SIST EN 50085-2-1:2007
(Main)Cable trunking systems and cable ducting systems for electrical installations -- Part 2-1: Cable trunking systems and cable ducting systems intended for mounting on walls and ceilings
- Abstract
Replacement: This European Standard 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 a.c. and 1 500 V d.c. These systems are intended for mounting on walls and/or ceilings. They may be embedded, installed in a flush or semi-flush state, surface mounted or mounted away from the surface using fixing devices. This standard does not apply to conduit systems, cable tray systems, cable ladder systems, power track systems or equipment covered by other standards. This standard shall be used in conjunction with EN 50085-1:2005: Cable trunking systems and cable ducting systems for electrical installations - Part 1 General requirements which is referred to in this document as Part 1.
- Status
- Published
- Publication Date
- 17-Oct-2007
- Technical Committee
- I11 - Imaginarni 11
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 09-Oct-2007
- Due Date
- 14-Dec-2007
- Completion Date
- 18-Oct-2007
- Directive
- 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)OJ Ref: C 348/03 OJ Date: 28-Nov-2013
2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limitsOJ Ref: C 249/03 OJ Date: 08-Jul-2016
SIST EN 50085-2-1:2007 is the Slovenian adoption of the European Standard EN 50085-2-1:2006 from CENELEC. It specifies requirements and tests for cable trunking systems (CTS) and cable ducting systems (CDS) used to contain insulated conductors, cables and, where needed, other electrical equipment in electrical and communication installations up to 1 000 V a.c. and 1 500 V d.c. It is intended to be read with EN 50085-1:2005, which provides the general requirements for the series.
What does SIST EN 50085-2-1:2007 specify?
SIST EN 50085-2-1:2007 specifies the particular requirements for CTS and CDS intended for mounting on walls and ceilings. The document supplements and modifies Part 1, so a user needs both documents to apply the standard correctly in design, testing and product declaration.
The scope covers systems that may be embedded, flush or semi-flush mounted, surface mounted, or mounted away from the surface using fixing devices. The standard focuses on cable management products for electrical and communication installations, and it also addresses electrically protective separation where that is needed in practice.
It excludes conduit systems, cable tray systems, cable ladder systems, power track systems and equipment covered by other standards.
| Annex | What it covers |
|---|---|
| Annex A | Types of CTS and CDS |
| Annex B | Annex of Part 1 applicable |
| Annex C | Annex of Part 1 applicable, normative |
What are the key requirements of SIST EN 50085-2-1:2007?
The main technical content is in Clauses 6 to 10, with later clauses identified for electrical, thermal, fire, external influences and EMC topics. For a manufacturer or specifier, the practical point is that the standard is not only about shape and mounting, but also about declared use, documentation, mechanical strength and protection in real installation conditions.
Classification and declared use
Clause 6 classifies CTS/CDS by installation position, liquid protection situation, type and, for CDS, resistance to compression. The installation position classes cover embedded, flush, semi-flush or surface mounted, and mounted away from the wall or ceiling using fixing devices. In practice, this means the product has to be declared for the way it will actually be installed.
Clause 6 also distinguishes Type 1, Type 2 and Type 3 CTS/CDS. Type 2 provides distribution functions such as in-line junctions, direction changes and termination, while Type 3 adds apparatus mounting. This matters because buyers need to know whether the product is only for routing cables or also for mounting devices.
For some skirting-position applications, Clause 6 sets out different ways the manufacturer can declare how contact between liquids and live parts is prevented. CDS are also classified by compression resistance at several declared levels. That helps the installer choose a duct that can still accept cable pulling after site loading.
Marking and documentation
Clause 7 requires the manufacturer to provide the information needed for safe installation and use. The documentation has to identify the system components and their functions, the classification, the list of functions for Type 1 CTS/CDS, the linear impedance, the rated voltage, the usable cross-sectional area for cables, and the instructions needed to reach the declared classification and functions.
The documentation also has to include the recommended installation position needed to maintain the declared IP classification after installation. In practice, this is the part that tells installers how to mount the system so the declared performance remains valid on site.
Construction and protection against liquids
Clause 9 requires system components to fit correctly. It also sets the requirement for preventing liquids from reaching insulated conductors and live parts in the declared cases.
Where the cable area is at least 10 mm above the floor because of the design or the manufacturer’s instructions, compliance is checked by inspection and measurement. In other cases, Clause 9 uses a wet-treatment test with absorbent paper and controlled water exposure. The purpose is to show that, during floor wetting, liquid does not reach the conductors along the tested function.
Mechanical performance
Clause 10 covers the cable support test, impact resistance, linear deflection and compression resistance for CDS. The cable support tests use loaded samples to check how much a trunking or duct length sags under cable weight, with limits depending on mounting position. For the user, this tells you whether covers, separators and cable retainers stay in place and whether the system keeps its shape when filled.
The impact test checks assemblies in their intended arrangement, including fittings and apparatus mounting devices where relevant. After impact, the assembly must show no visible cracking or similar damage and must remain intact so safety is not impaired. If there is doubt, the standard checks whether the declared protection against access to hazardous parts is still maintained.
The linear deflection test applies only to CTS/CDS mounted away from the wall or ceiling using fixing devices. The permitted deflection is very small relative to the support spacing, so this is the test that confirms the product can span between supports without excessive bending.
For CDS, the compression test verifies that the duct remains usable for cable drawing-in after compression. The key practical result is that the internal space must not collapse beyond the permitted change in the inscribed circle.
Dimensions and later clauses
Clause 8 states that there are no dimension requirements in this part. Clauses 11 to 15 are present for electrical properties, thermal properties, fire effects, external influences and electromagnetic compatibility.
What terms does SIST EN 50085-2-1:2007 define?
- Cable trunking systems (CTS) - systems for containing insulated conductors, cables and possibly other electrical equipment in electrical and communication installations.
- Cable ducting systems (CDS) - systems with the same general use as CTS, with requirements that also cover compression resistance for the ducting form.
- Type 2 CTS/CDS (Distribution CTS/CDS) - CTS/CDS that provide distribution functions such as junctions, direction changes and termination.
- Type 3 CTS/CDS (Installation CTS/CDS) - Type 2 CTS/CDS that also provide an apparatus mounting function.
- Surface mounting CTS/CDS - CTS/CDS intended to be mounted on a surface.
- Flush-mounting CTS/CDS - CTS/CDS intended to sit flush with the finished surface, with at least 90 % of the product depth recessed.
- Semi-flush mounting CTS/CDS - CTS/CDS intended to fit within a mounting surface so that more than 10 % of the depth projects from the finished surface.
Who uses SIST EN 50085-2-1:2007?
Manufacturers of cable management products use SIST EN 50085-2-1:2007 to design and declare wall- and ceiling-mounted CTS/CDS. Test laboratories use it for the cable support, impact, deflection and compression tests. Installers, specifiers, quality managers and buyers use it to choose the correct product type, mounting form and declared performance for electrical and communication installations.
The standard is also relevant in building and industrial electrical installation work, where trunking or ducting must route cables neatly while maintaining access, separation and mechanical integrity.
What changed in SIST EN 50085-2-1:2007 from the previous edition?
SIST EN 50085-2-1:2007 is identified as identical to EN 50085-2-1:2006.
Which standards are used with SIST EN 50085-2-1:2007?
- EN 50085-1:2005 - the general requirements part that this document is used with; it supplies the base clauses that Part 2-1 supplements or modifies.
- EN 60068-2-75:1997 - provides the hammer test method used in the environmental testing reference.
- EN 20535:1994 - gives the Cobb method for determining water absorptiveness of the absorbent paper used in the wet-treatment test.
- EN ISO 536:1996 - gives the method for determining grammage of the absorbent paper used in the wet-treatment test.
What does the SIST EN 50085-2-1:2007 document contain?
The document contains clause-by-clause requirements, test conditions and the arrangements used to verify performance. The figures show the types and applications of CTS/CDS for wall or ceiling installation, plus the set-ups for cable support, impact, linear deflection and CDS compression tests.
It also includes the classification structure, the documentation content required from the manufacturer, and the test methods that use loaded samples, absorbent paper and defined support arrangements. For anyone validating a product, these are the parts that translate the standard into a practical test plan and product declaration.
Relations
- Effective Date
- 01-Nov-2024
- Effective Date
- 03-Feb-2026
- Effective Date
- 28-Jan-2023
- Effective Date
- 03-Sep-2010
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Frequently Asked Questions
SIST EN 50085-2-1:2007 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Cable trunking systems and cable ducting systems for electrical installations -- Part 2-1: Cable trunking systems and cable ducting systems intended for mounting on walls and ceilings". This standard covers: Replacement: This European Standard 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 a.c. and 1 500 V d.c. These systems are intended for mounting on walls and/or ceilings. They may be embedded, installed in a flush or semi-flush state, surface mounted or mounted away from the surface using fixing devices. This standard does not apply to conduit systems, cable tray systems, cable ladder systems, power track systems or equipment covered by other standards. This standard shall be used in conjunction with EN 50085-1:2005: Cable trunking systems and cable ducting systems for electrical installations - Part 1 General requirements which is referred to in this document as Part 1.
Replacement: This European Standard 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 a.c. and 1 500 V d.c. These systems are intended for mounting on walls and/or ceilings. They may be embedded, installed in a flush or semi-flush state, surface mounted or mounted away from the surface using fixing devices. This standard does not apply to conduit systems, cable tray systems, cable ladder systems, power track systems or equipment covered by other standards. This standard shall be used in conjunction with EN 50085-1:2005: Cable trunking systems and cable ducting systems for electrical installations - Part 1 General requirements which is referred to in this document as Part 1.
SIST EN 50085-2-1:2007 is classified under the following ICS (International Classification for Standards) categories: 29.120.10 - Conduits for electrical purposes. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 50085-2-1:2007 has the following relationships with other standards: It is inter standard links to SIST EN IEC 61084-2-1:2024, SIST EN 60068-2-75:2014, SIST EN 50085-2-1:2007/A1:2012, SIST EN 50085-2-1:2007/A1:2012. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 50085-2-1:2007 is associated with the following European legislation: EU Directives/Regulations: 2006/95/EC, 2010-01-3290, 2014/35/EU, 73/23/EEC. When a standard is cited in the Official Journal of the European Union, products manufactured in conformity with it benefit from a presumption of conformity with the essential requirements of the corresponding EU directive or regulation.
SIST EN 50085-2-1:2007 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2007
6LVWHPLNDEHOVNLKNRULWLQVLVWHPLNDEHOVNLKFHYL]DHOHNWULþQHLQVWDODFLMH±GHO
6LVWHPLNDEHOVNLKNRULWLQVLVWHPLNDEHOVNLKFHYL]DPRQWDåRQDVWHQHLQVWURSH
Cable trunking systems and cable ducting systems for electrical installations -- Part 2-1:
Cable trunking systems and cable ducting systems intended for mounting on walls and
ceilings
Elektroinstallationskanalsysteme für elektrische Installationen -- Teil 2-1: Besondere
Anforderungen für Elektroinstallationskanalsysteme für Wand und Decke
Systemes de goulottes et systemes de conduits-profilés pour installations électriques --
Partie 2-1: Systemes de goulottes et systemes de conduits-profilés prévus pour etre
montés sur les murs et les plafonds
Ta slovenski standard je istoveten z: EN 50085-2-1:2006
ICS:
29.120.10 ,QãWDODFLMVNHFHYL]D Conduits for electrical
HOHNWULþQHQDPHQH purposes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN 50085-2-1
NORME EUROPÉENNE
October 2006
EUROPÄISCHE NORM
ICS 29.120.10
English version
Cable trunking systems and cable ducting systems
for electrical installations
Part 2-1: Cable trunking systems and cable ducting systems
intended for mounting on walls and ceilings
Systèmes de goulottes et systèmes Elektroinstallationskanalsysteme
de conduits-profilés pour installations für elektrische Installationen
électriques Teil 2-1: Besondere Anforderungen
Partie 2-1: Systèmes de goulottes et für Elektroinstallationskanalsysteme
systèmes de conduits-profilés prévus pour für Wand und Decke
être montés sur les murs et les plafonds
This European Standard was approved by CENELEC on 2006-10-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels
© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50085-2-1:2006 E
Foreword
This European Standard was prepared by the Technical Committee CENELEC TC 213, Cable
management.
The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50085-2-1
on 2006-10-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-10-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-10-01
This standard is a system standard for cable management products used for electro-technical
purposes. It relates to the Council Directives on the approximation of laws, regulations and
administrative provisions of the Member States relating to Low Voltage Directive (73/23/EEC)
through consideration of the essential requirements of this directive.
This standard is supported by separate standards to which references are made.
This Part 2 is to be used in conjunction with EN 50085-1:2005, Cable trunking and cable ducting
systems for electrical installations – Part 1: General requirements.
This Part 2 supplements or modifies the corresponding clauses of Part 1. Where a particular
clause or subclause of Part 1 is not mentioned in this Part 2, that clause or subclause of Part 1
applies as far as is reasonable. Where this Part 2 states “addition” or “replacement”, the relevant
text of Part 1 is to be adapted accordingly.
Subclauses and figures which are additional to those in Part 1 are numbered starting from 101.
– 3 – EN 50085-2-1:2006
Contents
Page
1 Scope.4
2 Normative references.4
3 Definitions .4
4 General requirements .5
5 General conditions for tests .5
6 Classification .5
7 Marking and documentation .7
8 Dimensions.7
9 Construction .7
10 Mechanical properties.9
11 Electrical properties .14
12 Thermal properties .14
13 Fire effects .14
14 External influences .14
15 Electromagnetic compatibility.14
Annex A (informative) Types of cable trunking systems (CTS) and cable ducting systems
(CDS) .24
Annex B (informative).24
Annex C (normative) .24
Figure 101 - Types and application of CTS/CDS for wall or ceiling installation.15
Figure 102 - Arrangement for cable support test according to 10.2.2.16
Figure 103 - Arrangement for cable support test according to 10.2.3.16
Figure 104 - Arrangement for cable support test according to 10.2.4.17
Figure 105 - Arrangement for cable support test according to 10.2.5.17
Figure 106 - Impact test for installation and application – Principles for arrangement .18
Figure 107 - Impact test for installation and application – Examples for arrangement .21
Figure 108 - Arrangement for linear deflection test .22
Figure 109 - Example of arrangement for CDS compression test .23
1 Scope
Replacement:
This European Standard 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 a.c. and 1 500 V d.c.
These systems are intended for mounting on walls and/or ceilings. They may be embedded,
installed in a flush or semi-flush state, surface mounted or mounted away from the surface using
fixing devices.
This standard does not apply to conduit systems, cable tray systems, cable ladder systems, power
track systems or equipment covered by other standards.
This standard shall be used in conjunction with EN 50085-1:2005: Cable trunking systems and
cable ducting systems for electrical installations - Part 1 General requirements which is referred to
in this document as Part 1.
2 Normative references
This clause of Part 1 is applicable except as follows:
Addition:
EN 60068-2-75 1997 Environmental testing - Part 2-75: Tests - Test Eh: Hammer tests
(IEC 60068-2-75:1997)
EN 20535 1994 Paper and board - Determination of water absorptiveness - Cobb
method (ISO 535:1991)
EN ISO 536 1996 Paper and board – Determination of grammage (ISO 536:1995)
3 Definitions
This clause of Part 1 is applicable except as follows:
3.1 Replace the note by:
NOTE Different types of CTS are shown in Figure 101 and explained in Annex A.1.
3.2 Replace the note by:
NOTE Different types of CDS are shown in Figure 101 and explained in Annex A.1.
Addition:
3.101
type 2 CTS/CDS (Distribution CTS/CDS)
CTS/CDS which provides at least the following functions:
• in line junction between two trunking lengths or ducting lengths,
• internal and external changes of direction between two trunking lengths or ducting lengths,
– 5 – EN 50085-2-1:2006
• flat change of direction between two trunking lengths or ducting lengths with the exception of
certain systems where such a function is not required e.g. skirting CTS/CDS,
• "T" function between three trunking lengths or ducting lengths with the exception of certain
systems where such a function is not required e.g. Bench CTS,
• termination of a trunking length or a ducting length
3.102
type 3 CTS/CDS (Installation CTS/CDS)
distribution CTS/CDS which provides in addition apparatus mounting function
3.103
type 1 CTS/CDS
CTS/CDS that cannot be defined as a type 2 CTS/CDS (Distribution CTS/CDS) or as a type 3 CTS/CDS
(Installation CTS/CDS)
3.104
surface mounting CTS/CDS
CTS/CDS which is intended for mounting on a surface
3.105
flush-mounting CTS/CDS
CTS/CDS which is intended for mounting flush with the surface so that at least 90 % of the product depth
is recessed below the finished surface when installed according to manufacturer’s instructions
3.106
semi-flush mounting CTS/CDS
CTS/CDS which is intended to fit within a mounting surface so that more than 10 % of the product depth
projects from the finished surface
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:
Addition:
6.101 According to the intended installation positions
NOTE More than one classification can be declared.
6.101.1 CDS embedded in the wall or ceiling.
6.101.2 CTS/CDS flush in the wall or ceiling.
6.101.2.1 CTS/CDS flush in the wall.
6.101.2.2 CTS/CDS flush in the ceiling.
6.101.3 CTS/CDS semi flush or surface mounted on the wall or ceiling.
6.101.3.1 CTS/CDS semi flush or surface mounted on the wall.
6.101.3.2 CTS/CDS semi flush or surface mounted on the ceiling.
6.101.3.3 CTS/CDS wall fixed and supported by the floor.
6.101.3.4 CTS/CDS wall fixed and supported by a horizontal surface other than the floor.
6.101.4 CTS/CDS mounted away from the wall or ceiling using fixing devices.
6.102 According to the prevention of contact between liquids and insulated conductors
and live parts in case of CTS/CDS mounted in a skirting position and wet-treatment of floor
6.102.1 Not declared.
6.102.2 Relying completely on manufacturer’s instructions restricting the installation position of
the CTS/CDS.
6.102.3 Relying on manufacturer’s instructions allowing all installation positions of the CTS/CDS
but restricting the position of insulated conductors and live parts in CTS/CDS.
6.102.4 Relying on manufacturer’s instructions allowing all installation positions of the CTS/CDS
and all positions of insulated conductors and live parts in CTS/CDS.
NOTE Installation position refers to the distance between CTS/CDS and the floor.
6.103 According to the Type
6.103.1 Type 1 CTS/CDS.
6.103.2 Type 2 CTS/CDS (Distribution CTS/CDS).
6.103.3 Type 3 CTS/CDS (Installation CTS/CDS).
6.104 According to resistance to compression for CDS
6.104.1 CDS for compression 125 N.
6.104.2 CDS for compression 320 N.
6.104.3 CDS for compression 750 N.
6.104.4 CDS for compression 1 250 N.
6.104.5 CDS for compression 4 000 N.
– 7 – EN 50085-2-1:2006
7 Marking and documentation
This clause of Part 1 is applicable except as follows:
7.3 Replacement:
7.3 The manufacturer shall provide in his documentation all information necessary for the proper
and safe installation and use. It shall include
- components of the system,
- function of the system components and their assemblies,
- classification of the system in accordance with Clause 6,
- for type 1 CTS/CDS the list of functions,
- linear impedance, in Ω/m, of trunking length or ducting length of system declared according to
6.5.1,
- rated voltage of CTS/CDS declared according to 6.6.2,
- usable cross sectional area, in mm , for cables of the CTS/CDS,
NOTE Certain system components when mounted can reduce the usable cross sectional area for cables.
- instructions to reach the declared classification and functions of the system.
These instructions shall include the recommended installation positioning for the CTS/CDS to
ensure that the declared IP classification is maintained after installation.
Compliance 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 Assembling
System components shall fit correctly.
Compliance is checked by inspection.
9.102 Contact between liquids and insulated conductors and live parts
CTS/CDS declared according to 6.102.2, 6.102.3 or 6.102.4 shall prevent liquids coming into
contact with insulated conductors and live parts during wet-treatment of floor.
Compliance is checked by inspection and measurement when the area intended to accommodate
insulated conductors is at least 10 mm above the floor due to
• design, or
• manufacturer’s instructions restricting the installation position of the CTS/CDS, or
• manufacturer’s instructions allowing all installation positions of the CTS/CDS but restricting
the position of insulated conductors and live parts in CTS/CDS.
In all other cases compliance is checked by the following test carried out on an assembly or
assemblies.
An assembly is 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, a junction as shown in Figure 106
The assembly is fixed according to manufacturer’s instructions to an appropriate support. The
ends of the assembly are closed according to manufacturer’s instructions.
A (5 ± 1) mm wide strip of absorbent paper is placed on the lowest internal surface of CTS/CDS
intended for the accommodation of insulated conductors. If this lowest internal surface is
horizontal, the strip is placed approximately on the centre line of the surface. The absorbent paper
has a water absorptive height longitudinal of 75 mm per 10 min according to EN 20535 and a
basis weight of 250 g per m² according to EN ISO 536. The length of the strip is such that it
covers the whole length of the assembly.
NOTE 2 When the tested function of the system includes a change of direction, the length of paper can be made of more than
one strip.
Provisions are made such that the absorbent paper makes contact with the lowest internal surface
of CTS/CDS intended for the accommodation of insulated conductors along the whole length of
the assembly. These provisions shall not influence absorption by the paper.
The assembly is carefully placed in a tray containing water to simulate a (10 , 0/-1) mm height of
water on the floor.
NOTE 3 For easy measurement of wet area coloured water can be used.
After (15 ± 1) s the assembly is removed from the tray and the exterior of the assembly is
immediately wiped.
After careful removal of the access covers, if any, the abso
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