SIST EN 50626-1:2023

SLOVENSKI STANDARD
01-september-2023
Podzemni kanalski sistem za zaščito in upravljanje izoliranih električnih ali
komunikacijskih kablov - 1. del: Splošne zahteve
Conduit systems buried underground for the protection and management of insulated
electrical cables or communication cables - Part 1: General requirements
Erdverlegte Elektroinstallationsrohrsysteme für den Schutz und die Führung isolierter
elektrischer Kabel oder Fernmeldekabel – Teil 1: Allgemeine Anforderungen
Systèmes de conduits enterrés dans le sol pour la protection et la gestion des câbles
électriques isolés ou des câbles de communication - Partie 1: Exigences générales
Ta slovenski standard je istoveten z: EN 50626-1:2023
ICS:
29.120.10 Inštalacijske cevi za Conduits for electrical
električne namene purposes
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 50626-1
NORME EUROPÉENNE
EUROPÄISCHE NORM July 2023
ICS 29.120.10 Supersedes EN 61386-24:2010
English Version
Conduit systems buried underground for the protection and
management of insulated electrical cables or communication
cables - Part 1: General requirements
Systèmes de conduits enterrés dans le sol pour la Erdverlegte Elektroinstallationsrohrsysteme für den Schutz
protection et la gestion des câbles électriques isolés ou des und die Führung isolierter elektrischer Kabel oder
câbles de communication - Partie 1: Exigences générales Fernmeldekabel - Teil 1: Allgemeine Anforderungen
This European Standard was approved by CENELEC on 2021-10-25. 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 CEN-CENELEC
Management Centre 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 CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 50626-1:2023 E
Contents Page
European foreword . 4
Introduction . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirements . 8
5 General conditions for tests . 8
6 Classification . 9
6.1 According to mechanical properties . 9
6.1.1 Resistance to compression . 9
6.1.2 Resistance to impact . 9
6.1.3 Resistance to bending . 9
6.2 According to resistance to external influences . 10
6.2.1 Protection against ingress of solid objects . 10
6.2.2 Protection against ingress of water . 10
6.2.3 Resistance against corrosion (only applicable to metallic and composite
system components) . 10
6.3 According to resistance to flame propagation . 10
6.3.1 Non-flame propagating . 10
6.3.2 Flame propagating . 10
7 Marking and documentation . 10
8 Dimensions . 12
9 Construction . 13
10 Mechanical properties . 14
10.1 Mechanical strength . 14
10.2 Compression test . 14
10.3 Impact test . 15
10.4 Bending test . 16
11 Fire hazard . 17
11.1 Reaction to fire . 17
11.1.1 Spread of fire . 17
11.1.2 Additional reaction to fire characteristics . 21
12 External influences . 21
12.1 Degree of protection provided by enclosure . 21
12.1.1 General . 21
12.1.2 Degree of protection – Ingress of foreign solid objects . 21
12.1.3 Degree of protection – Ingress of water . 21
12.2 Resistance against corrosion . 21
13 Electromagnetic compatibility . 23
Annex A (normative) Determination of material thickness . 24
A.1 Material thickness of plain conduit . 24
A.2 Material thickness of corrugated conduit . 24
A.3 Material thickness of combined plain conduit and corrugated conduit . 25
A.4 Material thickness of plain conduit, with an intermediate corrugated layer . 25
Annex B (normative) Special national conditions . 26
Annex ZZ (informative) Relationship between this European standard and the safety
objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered . 27
Bibliography . 28
European foreword
This document (EN 50626-1:2023) has been prepared by CLC/TC 213, “Cable management systems”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024-01-21
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) 2026-07-21
conflicting with this document have to be
withdrawn
This document supersedes EN 61386-24:2010 and all of its amendments and corrigenda (if any).
— the scope has been modified for clarity and relationship with EN 50626-2;
— normative references have been updated;
— new definitions have been introduced;
— changes to general conditions for tests;
— changes to classifications;
— changes to tests for marking;
— changes to figure numbers;
— Clause 11 has been deleted and subsequent clauses renumbered;
— Clause 12 and Clause 13 have been replaced by new Clause 11.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the European
Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s)
/ Regulation(s).
For relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an integral part of this
document.
Any feedback and questions on this document should be directed to the users’ national committee. A complete
listing of these bodies can be found on the CENELEC website.
Introduction
CENELEC TC 213 is responsible for the development of the EN 50626 series, which consists of two separate
parts, both covering different products/applications.
This document covers requirements and tests for conduit systems buried underground for the protection and
management of insulated conductors and/or power cables or communication cables.
EN 50626-2 covers requirements and tests for conduit systems buried underground for the protection and
management of insulated conductors and/or power cables or communication cables having a specified
performance time and which are leak-tight solid wall conduit systems and manufactured in PE, PP and PVC-U.
A conduit system buried underground that conforms to this document is deemed to be safe for use.
This is a European 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 2014/35/EU through consideration of the essential requirements of this
directive.
This document is supported by separate standards to which references are made.
1 Scope
This document specifies requirements and tests for conduit systems with circular cross section buried
underground for the protection and management of insulated conductors and/or power cables or communication
cables installed individually or installed as a part of an assembly where the cable is installed by pulling or
pushing.
This document does not include requirements for leak-tightness according to EN ISO 13259 and performance
time.
NOTE 1 EN 50626-2 specifies requirements and tests for performance time and leak-tightness for solid wall conduit
systems made of PE, PP and PVC-U buried underground where the cables are installed by blowing or floating or conduits
are installed by trenchless methods.
NOTE 2 It is the responsibility of the purchaser or specifier to take into account any relevant national regulations and
installation practices or codes when selecting the products to be installed, based on the characteristics specified in this
document.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes
requirements of this document. For dated references, only the edition cited applies. For undated references, the
latest edition of the referenced document (including any amendments) applies.
Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN 60529:1991,
EN 60695-2-11:2014, Fire hazard testing - Part 2-11: Glowing/hot-wire based test methods - Glow-wire
flammability test method for end-products (GWEPT) (IEC 60695-2-11:2014)
EN 60695-11-2:2017, Fire hazard testing - Part 11-2: Test flames - 1 kW nominal pre-mixed flame - Apparatus,
confirmatory test arrangement and guidance (IEC 60695-11-2:2013)
ISO 2768-1:1989, General tolerances — Part 1: Tolerances for linear and angular dimensions without individual
tolerance indications
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
3.1
conduit system
cable management system consisting of conduits and conduit fittings for the protection and management of
insulated conductors and/or cables in electrical or communication installations, allowing them to be drawn in
and/or replaced, but not to be inserted laterally
___________
As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
3.2
conduit
part of conduit system of circular cross-section for insulated conductors and/or cables in electrical or
communication installations, allowing them to be drawn in and/or replaced
3.3
conduit fitting
device designed to join components of a conduit system, or for them to change direction
3.4
terminating conduit fitting
conduit fitting that terminates a conduit system
3.5
metallic conduit and/or conduit fitting
conduit or conduit fitting which consists of metal only
3.6
non-metallic conduit and/or conduit fitting
conduit or conduit fitting which consists uniquely of non-metallic material and which has no metallic components
whatsoever
3.7
composite conduit and/or conduit fitting
conduit or conduit fitting comprising both metallic and non-metallic materials
3.8
non-flame propagating conduit and/or conduit fitting
conduit or conduit fitting which is liable to catch fire as a result of an applied flame, but in which the flame does
not propagate, and which extinguishes itself within a limited time after the flame is removed
3.9
plain conduit
conduit in which the profile is even in the longitudinal section
Note 1 to entry: The intermediate layer of a plain conduit can be corrugated.
Note 2 to entry: A typical example is shown in Figures A.1 and A.4.
3.10
corrugated conduit
conduit in which the profile is corrugated in the longitudinal section
Note 1 to entry: Both annular and helical corrugated conduits are permissible.
Note 2 to entry: A typical example is shown in Figure A.2
3.11
combined corrugated conduit and plain conduit
conduit in which the internal side is plain and external side is corrugated
Note 1 to entry: A typical example is shown in Figure A.3.
3.12
rigid conduit
conduit which cannot be bent, or which can only be bent with the help of a mechanical aid, with or without
special treatment
3.13
pliable conduit
conduit which can be bent by hand with reasonable force, and which is not intended for frequent flexing
3.14
external influence
factors which could affect the conduit system
Note 1 to entry: Examples of such factors are a presence of water, oil or building materials, low and high temperatures,
and corrosive or polluting substances.
3.15
hygroscopic material
material having the characteristic of enabling attraction or holding water greater than 1,0 % by weight of the
material from the surrounding environment at 23 °C and 50 % relative humidity
3.16
type test
test of one or more conduits or conduit fittings made to a certain design to show that the design meets certain
specifications
4 General requirements
4.1 Conduit and conduit fittings shall be so designed and constructed that in normal use their performance is
reliable and they provide protection to the user or surroundings.
When assembled in accordance with manufacturer's instructions as part of a conduit system, conduits and
conduit fittings shall provide mechanical and, where required, electrical protection of the insulated conductors
and cables contained therein.
4.2 The protective properties of the joint between the conduit and conduit fitting shall not be less than that
declared for the conduit system.
4.3 Conduit and conduit fittings shall withstand the stresses likely to occur during transport, storage,
recommended installation practice and application.
4.4 Compliance is checked by carrying out all specified tests.
5 General conditions for tests
Tests in accordance with this document are type tests. Conduit systems, having the same classification, which
can vary in colour only, shall be the same product type.
Where the conduit entries are part of the detachable or loose type conduit fitting, the detachable conduit fitting
shall be capable of being assembled again, after the test, according to the manufacturer's instructions without
loss of the declared properties according to Clause 6.
When toxic or hazardous processes are used, precautions shall be taken to safeguard the test personnel.
Unless otherwise specified in this document,
— three samples are subjected to the tests, and the requirements are satisfied if the tests are met. If only one
of the samples does not satisfy a test, due to an assembly or a manufacturing defect, that test and any
preceding one which could have influenced the result of the test shall be repeated, and also the tests which
follow shall be carried out in the required sequence on another full set of samples, all of which shall comply
with the requirements;
NOTE 1 If the additional set of samples is not submitted at the same time, a failure of one sample will entail a
rejection. The applicant, when submitting the first set of samples, can also submit an additional set of samples which
can be used, if one sample fails. The testing station will then, without further request, test the additional set of samples
and will reject them only if a further failure occurs.
— the tests shall be carried out within 1 min after conditioning and at an ambient temperature of (20 ± 5) °C;
— each test shall be made on three new samples, which may be taken from one length;
NOTE 2 Certain tests, for instance the checking of dimensions, do not affect a change in the property of the
samples; therefore, these samples are considered as new samples and can be used for further tests.
— samples of conduits and conduit fittings shall be conditioned for at least 24 h, at a temperature of (23 ± 2)
°C. Samples of conduits and conduit fittings made of material with hygroscopic behaviour shall be
conditioned for at least 240 h, at a temperature of (23 ± 2) °C and a relative humidity between 40 % and
60 %;
— the samples for each test shall be in a clean and new condition, with all parts in place and mounted as in
normal use. After checking dimensions in accordance with Clause 8, and unless otherwise specified in the
relevant test, the conduit fittings shall be assembled with the lengths of conduit of the type for which they
are intended, as defined in the relevant test. Due regard shall be taken of the manufacturer's instructions,
especially where force is required in the assembly of the joint.
NOTE 3 Where similarities are claimed, the selection of representative fittings for test purposes can be agreed
between the manufacturer, or responsible vendor, and the testing station.
6 Classification
6.1 According to mechanical properties
6.1.1 Resistance to compression
6.1.1.1 Type 250 (code 250)
NOTE A conduit system according to 6.1.1.1 is intended to be installed with additional precautions as specified in the
relevant national regulations.
6.1.1.2 Type 450 (code 450)
NOTE A conduit system according to 6.1.1.2 is intended to be directly buried underground without additional
precautions.
6.1.1.3 Type 750 (code 750)
NOTE A conduit system according to 6.1.1.3 is intended to be directly buried underground without additional
precautions.
6.1.2 Resistance to impact
6.1.2.1 Light (code L)
6.1.2.2 Normal (code N)
6.1.3 Resistance to bending
6.1.3.1 Rigid
6.1.3.2 Pliable
6.2 According to resistance to external influences
6.2.1 Protection against ingress of solid objects
Protection in accordance with EN 60529 to a minimum of IP3X.
6.2.2 Protection against ingress of water
Protection in accordance with EN 60529 to a minimum of IPX0.
6.2.3 Resistance against corrosion (only applicable to metallic and composite system components)
6.2.3.1 Without protection
6.2.3.2 With protection as detailed in Table 4
6.3 According to resistance to flame propagation
6.3.1 Non-flame propagating
6.3.2 Flame propagating
NOTE Conduit systems according to this document are normally flame propagating. Non-flame propagating conduit
systems might be required for some applications.
7 Marking and documentation
7.1 Each conduit shall be marked with the following information as a minimum:
— the manufacturer's or responsible vendor's name or trade mark or identification mark;
— a product identification mark, which may be, for example, the code of this document, a catalogue number,
a symbol or the like, in such a way that it can be identified in the manufacturer’s or responsible vendor’s
literature;
— the code “L” or “N” according to 6.1.2;
— the code “250”, “450” or “750” according to 6.1.1. This code shall be marked immediately after the code” L”
or “N”.
The following requirements apply for products with conduits inside another conduit:
— If the external conduit is marked according to this document, it is not required any marking for the inside
conduits,
— If the external conduit is not marked according to this document, all inside conduits shall be marked
according to this document.
7.1.1 The manufacturer shall be responsible for indicating the compatibility of parts within a conduit system.
NOTE Compatibility comprises mechanical compatibility of parts and also avoidance of galvanic couples within metallic
parts of the system.
7.1.2 The manufacturer shall provide in his literature its classification in accordance with Clause 6 and all
information necessary for the proper and safe transport, storage, installation and use.
7.2 The conduit fitting shall be marked in accordance with 7.1, on the product wherever possible, but, where
this is impractical, then the mark may be on a label attached to the product, or on the smallest supplied package.
7.3 Conduits shall be marked according to 7.1 at regular intervals along their length of preferably 1 m but not
longer than 3 m.
7.4 Compliance with 7.1 and 7.2 is checked by inspection. Compliance with 7.3 is checked by inspection and
measurement.
7.5 The marking shall be durable and clearly legible.
Compliance is checked by inspection, using normal or corrected vision, without additional magnification and by
rubbing the marking for 15 s with a piece of cotton cloth soaked with water and again for 15 s with a piece of
cotton cloth soaked with n-hexane 95 % (Chemical Abstracts Service Registry Number, CAS RN, 110-54-3).
NOTE n-hexane 95 % (Chemical Abstracts Service Registry Number, CAS RN, 110–54–3) is available from a variety
of chemical suppliers as a high pressure liquid chromatography (HPLC) solvent.
When using the liquid specified for the test, precautions as stated in the relative material safety datasheet
provided by the chemical supplier shall be taken to safeguard the laboratory technicians.
Laser marking directly on the product and marking made by moulding, pressing or engraving are not subjected
to this test.
The marking surface to be tested shall be dried before rubbing the marking with n-hexane 95 % solvent.
Rubbing shall commence immediately after soaking the piece of cotton, applying a compression force of (5 ± 1)
N at a rate of about one cycle per second (a cycle comprising a forward and backward movement along the
length of the marking). For markings longer than 20 mm, rubbing can be limited to a part of the marking, over a
path of at least 20 mm length.
The compression force is applied by means of a test piston which is wr
...