Cable trunking systems and cable ducting systems for electrical installations - Part 2-4: Particular requirements for service poles and service posts

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. Service poles and service posts are intended to be mounted in free space and in contact with mounting surface(s) only at one or two ends, where the word “mounted” means fixed or placed on the floor with a weighted base or linked to a mounting surface through a flexible component. NOTE Service poles and service posts can also be part of a CTS/CDS intended for wall or ceiling mounting covered by Part 2 1 or floor mounting covered by Part 2-2 and are then also tested according to Part 2-1 and/or Part 2-2 as appropriate. This European Standard does not apply to conduit systems, cable tray systems, cable ladder systems, powertrack systems or equipment covered by other standards. This European 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.

Elektroinstallationskanalsysteme für elektrische Installationen - Teil 2-4: Besondere Anforderungen für freistehende Installationseinheiten

Diese Europäische Norm legt Anforderungen und Prüfungen für Elektroinstallationskanalsysteme, die für die Aufnahme und, wo erforderlich, für die Auseinanderhaltung oder Separierung von isolierten Leitern, Kabeln, Leitungen und möglichen anderen elektrischen Betriebsmitteln in elektrischen Installationen oder Kommunikationssystemen fest. Die maximale Spannung dieser Installationen ist 1 000 V Wechselspannung und 1 500 V Gleichspannung. Freistehende Installationseinheiten sind für die freistehende Montage und die Montage in Kontakt mit Montageflächen an einem oder an zwei Enden vorgesehen. Der Begriff Montage bedeutet befestigt oder mit einer beschwerten Basis auf dem Boden stehend oder mit einem flexiblen Bauteil an einer Montagefläche befestigt. ANMERKUNG Freistehende Installationseinheiten können Teil eines Elektroinstallationskanalsystems für Wand und Decke nach Teil 2-1 oder eines Elektroinstallationskanalsystems für Installationen unterflur, aufflur oder boden¬bündig nach Teil 2-2 sein. Diese Europäische Norm gilt nicht für Elektroinstallationsrohrsysteme, Kabelträgersysteme, Stromschienensysteme oder Einrichtungen, die von anderen Normen abgedeckt sind. Diese Europäische Norm muss zusammen mit EN 50085-1:2005 „Elektroinstallationskanalsysteme für elektrische Installationen – Teil 1: Allgemeine Anforderungen“ benutzt werden, auf welche in dieser Norm als Teil 1 Bezug genommen wird.

Systèmes de goulottes et systèmes de conduits-profilés pour installations électriques - Partie 2-4: Règles particulières pour les colonnes et colonnettes

La présente Norme Européenne spécifie les règles 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. Les colonnes et les colonnettes sont prévues pour être montées en espace libre et au contact de la ou des surfaces de montage uniquement à une extrémité ou aux deux extrémités, le mot "montées" signifiant fixées ou placées sur le sol avec une base lestée ou reliées à une surface de montage au moyen d'un composant flexible. NOTE Les colonnes / colonnettes peuvent aussi faire partie d'un SG/SCP prévu pour être monté au mur ou au plafond et relevant de la Partie 2-1, ou prévu pour être monté au sol et relevant de la Partie 2-2, et sont alors aussi soumises à essai selon la Partie 2-1 et/ou la Partie 2-2 selon le cas. La présente Norme Européenne ne s'applique pas aux systèmes de conduit, systèmes de chemin de câble, systèmes d'échelle à câble, systèmes de canalisation préfabriquée ou aux équipements couverts par d’autres normes. La présente Norme Européenne doit être utilisée conjointement avec la EN 50085-1:2005 "Systèmes de goulottes et de conduits-profilés pour installations électriques – Partie 1: Règles générales", à laquelle il est fait référence dans ce document comme Partie 1.

Sistemi kabelskih korit in sistemi kabelskih cevi za električne inštalacije - 2-4. del: Posebne zahteve za podporne drogove

General Information

Status
Published
Publication Date
24-Jun-2009
Current Stage
6060 - Document made available
Due Date
25-Jun-2009
Completion Date
25-Jun-2009

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SLOVENSKI STANDARD
SIST EN 50085-2-4:2009
01-september-2009

6LVWHPLNDEHOVNLKNRULWLQVLVWHPLNDEHOVNLKFHYL]DHOHNWULþQHLQãWDODFLMHGHO

3RVHEQH]DKWHYH]DSRGSRUQHGURJRYH

Cable trunking systems and cable ducting systems for electrical installations - Part 2-4:

Particular requirements for service poles

Elektroinstallationskanalsysteme für elektrische Installationen - Teil 2-4: Besondere

Anforderungen für freistehende Installationseinheiten

Systèmes de goulottes et systèmes de conduits-profilés pour installations électriques -

Partie 2-4: Règles particulières pour les colonnes de service
Ta slovenski standard je istoveten z: EN 50085-2-4:2009
ICS:
29.120.10 ,QãWDODFLMVNHFHYL]D Conduits for electrical
HOHNWULþQHQDPHQH purposes
SIST EN 50085-2-4:2009 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 50085-2-4:2009
---------------------- Page: 2 ----------------------
SIST EN 50085-2-4:2009
EUROPEAN STANDARD
EN 50085-2-4
NORME EUROPÉENNE
June 2009
EUROPÄISCHE NORM
ICS 29.120.10
English version
Cable trunking systems and cable ducting systems
for electrical installations -
Part 2-4: Particular requirements for service poles and service posts
Systèmes de goulottes Elektroinstallationskanalsysteme
et systèmes de conduits-profilés für elektrische Installationen -
pour installations électriques - Teil 2-4: Besondere Anforderungen
Partie 2-4: Règles particulières für freistehende Installationseinheiten
pour les colonnes et colonnettes

This European Standard was approved by CENELEC on 2009-05-01. 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, Bulgaria, 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: Avenue Marnix 17, B - 1000 Brussels

© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 50085-2-4:2009 E
---------------------- Page: 3 ----------------------
SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 2 –
Foreword

This European Standard was prepared by the Technical Committee CENELEC TC 213, Cable

management systems.

The text of the draft was submitted to the formal vote and was approved by CENELEC as

EN 50085-2-4 on 2009-05-01.
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) 2010-05-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2012-05-01

This European Standard is a system standard for cable management products used for electro-

technical purposes. It relates to Low Voltage Directive 2006/95/EC through consideration of the

essential requirements of this directive.

This European Standard is supported by separate standards to which references are made.

This Part 2-4 is to be used in conjunction with EN 50085-1:2005 “Cable trunking systems and cable

ducting systems for electrical installations – Part 1: General requirements”.

This Part 2-4 supplements or modifies the corresponding clauses of EN 50085-1:2005. Where a

particular clause or subclause of Part 1 is not mentioned in this Part 2-4, that clause or subclause of

Part 1 applies as far as is reasonable. Where this Part 2-4 states “addition” or “replacement”, the

relevant text of Part 1 is to be adapted accordingly.
NOTE The following numbering system is used:

– subclauses, tables and figures that are additional to those in Part 1 are numbered starting from 101;

– additional annexes are lettered AA, BB, etc.
__________

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,

OJ L 374, 27.12.2006, p. 10–19.
---------------------- Page: 4 ----------------------
SIST EN 50085-2-4:2009
– 3 – EN 50085-2-4:2009
Contents
Page

1 Scope ............................................................................................................................... 4

2 Normative re f e r enc es ........................................................................................................ 4

3 Definitions ........................................................................................................................ 5

4 General requirements ....................................................................................................... 5

5 General conditions for tests .............................................................................................. 5

6 Classification .................................................................................................................... 6

7 Marking and documentation .............................................................................................. 7

8 Dimensions ....................................................................................................................... 7

9 Construction ..................................................................................................................... 7

10 Mechanical properties ....................................................................................................... 8

11 Electrical properties ........................................................................................................ 15

12 Thermal properties ......................................................................................................... 16

13 Fire hazard ..................................................................................................................... 16

14 External influences ......................................................................................................... 16

15 Electromagnetic com patibility .......................................................................................... 17

Annex A (informative) Types of cable trunking systems (CTS) and cable ducting

systems (CDS) ...................................................................................................................... 22

Annex B (informative) A-deviations ....................................................................................... 22

Annex C (normative) CTS/CDS IK code ................................................................................ 22

Annex AA (normative) Use of test results according to EN 50085-2-4 for service poles

and service posts being part of a CTS/CDS intended for wall or ceiling mounting

covered by EN 50085-2-1 or floor mounting covered by EN 50085-2-2 ................................... 23

Annex AB (normative) Routine test for the socket outlets wiring of pre-wired service

poles and service posts (correct polarity and protection against electric shock) ...................... 26

Figures

Figure 101 − Types and application of service poles and service posts .................................. 19

Figure 102 – Detail of the cylinder for vertical load test in accordance with 10.5.103 .............. 20

Figure 103 – Detail of the circular plate for vertical load test in accordance with 10.5.104 ...... 21

Tables

Table AA.1 – EN 50085-2-1 ................................................................................................... 23

Table AA.2 – EN 50085-2-2 ................................................................................................... 24

Table AB.1 – Diagrammatic representation of routine tests to be applied to the socket

outlets wiring of pre-wired service poles and service posts .................................................... 26

---------------------- Page: 5 ----------------------
SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 4 –
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.

Service poles and service posts are intended to be mounted in free space and in contact with mounting

surface(s) only at one or two ends, where the word “mounted” means fixed or placed on the floor with a

weighted base or linked to a mounting surface through a flexible component.

NOTE Service poles and service posts can also be part of a CTS/CDS intended for wall or ceiling mounting covered by

Part 2-1 or floor mounting covered by Part 2-2 and are then also tested according to Part 2-1 and/or Part 2-2 as appropriate.

This European Standard does not apply to conduit systems, cable tray systems, cable ladder systems,

powertrack systems or equipment covered by other standards.

This European 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:
Add the following references:
EN 20535 1994 Paper and board – Determination of water absorptiveness – Cobb
method (ISO 535:1991)
EN 50085-1 2005 Cable trunking systems and cable ducting systems for electrical
installations – Part 1: General requirements

EN 60068-2-75 1997 Environmental testing – Part 2-75: Tests – Test Eh: Hammer tests

(IEC 60068-2-75:1997)

EN 60695-11-2 2003 Fire hazard testing – Part 11-2: Test flames – 1 kW nominal pre-mixed

flame – Apparatus, confirmatory test arrangement and guidance
(IEC 60695-11-2:2003)

EN 62262 2002 Degrees of protection provided by enclosures for electrical equipment

against external mechanical impacts (IK code) (IEC 62262:2002)
EN ISO 536 1996 Paper and board – Determination of grammage (ISO 536:1995)

ISO 9328-7 2004 Steel flat products for pressure purposes – Technical delivery conditions –

Part 7: Stainless steels
---------------------- Page: 6 ----------------------
SIST EN 50085-2-4:2009
– 5 – EN 50085-2-4:2009
3 Definitions
This clause of Part 1 is applicable except as follows:
Additional definitions:
3.101
service pole

CTS/CDS intended to be mounted in free space and in contact with mounting surfaces only at two

ends

NOTE 1 Service pole can be part of a CTS/CDS intended for wall, ceiling or floor mounting.

NOTE 2 The word “mounted” means fixed or placed on the floor with a weighted base or linked to a mounting surface through

a flexible component.
3.102
service post

CTS/CDS intended to be mounted in free space and in contact with mounting surface only at one end

NOTE 1 Service post can be part of a CTS/CDS intended for wall, ceiling or floor mounting.

NOTE 2 The word “mounted” means fixed or placed on the floor with a weighted base or linked to a mounting surface through

a flexible component.
3.103
pre-equipped service pole / service post

service pole / service post already assembled by the manufacturer or responsible vendor with one or

more electrical accessories and/or communication components
3.104
pre-wired service pole / service post

service pole / service post already assembled by the manufacturer or responsible vendor, wired by

means of insulated conductors and/or cables connecting one or more electrical accessories and/or

communication components
3.105
modular service pole / service post

service pole / service post which includes the assembly of two or more modules allowing to increase

the height or width or depth of the product
3.106
rated current, rated voltage

value assigned to a pre-wired and/or pre-equipped service pole / service post by the manufacturer and

to which operation and performances characteristics are referred
4 General requirements
This clause of Part 1 is applicable.
5 General conditions for tests
This clause of Part 1 is applicable except as follows:
5.1 Replace by:
5.1 Unless otherwise specified, tests according to this standard are type tests.
---------------------- Page: 7 ----------------------
SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 6 –
Additional subclause:

5.101 Unless otherwise specified in the relevant test, service poles / service posts are tested on the

longest version declared by the manufacturer and service poles / service posts which differ only by

being shorter than one which complies with the requirements for a given test are deemed to comply

with the requirements for the same test.
6 Classification
This clause of Part 1 is applicable except as follows:
6.4.1
This subclause of Part 1 is not applicable.
Additional subclauses:

6.101 According to floor treatment for service poles / service posts placed on the floor

6.101.1 Service poles / service posts for dry-treatment of floor
6.101.2 Service poles / service posts for wet-treatment of floor

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
---------------------- Page: 8 ----------------------
SIST EN 50085-2-4:2009
– 7 – EN 50085-2-4:2009
7 Marking and documentation
This clause of Part 1 is applicable except as follows:
7.3 Add the following three last indents:

- for modular service poles / service posts the constraints concerning the number or configuration

of assembled modules;
- whether non vertical mounting is allowed;

- whether the flexible component, if any, linking to the mounting surface is not part of the enclosure.

8 Dimensions
This clause of Part 1 is applicable except as follows:
Addition:
There are no dimensional requirements.
9 Construction
This clause of Part 1 is applicable except as follows:
9.1 Sharp edges
Replace the second paragraph by:

Compliance is checked by inspection using one sample, if necessary after cutting the samples apart.

Replace the fourth paragraph by:
Compliance is checked by inspection using one sample.
9.3 Means for protective separation and/or retention
Replace the second paragraph by:
Compliance is checked by the tests of 10.3 and 10.5.
Additional subclause:

9.101 Service poles / service posts which are likely to be moved during use shall be provided with

means to relieve conductors from strain in terminals or terminations.

NOTE A service pole with a weighted base is an example of service pole likely to be moved during use. A clamped service

pole is not considered likely to be moved during use.

When a cable anchorage is used, compliance is checked by inspection and by the test of 9.12.

Other means are checked by the following test.

After installation according to the manufacturer’s instructions a pull force of 100 N ± 2 N is applied to

this mean in the most unfavourable direction for 60 s ± 5 s.

During the application of the force there shall be no stress on insulated conductors.

---------------------- Page: 9 ----------------------
SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 8 –

9.102 Areas of service poles / service posts shall have adequate resistance to vertical load when

both following conditions are fulfilled:

• these areas are reasonably subjected to vertical load during installation and/or application. Some

areas of service poles or service posts are considered not to be subjected to vertical load due to

their dimensions or shape or height at least 100 mm above the floor;
• damage to these areas would impair mechanical or electrical safety.

Compliance is checked by the test of 10.5.103 and, when a resistance to vertical load through large

surface area is declared, by the test of 10.5.104.

9.103 Insulated conductors and/or cables used to connect electrical accessories and/or

communication components in pre-wired service poles / service posts shall be selected in accordance

with the rated voltage of the connected equipment and, in case of electrical accessories, its rated

current.
Compliance is checked by inspection.

9.104 Service poles / service posts placed on the floor declared according to 6.101.2 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:

- 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 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;

- method 3: providing appropriate sealing.

For method 1, compliance is checked by measurement. For method 2, compliance is checked by

inspection. For method 3, compliance is checked by the following test.

The test is made using the lower part of the service pole / service post fixed on a plywood board

16 mm thick, with a 50 mm minimum spacing between the sample and the edge of the support.

Ingress of water is detected by the use of dry absorbent paper positioned between the plywood board

and the sample. The absorbent paper is placed only in areas intended to accommodate insulated

conductors or live parts.

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 sample is placed carefully into a tray containing water to simulate a (10, 0/-1) mm height of water

on the floor.
NOTE For easy detection of water absorption, coloured water can be used.

After 15 s ± 1 s the sample is removed carefully from the tray and the exterior of the sample is

immediately wiped.
The service pole / service post is removed from the plywood board.
The absorbent paper shall show no trace of water absorption.
10 Mechanical properties
This clause of Part 1 is applicable except as follows:
10.2 Cable support test
This subclause of Part 1 is not applicable.
---------------------- Page: 10 ----------------------
SIST EN 50085-2-4:2009
– 9 – EN 50085-2-4:2009
10.3 Impact test
10.3.2 Impact test for installation and application
This subclause of Part 1 is applicable except as follows:
Replace the first paragraph by:

The test is carried out with the impact test values declared according to Table 6.

Replace in the last paragraph EN 50102 by EN 62262.
Addition:

10.3.2.101 The resistance to impact is checked on service poles / service posts including a flexible

component, if any, used to link the service pole / service post to the mounting surface if the flexible

component provides a safety function.

NOTE 1 Examples of safety function are retaining the service pole / service post or relieving conductors from strain or

providing an enclosure.
The test is carried out on an assembly consisting of

- for a service pole / service post not longer than 1 000 mm: a complete service pole / service post;

NOTE 2 The length to be considered does not take into account the flexible component if any.

- for a service pole / service post longer than 1 000 mm: one or more sections 1 000 mm ± 5 mm

long to simulate the various characteristics (function, design, material, …) within the service pole /

service post.

For service poles / service posts which differ only in length the test is carried out on the shortest and

the longest ones. Other service poles / service posts within the range are deemed to comply with the

requirements for this test.

For a service pole intended for vertical mounting, the test is carried out only on parts of the service pole

which will be lower than 1 500 mm above the floor when installed in accordance with manufacturer’s

instructions.
The assembly includes system components, if any, to simulate normal use.

Before the test, non-metallic system components and composite system components are aged at a

temperature declared according to Table 3 for 168 h ± 4 h continuously.

The test is carried out with the impact test values declared according to Table 6.

The impact test apparatus according to Clause 4 of EN 60068-2-75:1997, is mounted on a solid wall or

structure providing sufficient support.

For service poles, the assembly is placed horizontally in the impact test apparatus. In order to prevent

any movement of the ends, the assembly is secured at both ends. This method of securing should not

introduce a compressive force in the longitudinal axis of the assembly which would not exist in normal

application. Between both ends, the assembly is not supported and is free to move in the impact

direction.

Service posts are tested in their normal mounting position. The assembly is secured at the appropriate

end to prevent any movement of this end without any additional support. Products intended to be

mounted vertically are tested vertically whenever possible, otherwise they are tested horizontally.

---------------------- Page: 11 ----------------------
SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 10 –
No impact is applied to knockouts, membranes and the like.

When the assembly consists of a section, no impact is applied within 50 mm of any open end of the

assembly.

NOTE 3 When another system component has been included at an end of the assembly to prevent movement, this end is still

considered open.
Compliance is checked according to 10.3.2.104 after carrying the test of:

- 10.3.2.102 for service poles / service posts with declared minimum installation and application

temperature of +5 °C or higher;

- 10.3.2.103 for service poles / service posts with declared minimum installation and application

temperature lower than +5 °C.

10.3.2.102 The test is carried out at an ambient temperature of 20 °C ± 5 °C. The hammer is allowed

to fall so that an impact is applied as far as possible perpendicular to the accessible region of the

assembly likely to be the weakest.

10.3.2.103 The assemblies are placed in a cabinet at a temperature declared according to Table 2.

After 2 h, each assembly 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 assembly 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 assembly likely to

be the weakest. Compliance with impact applied before 10 s provides also compliance with this test of

the standard.

Instead of placing the assemblies in a cabinet and applying the impact at 12 s ± 2 s after the removal of

the assembly from the cabinet, it is allowed to apply the impact in a climatic chamber at a temperature

declared according to Table 2 on assemblies 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 assembly shall show no cracks or similar damage visible to normal or corrected vision without

magnification, and
- the assembly shall remain intact
such that safety is not impaired.

In case of doubt, the test of 14.1.3 is carried out on the impacted assemblies, with the exception of the

open ends, 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 to 6.7.3, if any, or the degree of

protection against access to hazardous parts indirectly declared by the manufacturer according to

6.7.1.

NOTE Any cracks in internal dividers which are not likely to impair electrical safety or use are ignored. Electrical safety can be

impaired by any of the following ways:

– when the impact creates a sharp edge on a partition which may damage insulated conductors or cables (see 9.1),

– when the impact decreases the protective separation between compartments in such a way that the protective separation

becomes ineffective (see 9.11).
---------------------- Page: 12 ----------------------
SIST EN 50085-2-4:2009
– 11 – EN 50085-2-4:2009
10.4 Linear deflection test

This test is only applicable to service poles / service posts intended to be mounted in a non vertical

position.
Compliance is checked by the following test.

The test is carried out on a complete service pole / service post mounted horizontally. If no

manufacturer's instructions for the orientation of the service pole / service post are provided, the test is

carried out in the most unfavourable orientation.

The test sample is subjected to an evenly distributed load of 1,0 g/mm² per metre length of the

declared usable area for cables.

The load consists of copper cables complying with class 5, Table 3 of HD 383 S2 or flexible insulated

conductors or cables of similar mass per meter which are placed in the sample.

Cables of 25 mm² nominal cross section are placed in the samples so that approximately 50 % of the

load is achieved.

Cables of 2,5 mm² nominal cross section are placed on top of the larger cables to achieve the total

load within a tolerance of ± 100 g.

To allow for settlement of the sample, a pre-load of approximately 10 % of the load is applied and

removed after approximately 5 min. The measurement apparatus is then calibrated to zero.

After 1 h (0 / + 5 min), with the load still applied, the deflection is measured:

- for service poles on the lower surface, at mid length and in the middle of the width;

- for service posts on the lower surface, at the free end and in the middle of the width.

The deflection shall not exceed:
- for service poles, 1 % of the length of the service pole;
- for service posts, 5 % of the length of the service post.

Access covers of the service pole / service post and cable separators shall remain adequately fixed so

as to fulfil their intended function and electrical safety shall not be impaired.

In case of doubt, the test of 14.1.3 is carried out on the loaded test 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, if any, or the degree of protection against access to hazardous parts

indirectly declared by the manufacturer according 6.7.1.
10.5 External load test
Additional subclauses:

10.5.101 Horizontal load test for service poles not likely to be moved during use

NOTE A clamped service pole is considered not likely to be moved during use. A service pole with a weighted base is an

example of service pole likely to be moved during use.

The test is carried out on a complete service pole mounted between two rigid parallel surfaces.

For service poles which differ only in length the test is carried out on the shortest and the longest ones.

Other service poles within the range are deemed to comply with the requirements for this test.

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SIST EN 50085-2-4:2009
EN 50085-2-4:2009 – 12 –
The service pole is mounted according to the manufacturer’s instruction.
For service poles intended to be clamped between floor and ceiling:

- unless otherwise specified in the manufacturer’s instructions, the test surfaces are of stainless

steel X5CrNi18-9, with a thickness of at least 2 mm according to ISO 9328-7, and a surface

quality of 2B, mounted on a rigid base, e.g. concrete;

- after mounting, the distance between floor and ceiling is increased by 5 mm ± 1 mm without any

further clamping of the service pole.

A push force of 400 N ± 20 N is applied perpendicular to the longitudinal axis of the sample in the most

unfavourable position and direction.

The force is applied for 60 s ± 5 s on a surface measuring approximately 80 mm × 80 mm using an

intermediate rigid element. If it is not possible to apply the force on an 80 mm × 80 mm surface using a

square intermediate element,
...

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