The marking shall be visible by
the user which may be achieved by opening the cover.
NOTE This marking can be in the form of text or graphic.

– 8 – IEC 61084-2-2:2017 © IEC 2017
7.102 Service units shall be marked with a warning about the potential damage to electrical
accessories by closing the cover. The marking shall be visible by the user which may be
achieved by opening the cover.
NOTE This marking can be in the form of text or graphic.
7.103 Compliance with 7.101 and 7.102 is checked by inspection.
8 Dimensions
This clause of Part 1 is applicable, except as follows:
Addition:
There are no dimensions requirements.
9 Construction
This clause of Part 1 is applicable, except as follows:
Addition:
9.101 Access covers of underfloor, flushfloor and onfloor CTS/CDS, which in normal use are
subjected to external mechanical loads, shall resist movement and unintentional opening.
Compliance is checked by inspection and by the tests of 10.5.
9.102 Service units installed flushfloor shall protect the installed electrical apparatus and the
plug from direct impact when in use. This protection shall be effective and shall not cause
damage to the outgoing cable.
Compliance is checked by inspection and by the tests of 10.3.
9.103 It shall be possible to securely fix:
– service units to the system;
– electrical apparatus to the service units.
Compliance is checked by the tests of 10.3 and 10.5.1.
9.104 When the service unit is not in use, it shall be possible to close openings intended for
the passage of cables.
Openings, when in use, in underfloor and flushfloor CTS/CDS, for the passage of cables,
need not be closed if one of its dimensions is less than 20 mm in one direction.
Compliance is checked by inspection and measurement.
9.105 Underfloor and flushfloor CTS/CDS which in normal use are embedded in screed
material shall be protected against ingress of the screed material.
Openings leading to the interior of underfloor and flushfloor CTS/CDS which in normal use,
are located below the upper level of the floor without covering, shall not be wider than 7 mm
in one direction.
Compliance is checked by inspection and measurement.
NOTE The dimensioning of the maximum width of the clear opening is based on the grain size of cementitious
screeds.
9.106 CTS/CDS declared according to 6.101.2 and 6.101.3 shall avoid water coming into
contact with insulated conductors and live parts during wet-treatment of floor by one or a
combination of the following methods which may vary within the system:
– method 1: ensuring by design that water does not come into contact with insulated
conductors and live parts when the water level is 10 mm above the upper level of the floor
covering;
– method 2: providing an IP rating not less than IPX4;
– method 3: providing manufacturer's instructions which require that insulated conductors
and live parts are positioned not less than 10 mm above the upper level of the floor
covering.
For method 1, compliance is checked by measurement. For method 2, compliance is checked
by the test of 14.1.2. For method 3, compliance is checked by inspection.
9.107 Access cover of service unit, if any, shall withstand repeated opening and closing as
in normal use.
Compliance is checked by 100 cycles of opening and closing of the access cover.
After the test there shall be no damage to impair the further use of the access cover.
9.108 Additional requirements for service units intended to be installed onfloor are given in
IEC 61084-2-4:2017.
10 Mechanical properties
This clause of Part 1 is applicable, except as follows:
10.1 Mechanical strength
Replacement:
Underfloor, flushfloor and onfloor CTS/CDS shall have adequate mechanical strength.
Compliance is checked by the tests specified in 10.3 and 10.5 according to Annex AA.
10.2 Cable support test
Not applicable.
10.3 Impact test
10.3.2 Impact test for installation and application
Additional subclauses:
10.3.2.101 Systems components only intended to be mounted underfloor are not tested. The
test is carried out on an assembly made of one or more trunking lengths or ducting lengths
with the relevant system component, if any, to fulfil the various functions of the system and
prepared according to the manufacturer’s instructions. More than one assembly may be

– 10 – IEC 61084-2-2:2017 © IEC 2017
necessary to fulfil the various functions of the system. In each direction, the length L of
trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
250 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a rigid smooth support such as a plywood board 16 mm thick,
with a 50 mm minimum spacing between the assembly and the edge of the support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
Other system components can be included to prevent movements. These system components
are the system components to terminate the trunking length or ducting length, if any. When
there is no such system component, a system component chosen by the manufacturer is
used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 of Part 1 with a tolerance of ±2 °C for
(168 ± 4) h continuously.
10.3.2.102 The impact test apparatus according to Clause 4 of IEC 60068-2-75:2014, is
mounted on a solid wall or structure providing sufficient support.
The samples are placed in a cabinet at the temperature declared according to Table 2 with a
tolerance of ±2 °C.
10.3.2.103 After 2 h, each sample is, in turn, removed from the cabinet and immediately
placed in position in the impact test apparatus.
At 12 s ± 2 s after the removal of the sample from the cabinet the hammer is allowed to fall so
that an impact is applied as far as possible perpendicular to the accessible region of the
sample likely to be the weakest. Compliance with impact applied before 10 s provides also
compliance with this test of the standard.
NOTE 1 The region likely to be the weakest can be on the relevant system component but can also be on a
trunking length or a ducting length.
No impact is applied to knockouts, membranes and the like.
No impact is applied within 50 mm of any open extremity of the sample.
NOTE 2 When another system component has been included at an extremity of the sample to prevent
movements, this extremity is still considered open.
Instead of placing the samples in a cabinet and applying the impact at 12 s ± 2 s after the
removal of the sample from the cabinet, it is allowed to apply the impact in a climatic chamber
at the temperature declared according to Table 2 with a tolerance of ±2 °C on samples placed
at this temperature for 2 h. Compliance in the climatic chamber is sufficient. In case of failure
in the climatic chamber, compliance using the cabinet provides compliance with the standard.
10.3.2.104 After the test:
– the assemblies shall show no cracks or similar damage visible to normal or corrected
vision without magnification, and

– the assemblies shall remain intact, and
– the service unit cover shall be in a position
such that safety is not impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the impacted samples to check
that the declared degree of protection against access to hazardous parts is maintained. The
declared degree of protection against access to hazardous parts is either the additional letter
directly declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of
protection against access to hazardous parts indirectly declared by the manufacturer
according 6.7.1 of Part 1.
NOTE Any cracks in internal dividers which are not likely to impair electrical safety or use are ignored. Electrical
safety can be impaired when the impact creates a sharp edge on a partition which can damage insulated
conductors or cables (see 9.1 of Part 1)
10.4 Linear deflection test
Not applicable.
10.5 External load test
Additional subclauses:
10.5.101 Underfloor CTS/CDS, flushfloor CTS/CDS and onfloor CTS/CDS shall have
sufficient mechanical strength against external mechanical loads likely to occur during
transport, storage, installation and normal use.
Compliance is checked by the tests of 10.5.102, 10.5.103 and 10.5.104.
Any part for temporary use only during the installation phase does not need to comply with
these tests but may be included for the test of 10.5.102 to allow compliance of other parts.
A summary of tests is given in Annex AA.
10.5.102 Load test for installation
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a horizontal rigid smooth support such as a plywood board
16 mm thick, with a 50 mm minimum spacing between the assembly and the edge of the
support.
NOTE 2 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.
Examples for arrangement are shown in Figure 107.

– 12 – IEC 61084-2-2:2017 © IEC 2017
Before the test non-metallic system components and composite components are aged at the
temperature declared according to Table 3 with a tolerance of ±2 °C for (168 ± 4) h
continuously.
A vertical force is applied centrally for 120 s ± 5 s to a steel cube of 50 mm ±0,5 mm with an
edge radius of approximately 1 mm.
The cube is placed approximately in the middle of the length of the sample and in the most
unfavourable position in the width of the sample. In the case of multi-compartment CTS/CDS
whose partition(s) provide support, the middle of the largest compartment is selected.
To allow for settlement of the sample, a pre-load of 25 N ± 5 N is applied and then the
measurement apparatus is calibrated to zero.
For the test of CTS/CDS intended to be installed underfloor under a raised floor a force of
250 N (+ 10 N, 0) is applied.
For the test of CDS intended to be embedded underfloor and CTS/CDS intended to be
installed flushfloor a force of 750 N (+ 30 N, 0) is applied except on parts of which the cover
remains visible and above the floor level during the whole installation phase for which a force
of 250 N (+ 10 N, 0) is applied.
During the test the vertical displacement of the cube shall be less than 25 mm.
Cracks are allowed but the maximum vertical displacement of the cube shall not be exceeded.
10.5.103 Load test for application – Force applied through small surface area
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a horizontal rigid smooth support such as a plywood board
16 mm thick, with a 50 mm minimum spacing between the assembly and the edge of the
support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
NOTE 3 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 with a tolerance of ± 2°C for (168 ± 4) h
continuously.
The surface of the sample which can be exposed to traffic is loaded with the force declared
according to 6.102.
A vertical force is applied through a steel cylinder of 13,3 mm ± 0,1 mm diameter with an edge
radius of 1 mm providing a contact surface of approximately 1 cm with a minimum length of
30 mm (Figure 108).
The cylinder is placed approximately in the middle of the length of the sample and in the most
unfavourable position in the width of the sample. In the case of multi-compartment CTS/CDS
whose partition(s) provide support, the middle of the largest compartment is selected.
To allow for settlement of the sample, a pre-load of 50 N ± 10 N is applied and then the
measurement apparatus is calibrated to zero.
The force is gradually increased up to the value declared according to 6.102 with a tolerance
(+ 4 %, 0) over 15 s ± 5 s and maintained for 60 s ± 1 s.
During the test the samples shall show no deflection greater than 6 mm. After the tests the
samples shall show no signs of disintegration, nor shall there be any crack visible to normal or
corrected vision without additional magnification. One min after the load has been removed,
there shall be no permanent deformation exceeding 3 mm.
The electrical safety shall not be impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the sample to check that the
declared degree of protection against access to hazardous parts is maintained. The declared
degree of protection against access to hazardous parts is either the additional letter directly
declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of protection
against access to hazardous parts indirectly declared by the manufacturer according 6.7.1 of
Part 1.
10.5.104 Load test for application – Force applied through large surface area
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a rigid smooth support such as a plywood board 16 mm thick,
with a 50 mm minimum spacing between the assembly and the edge of the support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
NOTE 3 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 with a tolerance of ±2 °C for (168 ± 4) h
continuously.
The surface of the sample which can be exposed to traffic is loaded with the force declared
according to 6.103.
– 14 – IEC 61084-2-2:2017 © IEC 2017
A vertical force is applied through a circular steel plate with a 130 mm ± 0,5 mm diameter and
a thickness of 20 mm ± 1 mm with an edge radius of approximately 2 mm (Figure 109).
The circular plate is placed approximately in the middle of the length of the sample and in the
most unfavourable position in the width of the sample. In the case of multi-compartment
CTS/CDS whose partition(s) provide support, the middle of the largest compartment is
selected.
To allow for settlement of the sample, a pre-load of 200 N ± 40 N is applied and then the
measurement apparatus is calibrated to zero.
The force is gradually increased up to the value declared according to 6.103 with a tolerance
(+ 4 %, 0) over 15 s ± 5 s and maintained for 60 s ± 1 s.
During the test the samples shall show no deflection greater than 6 mm. After the tests the
samples shall show no signs of disintegration, nor shall there be any crack visible to normal or
corrected vision without additional magnification. One min after the load has been removed,
there shall be no permanent deformation exceeding 3 mm.
The electrical safety shall not be impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the sample to check that the
declared degree of protection against access to hazardous parts is maintained. The declared
degree of protection against access to hazardous parts is either the additional letter directly
declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of protection
against access to hazardous parts indirectly declared by the manufacturer according 6.7.1 of
Part 1.
10.6 System access cover retention
Addition after the fourth paragraph:
NOTE Functional area refers, for example, to a fitting, an apparatus mounting device, a junction as shown in
Figure 106.
Addition after the sixth paragraph:
Examples for arrangement are shown in Figure 107.
11 Electrical properties
This clause of Part 1 is applicable.
12 Thermal properties
This clause of Part 1 is applicable.
13 Fire hazard
This clause of Part 1 is applicable.
14 External influences
This clause of Part 1 is applicable, except as follows:

14.1 Degree of protection provided by enclosure
Add after the third paragraph the following:
The assembly is placed in such a way that the upper surface of floor is in the horizontal plane.
The test floor is flat and extends 100 mm ± 10 mm beyond the edges of the samples.
Replace the fourth paragraph by:
The following ageing treatment is carried out on assemblies including non-metallic system
component or composite system component before the tests of 14.1.1, 14.1.2 and 14.1.3.
14.1.3 Protection against ingress of water
Add after the fourth paragraph the following:
For service unit and access unit the formula is:
-3
5 x 10 x internal volume of the service unit or access unit.
14.1.4 Protection against access to hazardous parts
Add the following paragraph:
Service units are tested with the cover opened.
Additional subclause:
14.101 Protection against corrosion by wet screed material
Parts of CTS/CDS intended to be in contact with wet screed material which are made entirely
or partially of metal shall have adequate protection against corrosion.
For small fixing devices, such as screws, nuts and the like a coating of grease is deemed to
be a sufficient protection against rusting.
Compliance is checked by the following test.
The sample is degreased by immersion in white spirit with a kauri-butanol value of 35 ± 5 or
an equivalent degreasing agent for 10 min ± 1 min.
After degreasing the sample is submitted to a test according to IEC 60068-2-60 using test
method 1 with test duration of 4 days.
After exposure, the surface shall show no areas of red rust. White rust (zinc oxide) and traces
of red rust which are removable by rubbing as well as traces of rust at the surface of cuts,
bent edges and welded joints are ignored.
15 Electromagnetic compatibility
This clause of Part 1 is applicable.
Addition:
– 16 – IEC 61084-2-2:2017 © IEC 2017

8 6 4
7 1 2
IEC
▼ Indicates a removable cover for a CTS

NOTE An explanation of the numbers used in this figure is given in Annex A.
Figure 101 – Types and application of CTS/CDS for underfloor,
flushfloor or onfloor installations

IEC
Figure 102a) – Underfloor CDS – Embedded in the floor
IEC
Figure 102b) – Flushfloor CTS/CDS – Installed flush with the upper level of the floor
IEC
Figure 102c) – Underfloor CTS/CDS – Installed under a raised floor
IEC
Figure 102d) – Onfloor CTS/CDS – Installed above the upper level of the floor

Figure 102 – Examples of trunking and ducting installations

– 18 – IEC 61084-2-2:2017 © IEC 2017
IEC
Key
1 ducting length
2 fitting
3 access unit
4 service unit mounted flus
...

IEC 61084-2-2 ®
Edition 2.1 2024-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable trunking systems and cable ducting systems for electrical installations –
Part 2-2: Particular requirements – Cable trunking systems and cable ducting
systems intended for mounting underfloor, flushfloor, or onfloor

Systèmes de goulottes et systèmes de conduits-profilés pour installations
électriques –
Partie 2-2 : Exigences particulières – Systèmes de goulottes et systèmes de
conduits-profilés prévus pour être montés en sous-sol, encastrés dans le sol, ou
sur le sol
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IEC 61084-2-2 ®
Edition 2.1 2024-03
CONSOLIDATED VERSION
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Cable trunking systems and cable ducting systems for electrical installations –
Part 2-2: Particular requirements – Cable trunking systems and cable ducting
systems intended for mounting underfloor, flushfloor, or onfloor
Systèmes de goulottes et systèmes de conduits-profilés pour installations
électriques –
Partie 2-2 : Exigences particulières – Systèmes de goulottes et systèmes de
conduits-profilés prévus pour être montés en sous-sol, encastrés dans le sol, ou
sur le sol
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.060.01, 29.120.10 ISBN 978-2-8322-8503-9

REDLINE VERSION – 2 – IEC 61084-2-2:2017+AMD1:2024 CSV
© IEC 2024
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 General requirements . 6
5 General conditions for tests . 7
6 Classification . 7
7 Marking and documentation . 7
8 Dimensions. 8
9 Construction . 8
10 Mechanical properties. 9
11 Electrical properties . 14
12 Thermal properties . 14
13 Fire hazard . 14
14 External influences . 15
15 Electromagnetic compatibility . 15
Annex A (informative) Types of cable trunking systems (CTS) and cable ducting
systems (CDS) . 27
Annex B (normative) CTS/CDS IK code . 28
Annex AA (normative) Mechanical load tests . 29
Bibliography . 31

Figure 101 – Types and application of CTS/CDS for underfloor, flushfloor or onfloor
installations . 16
Figure 102 – Examples of trunking and ducting installations . 17
Figure 103 – Example of underfloor embedded CDS according to 3.101 . 18
Figure 104 – Example of flushfloor CTS according to 3.102 . 19
Figure 105 – Example of onfloor CTS according to 3.103 . 20
Figure 106 – Principles for arrangement . 21
Figure 107 – Examples for arrangement . 22
Figure 108 – Load test set-up for CTS/CDS in accordance with 10.5.103 . 24
Figure 109 – Load test set-up for CTS/CDS in accordance with 10.5.104 . 26

Table A.2 – Types of CTS and CDS for floor installation . 27
Table AA.1 – Mechanical load tests . 29

© IEC 2024
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
CABLE TRUNKING SYSTEMS AND CABLE DUCTING
SYSTEMS FOR ELECTRICAL INSTALLATIONS –

Part 2-2: Particular requirements – Cable trunking systems and cable
ducting systems intended for mounting underfloor, flushfloor, or onfloor

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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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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9) IEC draws attention to the possibility that the implementation of this document may involve the use of (a)
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https://patents.iec.ch. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been
prepared for user convenience.
IEC 61084-2-2 edition 2.1 contains the second edition (2017-03) [documents
23A/828/FDIS and 23A/836/RVD] and its amendment 1 (2024-03) [documents
23A/1061/FDIS and 23A/1069/RVD].
In this Redline version, a vertical line in the margin shows where the technical content
is modified by amendment 1. Additions are in green text, deletions are in strikethrough
red text. A separate Final version with all changes accepted is available in this
publication.
REDLINE VERSION – 4 – IEC 61084-2-2:2017+AMD1:2024 CSV
© IEC 2024
International Standard IEC 61084-2-2 has been prepared by subcommittee 23A: Cable
management systems, of IEC technical committee 23: Electrical accessories.
This second edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
• classification;
• construction;
• mechanical and electrical properties.
This International standard is to be used in conjunction with IEC 61084-1:2017.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
This part of the IEC 61084 series supplements or modifies the corresponding clauses of
IEC 61084-1:2017 as follows:
– where no particular clause or subclause of IEC 61084-1 is mentioned, the corresponding
clause or subclause of IEC 61084-1 applies as far as it is reasonable;
– where “addition” or “replacement” is stated, the relevant text of IEC 61084-1 is to be
adapted accordingly;
– subclauses, figures and tables which are additional to those in IEC 61084-1 are numbered
starting from 101.
In this standard, the following print types are used:
– requirements and definitions: roman type;
– compliance statements: italic type.
A list of all parts in the IEC 61084 series, published under the general title Cable trunking and
cable ducting systems for electrical installations, can be found on the IEC website.
The committee has decided that the contents of this document and its amendment will remain
unchanged until the stability date indicated on the IEC website under webstore.iec.ch in the
data related to the specific document. At this date, the document will be
• reconfirmed,
• withdrawn, or
• revised.
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.
© IEC 2024
CABLE TRUNKING SYSTEMS AND CABLE DUCTING
SYSTEMS FOR ELECTRICAL INSTALLATIONS –

Part 2-2: Particular requirements – Cable trunking systems and cable
ducting systems intended for mounting underfloor, flushfloor, or onfloor

1 Scope
This part of the IEC 61084 series specifies requirements and tests for cable trunking systems
(CTS) and cable ducting systems (CDS) intended for the accommodation, and where
necessary for the electrically protective separation, of insulated conductors, cables and
possibly other electrical equipment in electrical and/or communication systems installations.
The maximum voltage of these installations is 1 000 V AC and 1 500 V DC.
These systems are intended for mounting underfloor, flushfloor or onfloor.
This document does not apply to CTS/CDS which are intended to be fixed to the wall and
supported by the floor.
This document does not apply to conduit systems, cable tray systems, cable ladder systems,
power track systems or equipment covered by other standards.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
IEC 60068-2-60:2015, Environmental testing – Part 2-60: Tests – Test Ke: Flowing mixed gas
corrosion test
IEC 60068-2-75:2014, Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests
IEC 61084-1:2017, Cable trunking systems and cable ducting systems for electrical
installations – Part 1: General requirements
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
3.1 Replace Note 1 to entry by:
Note 1 to entry: Different types of CTS are shown in Figure 101 and explained in Annex A.
3.2 Replace Note 1 to entry by:
Note 1 to entry: Different types of CDS are shown in Figure 101 and explained in Annex A.

REDLINE VERSION – 6 – IEC 61084-2-2:2017+AMD1:2024 CSV
© IEC 2024
3.3 Addition:
f) service unit
Replace Note 1 to entry by:
Note 1 to entry: A system does not necessarily include all system components a) to f). Different combinations of
system components can be used.
Addition:
3.101
underfloor CTS/CDS
CTS/CDS whose components, except access units and service units, are intended to be
mounted within or under a floor and in normal use are not exposed to traffic loads
Note 1 to entry: See Figures 102a), 102c) and 103.
3.102
flushfloor CTS/CDS
CTS/CDS whose components, except access units and service units, are intended to be
mounted flush such that the height above the upper level of the floor covering is not more
than 4 mm
Note 1 to entry: The upper surface is considered to be exposed to traffic loads.
Note 1 to entry: See Figures 102b) and 104.
3.103
onfloor CTS/CDS
CTS/CDS whose components are intended to be mounted on a floor such that the height
above the upper level of the floor covering is greater than 4 mm
Note 1 to entry: The upper surface is considered to be exposed to traffic loads.
Note 2 to entry: See Figures 102d) and 105.
3.104
access unit
system component intended to provide access to insulated conductors or cables
3.105
service unit
system component intended for incorporation of one or more apparatus either directly or by
means of one or more apparatus mounting devices
3.106
service unit
service unit which has no cables connected to electrical equipment
3.107
service unit
service unit which has cables connected to electrical equipment
4 General requirements
This clause of Part 1 is applicable.

© IEC 2024
5 General conditions for tests
This clause of Part 1 is applicable.
6 Classification
This clause of Part 1 is applicable, except as follows:
Additional subclauses:
6.101 According to floor treatment
6.101.1 CTS/CDS for dry-treatment of floor
6.101.2 CTS/CDS for wet-treatment of floor when the service unit is not in use
6.101.3 CTS/CDS for wet-treatment of floor when the service unit is in use
6.102 According to resistance to vertical load applied through small surface area
6.102.1 CTS/CDS for 500 N
6.102.2 CTS/CDS for 750 N
6.102.3 CTS/CDS for 1 000 N
6.102.4 CTS/CDS for 1 500 N
6.102.5 CTS/CDS for 2 000 N
6.102.6 CTS/CDS for 2 500 N
6.102.7 CTS/CDS for 3 000 N
6.103 Optional classification according to resistance to vertical load applied through
large surface area
6.103.1 CTS/CDS for 2 000 N
6.103.2 CTS/CDS for 3 000 N
6.103.3 CTS/CDS for 5 000 N
6.103.4 CTS/CDS for 10 000 N
6.103.5 CTS/CDS for 15 000 N
7 Marking and documentation
This clause of Part 1 is applicable, except as follows:
Additional subclauses:
7.101 Access units and service units of systems classified according to 6.101.1 shall be
marked that they are suitable for dry treatment of floor only. The marking shall be visible by
the user which may be achieved by opening the cover.
NOTE This marking can be in the form of text or graphic.

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7.102 Service units shall be marked with a warning about the potential damage to electrical
accessories by closing the cover. The marking shall be visible by the user which may be
achieved by opening the cover.
NOTE This marking can be in the form of text or graphic.
7.103 Compliance with 7.101 and 7.102 is checked by inspection.
8 Dimensions
This clause of Part 1 is applicable, except as follows:
Addition:
There are no dimensions requirements.
9 Construction
This clause of Part 1 is applicable, except as follows:
Addition:
9.101 Access covers of underfloor, flushfloor and onfloor CTS/CDS, which in normal use are
subjected to external mechanical loads, shall resist movement and unintentional opening.
Compliance is checked by inspection and by the tests of 10.5.
9.102 Service units installed flushfloor shall protect the installed electrical apparatus and the
plug from direct impact when in use. This protection shall be effective and shall not cause
damage to the outgoing cable.
Compliance is checked by inspection and by the tests of 10.3.
9.103 It shall be possible to securely fix:
– service units to the system;
– electrical apparatus to the service units.
Compliance is checked by the tests of 10.3 and 10.5.1.
9.104 When the service unit is not in use, it shall be possible to close openings intended for
the passage of cables, except when the openings have one dimension less than 20 mm in one
direction and the manufacturer's instructions require the openings of the service unit to be
installed within 30 mm from the wall.
Openings, when in use, in underfloor and flushfloor CTS/CDS, for the passage of cables,
need not be closed if one of its dimensions is less than 20 mm in one direction.
Compliance is checked by inspection and measurement.
9.105 Underfloor and flushfloor CTS/CDS which in normal use are embedded in screed
material shall be protected against ingress of the screed material.

© IEC 2024
Openings leading to the interior of underfloor and flushfloor CTS/CDS which in normal use,
are located below the upper level of the floor without covering, shall not be wider than 7 mm
in one direction.
Compliance is checked by inspection and measurement.
NOTE The dimensioning of the maximum width of the clear opening is based on the grain size of cementitious
screeds.
9.106 CTS/CDS declared according to 6.101.2 and 6.101.3 shall avoid water coming into
contact with insulated conductors and live parts during wet-treatment of floor by one or a
combination of the following methods which may vary within the system:
– method 1: ensuring by design that water does not come into contact with insulated
conductors and live parts when the water level is 10 mm above the upper level of the floor
covering;
– method 2: providing an IP rating not less than IPX4;
– method 3: providing manufacturer's instructions which require that insulated conductors
and live parts are positioned not less than 10 mm above the upper level of the floor
covering.
For method 1, compliance is checked by measurement. For method 2, compliance is checked
by the test of 14.1.2. For method 3, compliance is checked by inspection.
9.107 Access cover of service unit, if any, shall withstand repeated opening and closing as
in normal use.
Compliance is checked by 100 cycles of opening and closing of the access cover.
After the test there shall be no damage to impair the further use of the access cover.
9.108 Additional requirements for service units intended to be installed onfloor are given in
IEC 61084-2-4:2017.
10 Mechanical properties
This clause of Part 1 is applicable, except as follows:
10.1 Mechanical strength
Replacement:
Underfloor, flushfloor and onfloor CTS/CDS shall have adequate mechanical strength.
Compliance is checked by the tests specified in 10.3 and 10.5 according to Annex AA.
10.2 Cable support test
Not applicable.
10.3 Impact test
10.3.2 Impact test for installation and application
Additional subclauses:
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10.3.2.101 Systems components only intended to be mounted underfloor are not tested. The
test is carried out on an assembly made of one or more trunking lengths or ducting lengths
with the relevant system component, if any, to fulfil the various functions of the system and
prepared according to the manufacturer’s instructions. More than one assembly may be
necessary to fulfil the various functions of the system. In each direction, the length L of
trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
250 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a rigid smooth support such as a plywood board 16 mm thick,
with a 50 mm minimum spacing between the assembly and the edge of the support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
Other system components can be included to prevent movements. These system components
are the system components to terminate the trunking length or ducting length, if any. When
there is no such system component, a system component chosen by the manufacturer is
used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 of Part 1 with a tolerance of ±2 °C for
(168 ± 4) h continuously.
10.3.2.102 The impact test apparatus according to Clause 4 of IEC 60068-2-75:2014, is
mounted on a solid wall or structure providing sufficient support.
The samples are placed in a cabinet at the temperature declared according to Table 2 with a
±2 °C.
tolerance of
10.3.2.103 After 2 h, each sample is, in turn, removed from the cabinet and immediately
placed in position in the impact test apparatus.
At 12 s ± 2 s after the removal of the sample from the cabinet the hammer is allowed to fall so
that an impact is applied as far as possible perpendicular to the accessible region of the
sample likely to be the weakest. Compliance with impact applied before 10 s provides also
compliance with this test of the standard.
NOTE 1 The region likely to be the weakest can be on the relevant system component but can also be on a
trunking length or a ducting length.
No impact is applied to knockouts, membranes and the like.
No impact is applied within 50 mm of any open extremity of the sample.
NOTE 2 When another system component has been included at an extremity of the sample to prevent
movements, this extremity is still considered open.
Instead of placing the samples in a cabinet and applying the impact at 12 s ± 2 s after the
removal of the sample from the cabinet, it is allowed to apply the impact in a climatic chamber
at the temperature declared according to Table 2 with a tolerance of ±2 °C on samples placed
at this temperature for 2 h. Compliance in the climatic chamber is sufficient. In case of failure
in the climatic chamber, compliance using the cabinet provides compliance with the standard.
10.3.2.104 After the test:
© IEC 2024
– the assemblies shall show no cracks or similar damage visible to normal or corrected
vision without magnification, and
– the assemblies shall remain intact, and
– the service unit cover shall be in a position
such that safety is not impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the impacted samples to check
that the declared degree of protection against access to hazardous parts is maintained. The
declared degree of protection against access to hazardous parts is either the additional letter
directly declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of
protection against access to hazardous parts indirectly declared by the manufacturer
according 6.7.1 of Part 1.
The assembly is opened to check that any internal cracks do not impair electrical safety.
NOTE Any cracks in internal dividers which are not likely to impair electrical safety or use are ignored. Electrical
safety can be impaired when the impact creates a sharp edge on a partition which can damage insulated
conductors or cables (see 9.1 of Part 1)
10.4 Linear deflection test
Not applicable.
10.5 External load test
Additional subclauses:
10.5.101 Underfloor CTS/CDS, flushfloor CTS/CDS and onfloor CTS/CDS shall have
sufficient mechanical strength against external mechanical loads likely to occur during
transport, storage, installation and normal use.
Compliance is checked by the tests of 10.5.102, 10.5.103 and 10.5.104.
Any part for temporary use only during the installation phase does not need to comply with
these tests but may be included for the test of 10.5.102 to allow compliance of other parts.
A summary of tests is given in Annex AA.
10.5.102 Load test for installation
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a horizontal rigid smooth support such as a plywood board
16 mm thick, with a 50 mm minimum spacing between the assembly and the edge of the
support.
NOTE 2 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.

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Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite components are aged at the
temperature declared according to Table 3 with a tolerance of ±2 °C for (168 ± 4) h
continuously.
A vertical force is applied centrally for 120 s ± 5 s to a steel cube of 50 mm ±0,5 mm with an
edge radius of approximately 1 mm.
The cube is placed approximately in the middle of the length of the sample and in the most
unfavourable position in the width of the sample. In the case of multi-compartment CTS/CDS
whose partition(s) provide support, the middle of the largest compartment is selected.
To allow for settlement of the sample, a pre-load of 25 N ± 5 N is applied and then the
measurement apparatus is calibrated to zero.
For the test of CTS/CDS intended to be installed underfloor under a raised floor a force of
250 N (+ 10 N, 0) is applied.
For the test of CDS intended to be embedded underfloor and CTS/CDS intended to be
installed flushfloor a force of 750 N (+ 30 N, 0) is applied except on parts of which the cover
remains visible and above the floor level during the whole installation phase for which a force
of 250 N (+ 10 N, 0) is applied.
During the test the vertical displacement of the cube shall be less than 25 mm.
Cracks are allowed but the maximum vertical displacement of the cube shall not be exceeded.
10.5.103 Load test for application – Force applied through small surface area
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a horizontal rigid smooth support such as a plywood board
16 mm thick, with a 50 mm minimum spacing between the assembly and the edge of the
support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
NOTE 3 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 with a tolerance of ± 2°C for (168 ± 4) h
continuously.
© IEC 2024
The surface of the sample which can be exposed to traffic is loaded with the force declared
according to 6.102.
A vertical force is applied through a steel cylinder of 13,3 mm ± 0,1 mm diameter with an edge
radius of 1 mm providing a contact surface of approximately 1 cm with a minimum length of
30 mm (Figure 108).
The cylinder is placed approximately in the middle of the length of the sample and in the most
unfavourable position in the width of the sample. In the case of multi-compartment CTS/CDS
whose partition(s) provide support, the middle of the largest compartment is selected.
To allow for settlement of the sample, a pre-load of 50 N ± 10 N is applied and then the
measurement apparatus is calibrated to zero.
The force is gradually increased up to the value declared according to 6.102 with a tolerance
(+ 4 %, 0) over 15 s ± 5 s and maintained for 60 s ± 1 s.
During the test the samples shall show no deflection greater than 6 mm. After the tests the
samples shall show no signs of disintegration, nor shall there be any crack visible to normal or
corrected vision without additional magnification. One min after the load has been removed,
there shall be no permanent deformation exceeding 3 mm.
The electrical safety shall not be impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the sample to check that the
declared degree of protection against access to hazardous parts is maintained. The declared
degree of protection against access to hazardous parts is either the additional letter directly
declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of protection
against access to hazardous parts indirectly declared by the manufacturer according 6.7.1 of
Part 1.
10.5.104 Load test for application – Force applied through large surface area
The test is carried out on an assembly made of one or more trunking lengths or ducting
lengths with the relevant system component, if any, to fulfil the various functions of the
system and prepared according to the manufacturer’s instructions. More than one assembly
may be necessary to fulfil the various functions of the system. In each direction, the length L
of trunking length or ducting length coming out of the functional area associated with the
function of the system is as long as the width W of the trunking length or ducting length, or
500 mm, whichever is the greater. The tolerance of L is ± 25 mm.
NOTE 1 Functional area refers, for example, to a fitting, an apparatus mounting device or a junction as shown in
Figure 106.
The samples are mounted on a rigid smooth support such as a plywood board 16 mm thick,
with a 50 mm minimum spacing between the assembly and the edge of the support.
NOTE 2 For flushfloor CTS/CDS additional provision can be included to simulate the influence of the floor
material on the side of the product.
NOTE 3 Other system components can be included to prevent movements. These system components are the
system components to terminate the trunking length or ducting length, if any. When there is no such system
component, a system component chosen by the manufacturer is used.
Examples for arrangement are shown in Figure 107.
Before the test non-metallic system components and composite system components are aged
at the temperature declared according to Table 3 with a tolerance of ±2 °C for (168 ± 4) h
continuously.
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The surface of the sample which can be exposed to traffic is loaded with the force declared
according to 6.103.
A vertical force is applied through a circular steel plate with a 130 mm ± 0,5 mm diameter and
a thickness of 20 mm ± 1 mm with an edge radius of approximately 2 mm (Figure 109).
The circular plate is placed approximately in the middle of the length of the sample and in the
most unfavourable position in the width of the sample. In the case of multi-compartment
CTS/CDS whose partition(s) provide support, the middle of the largest compartment is
selected.
To allow for settlement of the sample, a pre-load of 200 N ± 40 N is applied and then the
measurement apparatus is calibrated to zero.
The force is gradually increased up to the value declared according to 6.103 with a tolerance
(+ 4 %, 0) over 15 s ± 5 s and maintained for 60 s ± 1 s.
During the test the samples shall show no deflection greater than 6 mm. After the tests the
samples shall show no signs of disintegration, nor shall there be any crack visible to normal or
corrected vision without additional magnification. One min after the load has been removed,
there shall be no permanent deformation exceeding 3 mm.
The electrical safety shall not be impaired.
In case of doubt, the test of 14.1.3 of Part 1 is carried out on the sample to check that the
declared degree of protection against access to hazardous parts is maintained. The declared
degree of protection against access to hazardous parts is either the additional letter directly
declared by the manufacturer according 6.7.3 of Part 1, if any, or the degree of protection
against access to hazardous parts indirectly declared by the manufacturer according 6.7.1 of
Part 1.
10.6 System access cover retention
Addition after the fourth paragraph:
NOTE Functional area refers, for example, to a fitting, an apparatus mounting device, a junction as shown in
Figure 106.
Addition after the sixth paragraph:
Examples for arrangement are shown in Figure 107.
11 Electrical properties
This clause of Part 1 is applicable.
12 Thermal properties
This clause of Part 1 is applicable.
13 Fire hazard
This clause of Part 1 is applicable.

© IEC 2024
14 External influences
This clause of Part 1 is applicable, except as follows:
14.1 Degree of protection provided by enclosure
Add after the third paragraph the following:
The assembly is placed in such a way that the upper surface of floor is in the horizontal plane.
The test floor is flat and extends 100 mm ± 10 mm beyond the edges of the samples.
Replace the fourth paragraph by:
The following ageing treatment is carried out on assemblies including non-metallic system
component or composite system component before the tests of 14.1.1, 14.1.2 and 14.1.3.
14.1.3 Protection against ingress of water
Add after the fourth paragraph the following:
For service unit and access unit the formula is:
-3
5 x 10 x internal volume of the service unit or access unit.
14.1.4 Protection against access to hazardous parts
Add the following paragraph:
Service units are tested with the cover opened.
Additional subclause:
14.101 Protection against corrosion by wet screed material
Parts of CTS/CDS intended to be in contact with wet screed material which are made entirely
or partially of metal shall have adequate protection against corrosion.
For small fixing devices, such as screws, nuts and the like a coating of grease is deemed to
be a sufficient protection against rusting.
Compliance is checked by the following test.
The sample is degreased by immersion in white spirit with a kauri-butanol value of 35 ± 5 or
an equivalent degreasing agent for 10 min ± 1 min.
After degreasing the sample is submitted to a test according to IEC 60068-2-60 using test
method 1 with test duration of 4 days.
After exposure, the surface shall show no areas of red rust. White rust (zinc oxide) and traces
of red rust which are removable by rubbing as well as traces of rust at the surface of cuts,
bent edges and welded joints are ignored.
15 Electromagnetic compatibility
This clause of Part 1 is applicable.

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Addition:
8 6 4
7 1 2
IEC
▼ Indicates a removable cover for a CTS

NOTE An explanation of the numbers used in this figure is given in Annex A.
Figure 101 – Types and applicati
...