Bsen 50086-2-4 Conduit System Buried Underground 6a4j3w

BS EN 50086-2-4:1994

BRITISH STANDARD

Incorporating Amendment No. 1

Specification for conduit systems for cable management — Part 2: Particular requirements — Section 2.4: Conduit systems buried underground

The European Standard EN 50086-2-4:1994, with the incorporation of amendment A1:2001, has the status of a British Standard This British Standard should be read in conjunction with BS EN 50086-1:1994

UDC 621.315.2:696.6

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BS EN 50086-2-4:1994

Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries:

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Austria Belgium Denmark Finland Greece Iceland Ireland

This British Standard, having been prepared under the direction of the Power Electrical Engineering Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1994 © BSI 13 March 2002 The following BSI references relate to the work on this standard: Committee reference PEL/80 Draft for comment 92/32675 DC

Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom

Amendments issued since publication Amd. No.

Date

Comments

13550

13 March 2002

See national foreword. Indicated by a sideline.

ISBN 0 580 23412 6

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BS EN 50086-2-4:1994

Contents Cooperating organizations National foreword Foreword Text of EN 50086-2-4 National annex NA (informative) Committees responsible

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BS EN 50086-2-4:1994

National foreword This British Standard has been prepared under the direction of the Power Electrical Engineering Standards Policy Committee and is the English language version of EN 50086-2-4:1994 Conduit systems for cable management — Part 2-4: Particular requirements for conduit systems buried underground, including amendment A1:2001 and corrigendum February 2001, published by the European Committee for Electrotechnical Standardization (CENELEC).

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The foreword of EN 50086-2-4 makes reference to the “date of withdrawal” (dow) of the relevant national standard. In this case the relevant national standard is DD 200:1991 which will be withdrawn on 1 October 1994. Certificates and Marks will not be awarded after this date with respect to the withdrawn British Standard. However, such Certificates and Marks, already awarded may continue to apply to production until 1 October 1999. This British Standard is to be read in conjunction with BS EN 50086-1:1994 Specification for conduit systems for cable management — Part 1: General requirements. The references to Part 1 should be read as references to BS EN 50086-1:1994 which is the English language version of EN 50086-1:1993. Amendment No. 1 to BS EN 50086-2-4:1994 incorporates amendment A1:2001 to EN 50086-2-4:1994 and corrigendum February 2001 to EN 50086-2-4:1994, which corrects the title of the standard. A British Standard does not purport to include all the necessary provisions of a contract. s of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 10, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Sidelining in this document indicates the most recent changes by amendment.

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EUROPEAN STANDARD

EN 50086-2-4

NORME EUROPÉENNE

March 1994

+ A1

EUROPÄISCHE NORM

February 2001

UDC 621.315.2:696.6

Incorporating corrigendum February 2001

Descriptors: Electric wiring system, conduit buried underground, mechanical characteristics, electrical characteristics, test

English version

Conduit systems for cable management — Part 2-4: Particular requirements for conduit systems buried underground (includes amendment A1:2001)

Systèmes de conduits pour la gestion du câblage — Partie 2-4: Règles particulières pour les systèmes de conduits enterrés dans le sol (inclut l’amendement A1:2001) --`,`,-`-`,,`,,`,`,,`---

Installationsrohrsysteme zum Führen von Leitungen für elektrische Energie und für Information — Teil 2-4: Besondere Anforderungen für erdverlegte Elektroinstallations-rohrsysteme (enthält Änderung A1:2001)

This European Standard was approved by CENELEC on 1993-09-22. Amendment A1:2001 was approved by CENELEC on 2000-08-01. CENELEC 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 are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, , , Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1994 Copyright reserved to CENELEC

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Ref. No. EN 50086-2-4:1994 + A1:2001 E

EN 50086-2-4:1994

Foreword

Foreword to amendment A1

This European Standard has been prepared by CENELEC Technical Committee TC 113, Cable Management Systems.

This amendment to the European Standard was prepared by the Technical Committee CENELEC TC 213, Cable management.

This Part 2-4 specifies particular requirements for conduit systems buried underground.

The text of the draft was submitted to the formal vote and was approved by CENELEC as amendment A1 to EN 50086-2-4:1994 on 2000-08-01.

A conduit system which conforms to this standard, is deemed safe for use. The text of this standard was submitted to the formal vote and was approved by CENELEC as EN 50086-2-4 on 1993-09-22. The following dates were fixed. — latest date of publication of an identical national standard — latest date of withdrawal of conflicting national standards

(dop) 1994-10-01 (dow) 1994-10-01

For products which have complied with the relevant national standard before 1994-10-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 1999-10-01. This Part 2-4 supplements or modifies the corresponding clauses of EN 50086-1:1993, Conduit systems for cable management — Part 1: General requirements. Where a particular clause or subclause of Part 1 is not mentioned in this Part 2-4, that clause or subclause applies as far as is reasonable. Where this Part 2-4 states “addition”, “modification” or “replacement”, the relevant text of Part 1 is to be adapted accordingly. Subclauses and figures which are in addition to those in Part 1 are numbered starting with 101.

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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) 2001-08-01 — latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2003-08-01

Contents Foreword 1 Scope 2 Normative references 3 Definitions 4 General requirements 5 General conditions for test 6 Classification 7 Marking and documentation 8 Dimensions 9 Construction 10 Mechanical properties 11 Electrical properties 12 Thermal properties 13 Fire effects 14 External influences 15 Electromagnetic compatibility Figure 101 — Impact test apparatus Figure 102 — Bending test apparatus Table 101 — Outside diameters — Preferred values Table 102 — Impact test energy values

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© BSI 13 March 2002

EN 50086-2-4:1994

1 Scope Replacement This standard specifies requirements and tests for conduit systems buried underground including conduits and conduit fittings for the protection and management of insulated conductors and/or cables in electrical installations or in communication systems. This standard applies to metallic, non-metallic and composite systems including threaded and non-threaded entries which terminate the system. Conduit systems which are used as an integral part of other equipment shall also be tested according to the relevant specification for that equipment.

2 Normative references This clause of Part 1 is applicable except as follows: EN 60423 (in process), Not applicable. IEC 670, Not applicable. Addition ISO 161-1:1978,

Thermoplastic pipes for the transport of fluids — Nominal outside diameters and nominal pressures — Part 1: Metric series

3 Definitions This clause of Part 1 is applicable except as follows. Addition 3.101 multiwall conduit a conduit consisting of several walls which may be a combination of plain and/or corrugated walls 3.102 conduit system type 250 a conduit system intended to be installed with additional precautions as defined in the relevant national regulations 3.103 conduit system type 450 and 750 a conduit system intended to be directly buried underground without additional precautions

4 General requirements This clause of Part 1 is applicable.

5 General conditions for tests This clause of Part 1 is applicable.

6 Classification This clause of Part 1 is applicable except as follows. NOTE

Annex A is not applicable.

6.1 According to mechanical properties Replacement 6.1.1 Resistance to compression 6.1.1.1 Type 250. 6.1.1.2 Type 450. 6.1.1.3 Type 750.

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EN 50086-2-4:1994

6.1.2 Resistance to impact 6.1.2.1 Light. 6.1.2.2 Normal. 6.1.3 Resistance to bending 6.1.3.1 Rigid. 6.1.3.2 Pliable. 6.2 According to temperature Not applicable. 6.3 According to electrical characteristics Under consideration. 6.4 According to resistance to external influences Addition 6.4.101 Resistance against chemical attack 6.4.101.1 Without protection. 6.4.101.2 With protection. Replacement 6.5.3 Other fire effects Not applicable.

7 Marking and documentation This clause of Part 1 is applicable except as follows. 7.1 Addition c) the classification code “250”, “450” or “750” according to 6.1.1; d) the classification code L or N according to 6.1.2. This code shall be marked before the code according to c). 7.1.1 Not applicable. 7.1.101 Conduits shall be marked in accordance with 7.1 at regular intervals along their length of preferably 1 m but not longer than 3 m. 7.3 and 7.4 are not applicable. 7.5 Addition NOTE

An alternative test is under consideration.

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7.101 The manufacturer shall provide in his literature all information necessary for the proper and safe installation and use. For type 250 according to 6.1.1.1 the manufacturer shall give instruction following the relevant national technical rules, if any.

8 Dimensions Replace the text of this clause with: Conduits should be preferably according to Table 101. Compliance of the minimum inside diameter shall be checked by measurement according to two perpendicular diameters on the same section and calculating the average value. Compliance of the outside diameter shall be checked using a ring gauge or any suitable method.

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9 Construction This clause of Part 1 is applicable except as follows. 9.3 and 9.4 are not applicable.

10 Mechanical properties This clause of Part 1 is applicable except as follows. 10.1.4 Replacement Compliance is checked by the tests of 10.2, 10.3 and 10.4. 10.2 Compression test Replacement 10.2.1 Conduits and bends are subjected to a compression test. The test for conduits and bends containing non-metallic materials shall not be started until 10 days after manufacture. 10.2.2 Samples shall be (200 ± 5) mm long. 10.2.3 Before the test, the outside and inside diameters of the samples shall be measured as described in clause 8. 10.2.4 The samples shall be compressed between two flat steel plates having minimum dimensions (100 × 220 × 15) mm, the length 220 mm being along the length of the sample. The samples shall be compressed at a rate of (15 ± 0,5) mm/min and the load recorded at the vertical deflection equivalent to 5 % of the average value of the original inside diameter of the sample. 10.2.5 When reaching the deflection of 5 %, the applied force shall be at least: — 250 N for conduits with classification declared according to 6.1.1.1; — 450 N for conduits with classification declared according to 6.1.1.2; — 750 N for conduits with classification declared according to 6.1.1.3. 10.2.6 After the test, there shall be no crack allowing the ingress of light or water between the inside and the outside. 10.3 Impact test Replacement 10.3.1 Twelve samples of conduits each (200 ± 5) mm in length or conduit fittings are subjected to an impact test by means of the apparatus shown in Figure 101. NOTE 1

If necessary, for the test purposes conduit fittings may be trimmed as long as the test results is not affected.

NOTE 2

For determination of mass of hammer, the hammer is to be considered as the head of hammer plus the guidance carriage.

Conduits are tested alone. Fittings are tested when assembled with conduits by using a suitably shaped 120º vee-block. NOTE 1

If necessary, for the test purposes conduit fittings may be trimmed as long as the test result is not affected.

NOTE2

For determination of mass of hammer, the hammer is to be considered as the head of hammer plust the guidance carriage.

10.3.2 The test apparatus shall be placed on a firm flat surface. The samples shall be conditioned in a cold chamber at the temperature of (–5 ± 1) ºC for 2 h.

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The samples shall be removed from the cold chamber and placed on the vee-block holder as shown in Figure 101. The hammer shall fall once on each sample. The time between removal of the sample from the cold chamber and completion of impact shall not exceed 10 s. The energy values are specified in Table 102. The test shall be made on the weakest part of the conduit fitting except that it shall not be applied within 5 mm of any sample entry. Samples of conduit are tested on the centre of their length.

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EN 50086-2-4:1994

10.3.3 After the test, when samples have attained (20 ± 5) °C, it shall be possible to the appropriate ball specified in 10.4.3 through the conduit, under its own weight and without any initial speed, with the sample in the vertical position. There shall be no sign of disintegration nor shall there be any crack allowing the ingress of light or water between the inside and the outside. At least nine of the twelve samples shall the test. 10.4 Bending test Replacement 10.4.1 This test shall be carried out on pliable conduits. 10.4.2 The test is made on six samples having an appropriate length. Three samples are tested at room temperature, the other three are tested at (-–5 ± 1) ºC. For the test at -–5 ºC, the samples shall be conditioned in a cold chamber for 2 hours. The test apparatus consists of a device as shown in Figure 102 allowing to bend the conduit with a bending radius equal to the minimum bending radius specified by the manufacturer. One of the ends of the samples shall be fixed on the test apparatus by means of an appropriate device. The sample is then bent to an angle of approximately 90°. For samples which are conditioned in the cold chamber, the bending shall be carried out within 10 s after the removal from the cold chamber. 10.4.3 During the test, the samples shall not flatten. Compliance shall be checked by ing a ball having a diameter equal to (95 + 1/–0) % of the minimum inner diameter of the sample declared by the manufacturer, through the sample whilst it is bent around the test apparatus. 10.5, 10.6, 10.7 and 10.8 are not applicable.

11 Electrical properties This clause of Part 1 is not applicable.

12 Thermal properties This clause of Part 1 is applicable except as follows. --`,`,-`-`,,`,,`,`,,`---

12.2 is not applicable.

13 Fire effects This clause of Part 1 is not applicable.

14 External influences This clause of Part 1 is applicable except as follows. Addition 14.101 Resistance to chemical attack Under consideration.

15 Electromagnetic compatibility This clause of Part 1 is applicable.

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Table 101 — Outside diameters — Preferred values Nominal size

Outside diameter

Tolerance

Min. inside diameter

mm

mm

mm

mm

NOTE

18 24 30 37 47 56 67 82 94 106 120 135 150 170 188

+0,5 +0,6 +0,8 +1,0 +1,2 +1,4 +1,7 +2,0 +2,3 +2,6 +2,9 +3,3 +3,6 +4,1 +4,5

25 32 40 50 63 75 90 110 125 140 160 180 200 225 250

25 32 40 50 63 75 90 110 125 140 160 180 200 225 250

The nominal outside diameters are taken from ISO 161-1.

— Tolerances on Outside Diameters are given as follows: • OD min is nominal outside diameter; • OD max is nominal outside diameter +(0,018 × nominal outside diameter values) rounded off to +0,1 mm. — Minimum inside diameter is nominal outside diameter divided by 1,33.

Table 102 — Impact test energy values Light Nominal size of Mass of hammer conduit kg (+1/0) %

k60 61 to 90 91 to 140 >140

3 3 3 3

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Normal Energy J

Fall height mm (+1/–0) %

100 200 400 500

3 6 12 15

Mass of hammer kg (+1/0) %

5 5 5 5

Energy J

Fall height mm (+1/–0) %

300 400 570 800

15 20 28 40

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Dimensions in millimetres

NOTE

This drawing is not intended to govern design except as regards the dimensions shown.

Figure 101 — Impact test apparatus

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Dimensions in millimetres

NOTE

This drawing is not intended to govern design except as regards the dimensions shown.

Figure 102 — Bending test apparatus

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EN 50086-2-4:1994

National annex NA (informative) Committees responsible The United Kingdom’s participation in the preparation of this European Standard was entrusted by the Power Electrical Engineering Standards Policy Committee (PEL/--) to Technical Committee PEL/80 upon which the following bodies were represented: ASTA Certification Services British Electrical Systems Association (BEAMA Ltd.) British Telecommunications plc Electrical Installation Equipment Manufacturers’ Association Institution of Electrical Engineers Institution of Incorporated Executive Engineers

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