kSIST FprEN 50626-1:2021

Conduit systems buried underground for the protection and management of insulated electrical cables or communication cables - Part 1: General requirements

This European Standard specifies general requirements and tests for conduit systems buried underground for the protection and management of insulated conductors and/or power cables or communication cables.
This European Standard is applicable to conduits with circular cross section.
The requirements described in this standard are applicable to all conduits
-   installed individually or installed as a part of an assembly;
-   where the cable is installed by pulling or pushing.
prEN 50626-2 specifies particular requirements and tests that are required for special applications.
NOTE    Examples of special applications include special pipe installation techniques, and alternative cable installation techniques are trenchless installation.

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

La présente Norme européenne spécifie les exigences générales et les essais applicables aux systèmes de conduits enterrés dans le sol pour la protection et le rangement des conducteurs isolés et/ou des câbles d’alimentation ou des câbles de communication.
La présente Norme européenne s’applique aux conduits de section droite circulaire.
Les exigences spécifiées dans la présente norme s’appliquent à tous les conduits
-   installés individuellement ou installés comme éléments d’un assemblage;
-   dont le câble est installé par tirage ou insertion.
Le projet de Norme européenne prEN 50626-2 spécifie les exigences particulières et les essais qui sont exigés pour les applications spéciales.
NOTE    Les applications spéciales incluent, par exemple, les techniques spéciales d’installation de conduits; les techniques alternatives d’installation de câbles sont des techniques d’installation sans tranchée.

Podzemni kanalski sistem za zaščito in upravljanje izoliranih električnih ali komunikacijskih kablov - 1. del: Splošne zahteve

General Information

• Status: Not Published
• Public Enquiry End Date: 17-Sep-2020
• ICS: 29.120.10 - Conduits for electrical purposes
• Technical Committee: I11 - Imaginarni 11
• Current Stage: 5020 - Formal vote (FV) (Adopted Project)
• Start Date: 27-Jul-2021
• Due Date: 14-Sep-2021
• 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)
• Directive: 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 limits
• Mandate: M/490 - Standardisation mandate to the European Standardisation Organisations (ESOs) to support European Smart Grid deployment
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: FprEN 50626-1 - Conduit systems buried underground for the protection and management of insulated electrical cables or communication cables - Part 1: General requirements

RELATIONS

• Revised: SIST EN 61386-24:2010 - Conduit systems for cable management - Part 24: Particular requirements - Conduit systems buried underground (IEC 61386-24:2004)
• Effective Date: 06-May-2014
• Replaces: SIST EN 61386-24:2010 - Conduit systems for cable management - Part 24: Particular requirements - Conduit systems buried underground (IEC 61386-24:2004)
• Effective Date: 19-Jun-2012

Standards Content (sample)

SLOVENSKI STANDARD
oSIST prEN 50626-1:2020
01-september-2020
Nadomešča:
SIST EN 61386-24:2010
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: prEN 50626-1
ICS:
29.120.10 Inštalacijske cevi za Conduits for electrical
električne namene purposes
oSIST prEN 50626-1:2020 en

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

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oSIST prEN 50626-1:2020
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oSIST prEN 50626-1:2020
EUROPEAN STANDARD DRAFT
prEN 50626-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2020
ICS 29.120.10 Will supersede EN 61386-24:2010 and all of its
amendments and corrigenda (if any)
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 draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2020-09-17.
It has been drawn up by CLC/TC 213.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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,

Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to

provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and

shall not be referred to as a European Standard.
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

© 2020 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Project: 24279 Ref. No. prEN 50626-1 E
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Contents Page

1 European foreword ................................................................................................................. 4

2 Introduction............................................................................................................................. 5

3 1 Scope ............................................................................................................................... 6

4 2 Normative references ....................................................................................................... 6

5 3 Terms and definitions ....................................................................................................... 6

6 4 General requirements ....................................................................................................... 8

7 5 General conditions for tests .............................................................................................. 8

8 6 Classification .................................................................................................................... 9

9 6.1 According to mechanical properties ......................................................................... 9

10 6.1.1 Resistance to compression .......................................................................... 9

11 6.1.2 Resistance to impact ................................................................................... 9

12 6.1.3 Resistance to bending ................................................................................. 9

13 6.2 According to resistance to external influences ......................................................... 9

14 6.2.1 Protection against ingress of solid objects ................................................... 9

15 6.2.2 Protection against ingress of water .............................................................. 9

16 6.2.3 Resistance against corrosion (only applicable to metallic and

17 composite system components) ................................................................. 10

18 6.3 According to resistance to flame propagation ........................................................ 10

19 6.3.1 Non-flame propagating .............................................................................. 10

20 6.3.2 Flame propagating ..................................................................................... 10

21 7 Marking and documentation ............................................................................................ 10

22 8 Dimensions .................................................................................................................... 12

23 9 Construction ................................................................................................................... 13

24 10 Mechanical properties .................................................................................................... 13

25 10.1 Mechanical strength .............................................................................................. 13

26 10.2 Compression test .................................................................................................. 13

27 10.3 Impact test ............................................................................................................ 14

28 10.4 Bending test .......................................................................................................... 16

29 11 Fire hazard ..................................................................................................................... 17

30 11.1 Reaction to fire ...................................................................................................... 17

31 11.1.1 Spread of fire ............................................................................................ 17

32 11.1.2 Additional reaction to fire characteristics ................................................... 21

33 12 External influences ......................................................................................................... 21

34 12.1 Degree of protection provided by enclosure ........................................................... 21

35 12.1.1 General ..................................................................................................... 21

36 12.1.2 Degree of protection – Ingress of foreign solid objects ............................... 21

37 12.1.3 Degree of protection – Ingress of water ..................................................... 21

38 12.2 Resistance against corrosion ................................................................................. 21

39 13 Electromagnetic compatibility ......................................................................................... 23

40 Annex A (normative) Determination of material thickness ..................................................... 24

41 A.1 Material thickness of plain conduit .................................................................................. 24

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42 A.2 Material thickness of corrugated conduit ......................................................................... 24

43 A.3 Material thickness of combined plain conduit and corrugated conduit ............................. 24

44 A.4 Material thickness of combined plain conduit, corrugated conduit and plain conduit ........ 25

45 Annex ZZ (informative) Relationship between this European standard and the safety

46 objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered .......................... 26

47 Bibliography .......................................................................................................................... 27

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49 European foreword

50 This document (prEN 50626-1:2020) has been prepared by CLC/TC 213, “Cable management

51 systems”.
52 This document is currently submitted to the second Enquiry.
53 The following dates are proposed:
• latest date by which the existence of this (doa) dor + 6 months
document has to be announced at national level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)

54 This document will supersede EN 61386-24:2010 and all of its amendments and corrigenda (if any).

55 This document has been prepared under a mandate given to CENELEC by the European Commission

56 and the European Free Trade Association, and supports essential requirements of EU Directive(s).

57 For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

58 document.
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59 Introduction

60 CENELEC TC 213 is responsible for the development of the EN 50626 series, which consists of two

61 separate parts, each covering different products/applications.

62 This document covers requirements and tests for conduit systems buried underground for the protection

63 and management of insulated conductors and/or power cables or communication cables.

64 prEN 50626-2 covers requirements and tests for conduit systems buried underground for the protection

65 and management of insulated conductors and/or power cables or communication cables having a

66 specified performance time and which are leak-tight solid wall conduit systems and manufactured in PE,

67 PP and PVC-U.

68 A conduit system buried underground that conforms to this document is deemed to be safe for use.

69 This is a European Standard for cable management products used for electro-technical purposes. It

70 relates to the Council Directives on the approximation of laws, regulations and administrative provisions

71 of the Member States relating to Low Voltage Directive 2014/35/EU through consideration of the

72 essential requirements of this directive.

73 This document is supported by separate standards to which references are made.

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74 1 Scope

75 This document specifies requirements and tests for conduit systems with circular cross section buried

76 underground for the protection and management of insulated conductors and/or power cables or

77 communication cables installed individually or installed as a part of an assembly where the cable is

78 installed by pulling or pushing.

79 This document does not include requirements for leak-tightness according to EN ISO 13259 and

80 performance time.

81 NOTE 1 prEN 50626-2 specifies requirements and tests for performance time and leak-tightness for solid wall

82 conduit systems made of PE, PP and PVC-U buried underground where the cables are installed by blowing or

83 floating or conduits are installed by trenchless methods.

84 NOTE 2 It is the responsibility of the purchaser or specifier to take into account any relevant national regulations

85 and installation practices or codes when selecting the products to be installed, based on the characteristics specified

86 in this document.
87 2 Normative references

88 The following documents are referred to in the text in such a way that some or all of their content

89 constitutes requirements of this document. For dated references, only the edition cited applies. For

90 undated references, the latest edition of the referenced document (including any amendments) applies.

91 EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

92 EN 60695-2-11:2014, Fire hazard testing — Part 2-11: Glowing/hot-wire based test methods — Glow-

93 wire flammability test method for end-products (GWEPT) (IEC 60695-2-11:2014)

94 EN 60695-11-2:2014, Fire hazard testing — Part 11-2: Test flames — 1 kW nominal pre-mixed flame —

95 Apparatus, confirmatory test arrangement and guidance (IEC 60695-11-2:2013)

96 ISO 2768-1:1989, General tolerances — Part 1: Tolerances for linear and angular dimensions without

97 individual tolerance indications
98 3 Terms and definitions
99 For the purposes of this document, the following terms and definitions apply.

100 ISO and IEC maintain terminological databases for use in standardization at the following addresses:

101 — ISO Online browsing platform: available at https://www.iso.org/obp
102 — IEC Electropedia: available at http://www.electropedia.org/
103 3.1
104 conduit system

105 cable management system consisting of conduits and conduit fittings for the protection and management

106 of insulated conductors and/or cables in electrical or communication installations, allowing them to be

107 drawn in and/or replaced, but not to be inserted laterally
108 3.2
109 conduit

110 part of conduit system of circular cross-section for insulated conductors and/or cables in electrical or

111 communication installations, allowing them to be drawn in and/or replaced
___________
As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
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112 3.3
113 conduit fitting

114 device designed to join components of a conduit system, or for them to change direction

115 3.4
116 terminating conduit fitting
117 conduit fitting that terminates a conduit system
118 3.5
119 metallic conduit and/or conduit fitting
120 conduit or conduit fitting which consists of metal only
121 3.6
122 non-metallic conduit and/or conduit fitting

123 conduit or conduit fitting which consists uniquely of non-metallic material and which has no metallic

124 components whatsoever
125 3.7
126 composite conduit and/or conduit fitting

127 conduit or conduit fitting comprising both metallic and non-metallic materials

128 3.8
129 non-flame propagating conduit and/or conduit fitting

130 conduit or conduit fitting which is liable to catch fire as a result of an applied flame, but in which the

131 flame does not propagate, and which extinguishes itself within a limited time after the flame is removed

132 3.9
133 plain conduit
134 conduit in which the profile is even in the longitudinal section

135 Note 1 to entry: Both annular and helical corrugated conduits are permissible, and a combination of both

136 corrugated and plain conduit is possible.
137 3.10
138 corrugated conduit
139 conduit in which the profile is corrugated in the longitudinal section

140 Note 1 to entry: Both annular and helical corrugated conduits are permissible, and a combination of both

141 corrugated and plain conduit is possible.
142 3.11
143 rigid conduit

144 conduit which cannot be bent, or which can only be bent with the help of a mechanical aid, with or

145 without special treatment
146 3.12
147 pliable conduit

148 conduit which can be bent by hand with reasonable force, and which is not intended for frequent flexing

149 3.13
150 external influence
151 factors which could affect the conduit system

152 Note 1 to entry: Examples of such factors are a presence of water, oil or building materials, low and high

153 temperatures, and corrosive or polluting substances.
154 3.14
155 hygroscopic material

156 material having the characteristic of enabling attraction or holding water greater than 1,0 % by weight of

157 the material from the surrounding environment at 23 °C and 50 % relative humidity

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158 4 General requirements

159 4.1 Conduit and conduit fittings shall be so designed and constructed that in normal use their

160 performance is reliable and they provide protection to the user or surroundings.

161 When assembled in accordance with manufacturer's instructions as part of a conduit system, conduits

162 and conduit fittings shall provide mechanical and, where required, electrical protection of the insulated

163 conductors and cables contained therein.

164 4.2 The protective properties of the joint between the conduit and conduit fitting shall not be less than

165 that declared for the conduit system.

166 4.3 Conduit and conduit fittings shall withstand the stresses likely to occur during transport, storage,

167 recommended installation practice and application.
168 4.4 Compliance is checked by carrying out all specified tests.
169 5 General conditions for tests

170 Tests in accordance with this document are type tests. Conduit systems, having the same classification,

171 which can vary in colour only, shall be the same product type.

172 Where the conduit entries are part of the detachable or loose type conduit fitting, the detachable conduit

173 fitting shall be capable of being assembled again, after the test, according to the manufacturer's

174 instructions without loss of the declared properties according to Clause 6.

175 When toxic or hazardous processes are used, precautions shall be taken to safeguard the test

176 personnel.
177 Unless otherwise specified in this document,

178 — three samples are subjected to the tests, and the requirements are satisfied if the tests are met. If

179 only one of the samples does not satisfy a test, due to an assembly or a manufacturing defect, that

180 test and any preceding one which could have influenced the result of the test shall be repeated,

181 and also the tests which follow shall be carried out in the required sequence on another full set of

182 samples, all of which shall comply with the requirements;

183 NOTE 1 If the additional set of samples is not submitted at the same time, a failure of one sample will entail

184 a rejection. The applicant, when submitting the first set of samples, can also submit an additional set of

185 samples which can be used, if one sample fails. The testing station will then, without further request, test the

186 additional set of samples and will reject them only if a further failure occurs.

187 — the tests shall be carried out within 1 min after conditioning and at an ambient temperature of

188 (20 ± 5) °C;

189 — each test shall be made on three new samples, which may be taken from one length;

190 NOTE 2 Certain tests, for instance the checking of dimensions, do not affect a change in the property of

191 the samples; therefore, these samples are considered as new samples and can be used for further tests.

192 — samples of conduits and conduit fittings shall be conditioned for at least 24 h, at a temperature of

193 (23 ± 2) °C. Samples of conduits and conduit fittings made of material with hygroscopic behaviour

194 shall be conditioned for at least 240 h, at a temperature of (23 ± 2) °C and a relative humidity

195 between 40 % and 60 %;

196 — the samples for each test shall be in a clean and new condition, with all parts in place and mounted

197 as in normal use. After checking dimensions in accordance with Clause 8, and unless otherwise

198 specified in the relevant test, the conduit fittings shall be assembled with the lengths of conduit of

199 the type for which they are intended, as defined in the relevant test. Due regard shall be taken of

200 the manufacturer's instructions, especially where force is required in the assembly of the joint.

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201 NOTE 3 Where similarities are claimed, the selection of representative fittings for test purposes can be

202 agreed between the manufacturer, or responsible vendor, and the testing station.

203 6 Classification
204 6.1 According to mechanical properties
205 6.1.1 Resistance to compression
206 6.1.1.1 Type 250 (code 250)

207 NOTE A conduit system according to 6.1.1.1 is intended to be installed with additional precautions as specified

208 in the relevant national regulations.
209 6.1.1.2 Type 450 (code 450)

210 NOTE A conduit system according to 6.1.1.2 is intended to be directly buried underground without additional

211 precautions.
212 6.1.1.3 Type 750 (code 750)

213 NOTE A conduit system according to 6.1.1.3 is intended to be directly buried underground without additional

214 precautions.
215 6.1.2 Resistance to impact
216 6.1.2.1 Light (code L)
217 6.1.2.2 Normal (code N)
218 6.1.3 Resistance to bending
219 6.1.3.1 Rigid
220 6.1.3.2 Pliable
221 6.2 According to resistance to external influences
222 6.2.1 Protection against ingress of solid objects
223 Minimum of IP3X
224 6.2.2 Protection against ingress of water
225 Minimum of IPX0
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226 6.2.3 Resistance against corrosion (only applicable to metallic and composite system

227 components)
228 6.2.3.1 Without protection
229 6.2.3.2 With protection as detailed in Table 4
230 6.3 According to resistance to flame propagation
231 6.3.1 Non-flame propagating
232 6.3.2 Flame propagating

233 NOTE Conduit systems to this document are normally flame propagating. Non-flame propagating conduit

234 systems might be required for some applications.
235 7 Marking and documentation

236 7.1 Each conduit shall be marked with the following information as a minimum:

237 — the manufacturer's or responsible vendor's name or trade mark or identification mark;

238 — a product identification mark, which may be, for example, the code of this document, a catalogue

239 number, a symbol or the like, in such a way that it can be identified in the manufacturer’s or

240 responsible vendor’s literature;
241 — the code “L” or “N” according to 6.1.2;

242 — the code “250”, “450” or “750” according to 6.1.1. This code shall be marked immediately after the

243 code” L” or “N”.

244 7.1.1 The manufacturer shall be responsible for indicating the compatibility of parts within a conduit

245 system.

246 7.1.2 The manufacturer shall provide in his literature its classification in accordance with Clause 6

247 and all information necessary for the proper and safe transport, storage, installation and use.

248 7.2 The conduit fitting shall be marked in accordance with 7.1, on the product wherever possible, but,

249 where this is impractical, then the mark may be on a label attached to the product, or on the smallest

250 supplied package.

251 7.3 Conduits shall be marked according to 7.1 at regular intervals along their length of preferably 1 m

252 but not longer than 3 m.

253 7.4 Compliance with 7.1 and 7.2 is checked by inspection. Compliance with 7.3 is checked by

254 inspection and measurement.
255 7.5 The marking shall be durable and clearly legible.

256 Compliance is checked by inspection, using normal or corrected vision, without additional magnification

257 and by rubbing the marking for 15 s with a piece of cotton cloth soaked with water and again for 15 s

258 with a piece of cotton cloth soaked with n-hexane 95 % (Chemical Abstracts Service Registry Number,

259 CAS RN, 110-54-3).

260 NOTE n-hexane 95 % (Chemical Abstracts Service Registry Number, CAS RN, 110–54–3) is available from

261 a variety of chemical suppliers as a high pressure liquid chromatography (HPLC) solvent.

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262 When using the liquid specified for the test, precautions as stated in the relative material safety

263 datasheet provided by the chemical supplier shall be taken to safeguard the laboratory technicians.

264 Laser marking directly on the product and marking made by moulding, pressing or engraving are not

265 subjected to this test.

266 Products complying with a previous edition of the standard need not be tested again as this requirement

267 does not have impact on the safety of the product.

268 The marking surface to be tested shall be dried before rubbing the marking with n-hexane 95 % solvent.

269 Rubbing shall commence immediately after soaking the piece of cotton, applying a compression force

270 of (5 ± 1) N at a rate of about one cycle per second (a cycle comprising a forward and backward

271 movement along the length of the marking). For markings longer than 20 mm, rubbing can be limited to

272 a part of the marking, over a path of at least 20 mm length.

273 The compression force is applied by means of a test piston which is wrapped with cotton comprising of

274 cotton wool covered by a piece of cotton medical gauze.

275 The test piston shall have the dimensions given in Figure 1 and shall be made of an elastic material

276 which is inert against the test liquids and has a Shore-A hardness of 47 ± 5 (for example synthetic

277 rubber).
Dimensions
A B C
20 20 2
278 Key
A diameter of piston
B head radius
279 Figure 1 — Test piston and dimensions for rubbing test of marking

280 When it is not possible to carry out the test on the specimens due to the shape/size of the product, a

281 suitable piece having the same characteristics as the product can be submitted to the test.

282 After the test, the marking shall be legible.

283 7.6 The manufacturer shall provide in his literature all information necessary for the proper and safe

284 installation and use.

285 In addition, for conduit systems according to 6.1.1.1, the manufacturer shall give instruction for

286 installation precautions following the relevant national technical rules, if any.

287 7.7 In assemblies of identical conduits manufactured in the same extrusion process, at least one

288 conduit shall be marked with the above information.

289 NOTE Wrapping for transportation and installation is not considered as a protective conduit.

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290 In assemblies of non-identical conduits manufactured both in the same process or in a different process,

291 each individual conduit shall be marked with the above information. As an alternative, in assemblies

292 comprising conduits of small size inside another conduit, all the required could be marked on the external

293 conduit.
294 8 Dimensions
295 Conduit dimensions should preferably be according to Table 1.
296 Table 1 — Conduits diameters
Nominal size Nominal outside Tolerances Min. inside
mm diameter mm diameter
mm mm
25 25 + 0,5 18
32 32 + 0,6 24
40 40 + 0,8 30
50 50 + 1,0 37
63 63 + 1,2 47
75 75 + 1,4 56
90 90 + 1,7 67
110 110 + 2,0 82
125 125 + 2,3 94
140 140 + 2,6 106
160 160 + 2,9 120
180 180 + 3,3 135
200 200 + 3,6 150
225 225 +4,1 170
250 250 + 4,5 188
NOTE The nominal outside diameters are taken from ISO 161-1.
Tolerances on outside diameters (OD) are given as follows:
OD min: nominal outside diameter;

OD max: nominal outside diameter + (0,018 x nominal outside diameter values) rounded up to

0,1 mm.
Minimum inside diameter: nominal outside diameter divided by 1,33.
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297 Compliance of the minimum inside diameter is checked by measurement according to two perpendicular

298 diameters on the same section and calculating the average value.

299 Compliance of the outside diameter is checked using a ring gauge or any suitable method.

300 9 Construction

301 9.1 Within the conduit system, there shall be no inadequate edges, burrs or surface projections which

302 are likely to damage insulated conductors or cables, or inflict injury on the installer or user.

303 Compliance is checked by inspection, if necessary after cutting the samples apart.

304 9.2 Screws, if any, used for attaching components or covers t
...

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oSIST prEN 50626-1:2017
01-april-2017
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SIST EN 61386-24:2010
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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 protection et la gestion des câbles

électriques isolés ou des câbles de communication - Partie 1: Exigences générales

Ta slovenski standard je istoveten z: prEN 50626-1:2017
ICS:
29.120.10 ,QãWDODFLMVNHFHYL]D Conduits for electrical
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oSIST prEN 50626-1:2017 en

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

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oSIST prEN 50626-1:2017
EUROPEAN STANDARD DRAFT
prEN 50626-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2017
ICS 29.120.10 Will supersede 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
protection et la gestion des câbles électriques isolés ou des
câbles de communication - Partie 1: Exigences générales
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2017-04-21.
It has been drawn up by CLC/TC 213.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,

Switzerland, Turkey and the United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to

provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and

shall not be referred to as a European Standard.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Project: 24279 Ref. No. prEN 50626-1:2017 E
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Contents Page

1 European foreword .................................................................................................................................3

2 1 Scope ................................................................................................................................................4

3 2 Normative references ......................................................................................................................4

4 3 Terms and definitions .....................................................................................................................4

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

6 5 General conditions for tests ...........................................................................................................6

7 6 Classification ...................................................................................................................................7

8 7 Marking and documentation ..........................................................................................................8

9 8 Dimensions ......................................................................................................................................9

10 9 Construction ................................................................................................................................. 11

11 10 Mechanical properties ..................................................................................................................11

12 11 Fire hazard .................................................................................................................................... 13

13 12 External influences ...................................................................................................................... 15

14 13 Electromagnetic compatibility .................................................................................................... 17

15 Annex A (normative) Determination of material thickness ............................................................. 22

16 Annex ZZ (informative) Relationship between this European Standard and the safety

17 objectives of Directive 2014/35/EU [2014 OJ L96] aimed to be covered ................................ 24

18 Bibliography ......................................................................................................................................... 25

20 Tables

21 Table 1 — Conduits diameters .............................................................................................. 10

22 Table 2 — Impact test energy values .................................................................................... 12

23 Table 3 — Times of exposure of the sample to the flame ...................................................... 14

24 Table 4 — Resistance to corrosion classification .................................................................. 16

25 Table ZZ.1 — Correspondence between this European Standard and Annex I of

26 Directive 2014/35/EU [2014 OJ L96] ............................................................................... 24

28 Figures

29 Figure 1 — Test piston and dimensions for rubbing test of marking ....................................... 17

30 Figure 2 — Impact test apparatus ......................................................................................... 18

31 Figure 3 — Bending test apparatus ....................................................................................... 19

32 Figure 4 — Steel enclosure for test for resistance to flame propagation ................................ 20

33 Figure 5 — Test arrangement for resistance to flame propagation ........................................ 21

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36 European foreword

37 This document (prEN 50626-1:2017) has been prepared by CLC/TC 213, "Cable management

38 systems".
39 This document is currently submitted to the Enquiry.
40 The following dates are proposed:
• latest date by which the existence of (doa) dor + 6 months
this document has to be announced
at national level
• latest date by which this document has to be (dop) dor + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dor + 36 months
conflicting with this document have to (to be confirmed or
be withdrawn modified when voting)

41 This document has been prepared under a mandate given to CENELEC by the European Commission

42 and the European Free Trade Association, and supports essential requirements of EU Directive(s).

43 For the relationship with EU Directive(s) see informative Annex ZZ, which is an integral part of this

44 document.

45 A conduit systems buried underground that conforms to this European Standard is deemed to be safe

46 for use.

47 This is a European Standard for cable management products used for electro-technical purposes. It

48 relates to the Council Directives on the approximation of laws, regulations and administrative

49 provisions of the Member States relating to Low Voltage Directive 2014/35/EU through consideration

50 of the essential requirements of this directive.

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

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52 1 Scope

53 This European Standard specifies general requirements and tests for conduit systems buried

54 underground for the protection and management of insulated conductors and/or power cables or

55 communication cables.
56 This European Standard is applicable to conduits with circular cross section.
57 The requirements described in this standard are applicable to all conduits
58 — installed individually or installed as a part of an assembly;
59 — where the cable is installed by pulling or pushing.

60 prEN 50626-2 specifies particular requirements and tests that are required for special applications.

61 NOTE Examples of special applications include special pipe installation techniques, and alternative cable

62 installation techniques are trenchless installation.
63 2 Normative references

64 The following documents, in whole or in part, are normatively referenced in this document and are

65 indispensable for its application. For dated references, only the edition cited applies. For undated

66 references, the latest edition of the referenced document (including any amendments) applies.

67 EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

68 EN 60695-2-11:2014, Fire hazard testing - Part 2-11: Glowing/hot-wire based test methods - Glow-

69 wire flammability test method for end-products (IEC 60695-2-11:2014)

70 EN 60695-11-2:2014, Fire hazard testing - Part 11-2: Test flames - 1 kW nominal pre-mixed flame -

71 Apparatus, confirmatory test arrangement and guidance (IEC 60695-11-2:2013)

72 ISO 2768-1:1989, General tolerances - Part 1: Tolerances for linear and angular dimensions without

73 individual tolerance indications
74 3 Terms and definitions
75 For the purposes of this document, the following terms and definitions apply.
76 3.1
77 conduit system

78 cable management system consisting of conduits and conduit fittings for the protection and

79 management of insulated conductors and/or cables in electrical or communication installations,

80 allowing them to be drawn in and/or replaced, but not to be inserted laterally

81 3.2
82 conduit

83 part of conduit system of circular cross-section for insulated conductors and/or cables in electrical or

84 communication installations, allowing them to be drawn in and/or replaced
85 3.3
86 conduit fitting

87 device designed to join components of a conduit system, or for them to change direction

88 3.4
89 terminating conduit fitting
90 conduit fitting that terminates a conduit system
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91 3.5
92 metallic conduit and/or conduit fitting
93 conduit or conduit fitting which consists of metal only
94 3.6
95 non-metallic conduit and/or conduit fitting

96 conduit or conduit fitting which consists uniquely of non-metallic material and which has no metallic

97 components whatsoever
98 3.7
99 composite conduit and/or conduit fitting

100 conduit or conduit fitting comprising both metallic and non-metallic materials

101 3.8
102 non-flame propagating conduit and/or conduit fitting

103 conduit or conduit fitting which is liable to catch fire as a result of an applied flame, but in which the

104 flame does not propagate, and which extinguishes itself within a limited time after the flame is

105 removed
106 3.9
107 plain conduit

108 conduit in which the profile is even in the longitudinal section (see note to 3.10)

109 3.10
110 corrugated conduit
111 conduit in which the profile is corrugated in the longitudinal section

112 Note 1 to entry: Both annular and helical corrugated conduits are permissible, and a combination of both

113 corrugated and plain conduit is possible.
114 3.11
115 rigid conduit

116 conduit which cannot be bent, or which can only be bent with the help of a mechanical aid, with or

117 without special treatment
118 3.12
119 pliable conduit

120 conduit which can be bent by hand with reasonable force, and which is not intended for frequent

121 flexing
122 3.13
123 external influence
124 factors which may affect the conduit system

125 Note 1 to entry: Examples of such factors are a presence of water, oil or building materials, low and high

126 temperatures, and corrosive or polluting substances.
127 3.14
128 hygroscopic material

129 material having the characteristic of enabling attraction or holding water greater than 1,0 % by weight

130 of the material from the surrounding environment at 23 °C and 50 % relative humidity

131 4 General requirements

132 4.1 Conduit and conduit fittings shall be so designed and constructed that in normal use their

133 performance is reliable and they provide protection to the user or surroundings.

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134 When assembled in accordance with manufacturer's instructions as part of a conduit system, conduits

135 and conduit fittings shall provide mechanical and, where required, electrical protection of the insulated

136 conductors and cables contained therein.

137 4.2 The protective properties of the joint between the conduit and conduit fitting shall not be less

138 than that declared for the conduit system.

139 4.3 Conduit and conduit fittings shall withstand the stresses likely to occur during transport, storage,

140 recommended installation practice and application.
141 4.4 Compliance is checked by carrying out all specified tests.
142 5 General conditions for tests

143 Tests in accordance with this standard are type tests. Conduit systems, having the same classification,

144 which can vary in colour only, shall be the same product type.

145 Where the conduit entries are part of the detachable or loose type conduit fitting, the detachable

146 conduit fitting shall be capable of being assembled again, after the test, according to the

147 manufacturer's instructions without loss of the declared properties according to Clause 6.

148 When toxic or hazardous processes are used, precautions shall be taken to safeguard the test

149 personnel.
150 Unless otherwise specified in this standard,

151 — three samples are subjected to the tests, and the requirements are satisfied if the tests are met. If

152 only one of the samples does not satisfy a test, due to an assembly or a manufacturing defect,

153 that test and any preceding one which may have influenced the result of the test shall be

154 repeated, and also the tests which follow shall be carried out in the required sequence on another

155 full set of samples, all of which shall comply with the requirements;

156 NOTE 1 If the additional set of samples is not submitted at the same time, a failure of one sample will

157 entail a rejection. The applicant, when submitting the first set of samples, can also submit an additional set of

158 samples which can be used, should one sample fail. The testing station will then, without further request, test

159 the additional set of samples and will reject them only if a further failure occurs.

160 — the tests shall be carried out within 1 min after conditioning and at an ambient temperature of

161 (20 ± 5) °C;

162 — each test shall be made on three new samples, which may be taken from one length;

163 NOTE 2 Certain tests, for instance the checking of dimensions, do not affect a change in the property of

164 the samples; therefore, these samples are considered as new samples and can be used for further tests.

165 — samples of conduits and conduit fittings shall be conditioned for at least 24 h, at a temperature of

166 (23 ± 2) °C. Samples of conduits and conduit fittings made of material with hygroscopic behaviour

167 shall be conditioned for at least 240 h, at a temperature of (23 ± 2) °C and a relative humidity

168 between 40 % and 60 %;

169 — the samples for each test shall be in a clean and new condition, with all parts in place and

170 mounted as in normal use. After checking dimensions in accordance with Clause 8, and unless

171 otherwise specified in the relevant test, the conduit fittings shall be assembled with the lengths of

172 conduit of the type for which they are intended, as defined in the relevant test. Due regard shall

173 be taken of the manufacturer's instructions, especially where force is required in the assembly of

174 the joint.

175 NOTE 3 Where similarities are claimed, the selection of representative fittings for test purposes can be

176 agreed between the manufacturer, or responsible vendor, and the testing station.

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177 6 Classification
178 6.1 According to mechanical properties
179 6.1.1 Resistance to compression
180 6.1.1.1 Type 250 (code 250)

181 NOTE A conduit system according to 6.1.1.1 is intended to be installed with additional precautions as specified

182 in the relevant national regulations.
183 6.1.1.2 Type 450 (code 450)

184 NOTE A conduit system according to 6.1.1.2 is intended to be directly buried underground without additional

185 precautions.
186 6.1.1.3 Type 750 (code 750)

187 NOTE A conduit system according to 6.1.1.3 is intended to be directly buried underground without additional

188 precautions.
189 6.1.2 Resistance to impact
190 6.1.2.1 Light (code L)
191 6.1.2.2 Normal (code N)
192 6.1.3 Resistance to bending
193 6.1.3.1 Rigid
194 6.1.3.2 Pliable
195 6.2 According to resistance to external influences
196 6.2.1 Protection against ingress of solid objects:
197 minimum of IP3X
198 6.2.2 Protection against ingress of water:
199 minimum of IPX0

200 6.2.3 Resistance against corrosion (only applicable to metallic and composite system

201 components)
202 6.2.3.1 Without protection
203 6.2.3.2 With protection as detailed in Table 4
204 6.3 According to resistance to flame propagation
205 6.3.1 Non-flame propagating
206 6.3.2 Flame propagating

207 NOTE Conduit systems to this part 1 are normally flame propagating. Non-flame propagating conduit

208 systems might be required for some applications.
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209 7 Marking and documentation
210 7.1 Each conduit shall be marked with:

211 — the manufacturer's or responsible vendor's name or trade mark or identification mark;

212 — a product identification mark, which may be, for example, the code of this standard, a catalogue

213 number, a symbol or the like, in such a way that it can be identified in the manufacturer’s or

214 responsible vendor’s literature;
215 — the code "L" or "N" according to 6.1.2;

216 — the code "250", "450" or "750" according to 6.1.1. This code shall be marked immediately after

217 the code” L” or “N”.

218 7.1.2 The manufacturer shall be responsible for indicating the compatibility of parts within a conduit

219 system.

220 7.1.3 The manufacturer shall provide in his literature its classification in accordance with Clause 6

221 and all information necessary for the proper and safe transport, storage, installation and use.

222 7.2 The conduit fitting shall be marked in accordance with 7.1, on the product wherever possible, but,

223 where this is impractical, then the mark may be on a label attached to the product, or on the smallest

224 supplied package.

225 7.3 Conduits shall be marked according to 7.1 at regular intervals along their length of preferably 1 m

226 but not longer than 3 m.

227 7.4 Compliance with 7.1 and 7.2 is checked by inspection. Compliance with 7.3 is checked by

228 inspection and measurement.
229 7.5 The marking shall be durable and clearly legible.

230 Compliance is checked by inspection, using normal or corrected vision, without additional

231 magnification and by rubbing the marking for 15 s with a piece of cotton cloth soaked with water and

232 again for 15 s with a piece of cotton cloth soaked with n-hexane 95 % (Chemical Abstracts Service

233 Registry Number, CAS RN, 110-54-3).

234 NOTE n-hexane 95 % (Chemical Abstracts Service Registry Number, CAS RN, 110-54-3) is available from a

235 variety of chemical suppliers as a high pressure liquid chromatography (HPLC) solvent.

236 When using the liquid specified for the test, precautions as stated in the relative material safety

237 datasheet provided by the chemical supplier shall be taken to safeguard the laboratory technicians.

238 Laser marking directly on the product and marking made by moulding, pressing or engraving are not

239 subjected to this test.

240 Products complying with a previous edition of the standard need not be tested again as this

241 requirement does not have impact on the safety of the product.

242 The marking surface to be tested shall be dried before rubbing the marking with n-hexane 95 %

243 solvent.

244 Rubbing shall commence immediately after soaking the piece of cotton, applying a compression force

245 of (5 ± 1) N at a rate of about one cycle per second (a cycle comprising a forward and backward

246 movement along the length of the marking). For markings longer than 20 mm, rubbing can be limited

247 to a part of the marking, over a path of at least 20 mm length.

248 The compression force is applied by means of a test piston which is wrapped with cotton comprising of

249 cotton wool covered by a piece of cotton medical gauze.
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250 The test piston shall have the dimensions given in Figure 1 and shall be made of an elastic material

251 which is inert against the test liquids and has a Shore-A hardness of 47 ± 5 (for example synthetic

252 rubber).

253 When it is not possible to carry out the test on the specimens due to the shape/size of the product, a

254 suitable piece having the same characteristics as the product can be submitted to the test.

255 After the test, the marking shall be legible.

256 7.6 The manufacturer shall provide in his literature all information necessary for the proper and safe

257 installation and use.

258 In addition, for conduit systems according to 6.1.1.1, the manufacturer shall give instruction for

259 installation precautions following the relevant national technical rules, if any.

260 7.7 In assemblies of identical conduits manufactured in the same extrusion process, at least one

261 conduit shall be marked with the above information.

262 NOTE Wrapping for transportation and installation is not considered as a protective conduit.

263 In assemblies of non-identical conduits manufactured both in the same process or in a different

264 process, each individual conduit shall be marked with the above information. As an alternative, in

265 assemblies comprising conduits of small size inside another conduit, all the required could be marked

266 on the external conduit.
267 8 Dimensions
268 Conduit dimensions should preferably be according to Table 1.
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269 Table 1 — Conduits diameters
Nominal size Nominal outside Tolerances Min. inside
mm diameter mm diameter
mm mm
25 25 + 0,5 18
32 32 + 0,6 24
40 40 + 0,8 30
50 50 + 1,0 37
63 63 + 1,2 47
75 75 + 1,4 56
90 90 + 1,7 67
110 110 + 2,0 82
125 125 + 2,3 94
140 140 + 2,6 106
160 160 + 2,9 120
180 180 + 3,3 135
200 200 + 3,6 150
225 225 +4,1 170
250 250 + 4,5 188
NOTE The nominal outside diameters are taken from ISO 161-1.
Tolerances on outside diameters (OD) are given as follows :
OD min: nominal outside diameter;

OD max: nominal outside diameter + (0,018 x nominal outside diameter values) rounded up to

0,1 mm.
Minimum inside diameter: nominal outside diameter divided by 1,33.

270 Compliance of the minimum inside diameter is checked by measurement according to two

271 perpendicular diameters on the same section and calculating the average value.

272 Compliance of the outside diameter is checked using a ring gauge or any suitable method.

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273 9 Construction

274 9.1 Within the conduit system, there shall be no sharp edges, burrs or surface projections which are

275 likely to damage insulated conductors or cables, or inflict injury on the installer or user.

276 Compliance is checked by inspection, if necessary after cutting the samples apart.

277 9.2 Screws, if any, used for attaching components or covers to conduit fittings, or in joints to

278 conduits, shall not cause damage to cable insulation when correctly inserted. They shall have ISO

279 metric threads. Thread-cutting screws shall not be used.

280 9.3 Fixing screws and small clips for use with non-metallic or composite conduit fittings need not be

281 of non-metallic material if they are isolated from insulated conductors or cables.

282 9.4 Screw fixing means shall be so designed to withstand the mechanical stresses occurring during

283 installation and normal use.

284 9.5 Any material, for example rubber, fibre, etc., within the joint, which may be exposed to external

285 influences when assembled according to the manufacturer's instructions, shall have at least the same

286 level of resistance to the external influence as either the conduit or the conduit fitting.

287 Compliance is checked by means of tests specified in Clause 12.

288 9.6 For conduit systems that are assembled by means other than threads, the manufacturer shall

289 indicate whether the system can be disassembled and if so, how this can be achieved.

290 Compliance is checked by inspection and by manual test.
291 10 Mechanical properties
292 10.1 Mechanical strength
293 10.1.1 Conduit systems shall have adequate mechanical strength.

294 10.1.2 Conduits, according to their classification, when bent or compressed, or exposed to impact or

295 extreme temperature of a specified value in accordance with impact and temperature classification

296 declared for the product, shall not crack and shall not be deformed to such an extent that

297 — introduction of the insulated conductors or cables becomes difficult, or

298 — the installed insulated conductors or cables are likely to be damaged while being drawn in.

299 These requirements are both applicable during and after installation according to the manufacturer's

300 instructions.
301 10.1.3 Compliance is checked by the tests of 10.2 to 10.4
302 10.2 Compression test
303 10.2.1 Conduits are subjected to a compression test.
304 NOTE Compression test on fittings is under consideration.
305 10.2.2 Samples are (200 ± 5) mm long.

306 10.2.3 Before the test, the outside and inside diameters of the samples are measured as specified in

307 Clause 8.
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308 10.2.4 The samples are compressed between two flat steel plates having minimum dimensions

309 (100 x 220 x 15) mm, the length 220 mm being along the length of the sample. The samples are

310 compressed at a rate of (15 ± 0,5) mm/min and the load recorded at the vertical deflection equivalent

311 to 5% of the average value of the original inside diameter of the sample.

312 10.2.5 When reaching the deflection of 5 %, the applied force shall be at least:

313 — 250 N for conduits according to 6.1.1.1;
314 — 450 N for conduits according to 6.1.1.2;
315 — 750 N for conduits according to 6.1.1.3.

316 NOTE The deflection is calculated with the inner diameter but the measurement of the outside diameter may

317 be sufficient. In case of dispute, it will be necessary to measure the inner diameter.

318 10.2.6 After the test, there shall be no crack allowing the ingress of light or water between the inside

319 and the outside.
320 10.3 Impact test

321 10.3.1 Twelve samples of conduits each (200 ± 5) mm in length or conduit fittings are subjected to

322 an impact test by means of the apparatus shown in Figure 2.
323 Conduits are tested alone.
324 Fittings are tested when assembled with conduits.

325 NOTE 1 If necessary for the test purposes, conduit fittings can be trimmed as long as the test result is not

326 affected.

327 NOTE 2 For determination of mass of hammer, the hammer is to be considered as the head of hammer plus

328 the guidance carriage.
329 10.3.2 The test apparatus is placed on a firm flat surface.

330 The samples are conditioned in a cold chamber at the temperature of (–5 ± 1)°C for 2 h.

331 The samples are removed from the cold chamber
...