Specification for Conduit systems for electrical installations Part 2 Particular requirements Section 2 4 Conduit systems buried underground The European Standard EN 50086 24 1994 has the status of a[.]
BS EN 50086-2-4:1994 Specification for Conduit systems for electrical installations Part 2: Particular requirements - Section 2.4: Conduit systems buried underground The European Standard EN 50086-24: 1994 has the status of a British Standard This British Standard should be read in conjunction with BS EN 50086-111994 UDC 621.315.2:696.6 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW `,`,-`-`,,`,,`,`,,` - Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale BS EN 50086-2-4:1994 Cooper at ing organization s The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the national committees of the following countries: Austria Belgium Denmark Finland France Germany Greece Iceland Ireland Amd.No Italy Luxembourg Netherlands Norway Portugal Spain Sweden Switzerland United Kingdom Date Comments O BSI 06-1999 The following BSI references relate to the work on this standard: Committee reference PEL/80 Draft for comment 92/32675 DC ISBN O 580 23412 `,`,-`-`,,`,,`,`,,` - Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale BS EN 50086-2-4:1994 Contents Cooperating organizations National foreword Foreword Text of EN 50086-2-4 National annex NA (informative) Committees responsible Page Inside front cover 11 `,`,-`-`,,`,,`,`,,` - O BSI 06-1999 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS i Not for Resale BS EN 50086-2-4:1994 National foreword This British Standard has been prepared under the direction ofthe Power Electrical Engineering Standards Policy Committee and is the English language version of EN 50086-2-4:1994 Cmduit systemsfor electrical installations Part 2-4: Particular requirementsfor conduit systems buried underground, published by the European Committee for Electrotechnical Standardization (CENELEC) The foreword ofEN 50086-24 makes reference to the ?date ofwithdrawal?(dow) of the relevant national standard In this case the relevant national standard is DD 200: 1991 which will be withdrawn on 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 October 1999 This British Standard is to be read in conjunction with BS EN 50086-1:1994 Specijicationfor conduit systemsfor electrical installations -Part I : General requirements The references to Part should be read as references to BS EN 50086-1:1994which is the English language version ofEN 50086-1:1993 A British Standard does not purport to include all the necessary provisions of a contract Users of British Standards are responsible for their correct application Compliance with a British S t a n d a r d does n o t 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 to and a back cover The BSI copyright notice displayed in this document indicates when the document was last issued 11British Standards Institution Copyright Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS `,`,-`-`,,`,,`,`,,` - O BSI 06- 1999 Not for Resale EUROPEAN STANDARD EN 50086-2-4 NORME EUROPÉENNE March 1994 EUROPÄISCHE NORM UDC 621.315.2:696.6 Descriptors: Electric wiring system, conduit buried underground, mechanical characteristics, electrical characteristics, test English version Conduit systems for electrical installations Part 2-4: Particular requirements for conduit systems buried underground Systèmes de conduits pour installations électriques Partie 2-4: Règles particulières pour les systèmes de conduits enterrés dans le sol Elekt r oinst allati on sr Ohr sys teme für elektrische installationen Teil : Besondere Anforderungen für erdverlegte Elektroinstallations-rohrsysteme `,`,-`-`,,`,,`,`,,` - This European Standard was approved by CENELEC on 1993-09-22 CENELEC members are bound to comply with the CENKENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status o f a national standard without any alteration Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member This European Standard exists in three official versions (English, French, German) A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, 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 C e n t r a l Secretariat: r u e de Stassart 35, B-1050 Brussels O 1994 Copyright reserved to CENELEC members Ref No EN 50086-2-4: 1994 E Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale EN 50086-2-4:1994 `,`,-`-`,,`,,`,`,,` - Foreword Contents This European Standard has been prepared by CENELEC Technical Committee TC 113, Cable Management Systems This Part specifies particular requirements for conduit systems buried underground 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 50086-24 on 1993-09-22 The following dates were fixed latest date ofpublication of an identical national st an dard - latest date ofwithdrawal of conflicting national st an dards - (dûp) 1994-10-01 (dûw) 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 supplements or modifies the corresponding clauses ofEN 50086-1: 1993, Conduit systemsf i electrical installations-Part I : General requirements Foreword Scope Normative references Definitions General requirements General conditions for test Classification Marking and documentation Dimensions 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 Page 3 3 3 4 4 5 6 6 Where a particular clause or subclause of Part is not mentioned in this Part 2-4, that clause or subclause applies as far as is reasonable Where this Part states “addition”, “modification” or “replacement”, the relevant text of Part is to be adapted accordingly Subclauses and figures which are in addition to those in Part are numbered starting with 101 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS OBSI 06-1999 Not for Resale EN 50086-2411994 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 andor cables in electrical installations or in commuiiication 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 ofother equipment shall also be tested according to the relevant specification for that equipment Normative references This clause of part is applicable except as follows: EN 60423 (in process), Not applicable IEC 670, Not applicable Addition: I S 161- 1:1978, 7hermoplasticpipesfor the transport of’uids nominal pressures -Part I : Metric series Nominal outside diameters and - Definitions This clause of part is applicable except as follows: Addition: 3.101 multiwall conduit a conduit consisting of several walls which may be a combination of plain andor corrugated walls General requirements This clause of part is applicable General conditions for tests This clause of part is applicable Classification This clause of part is applicable except as follows: 6.1 According to mechanicalproperties Replacement: 6.1.1 Resistance to impact: Normal duty Light duty 6.1.2 Resistance to bending: 6.2, 6.3 Rigid Pliable are not applicable Addition: 6.4.1O Resistance against chemical attack: Without protection With protection `,`,-`-`,,`,,`,`,,` - O BSI 06-1999 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale EN 50086-2-4:1994 6.5.3 is not applicable Marking and documentation This clause of part is applicable except as follows: 7.1 Addition: c) the type of conduit N mormal duty) or L (Light duty) Addition: 7.1.101 Conduits shall be marked in accordance with 7.1 at regular intervals along their length of preferably m but not longer than m 7.1.102 The manufacturer shall provide in his literature all information necessary for the proper and safe installation and use 7.2 Replacement: Conduit fittings shall be marked in accordance with 7.1 on the product 7.3, 7.4 are not applicable 7.5 Addition: An alternative test is under consideration Dimensions Replace the text of this clause by: Conduits should be preferably according to Table 101 Compliance of the minimum inside diameter shall be checked by measurement according to two pevendicular 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 Construction This clause of part is applicable except as follows: 9.3 and 9.4 are not applicable 10 Mechanical properties This clause of part 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 t e s t 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 f 5) mm long 10.2.4 The samples shall be compressed between two flat steel plates having minimum dimensions (100 X 200 X 15) mm, the length 200 mm being along the length of the sample The samples shall be compressed at a rate of(15 f 0,5) mm/min and the load recorded at the vertical deflection equivalent to YO of the average value of the original inside diameter of the sample Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS OBSI 06-1999 Not for Resale `,`,-`-`,,`,,`,`,,` - 10.2.3 Before the test, the outside and inside diameters of the samples shall be measured as described in clause EN 50086-2411994 10.2.5 When reaching the deflection Of "/o, the applied force shall be at least 450 N NOTE The deflection is calculated with the inner diameter but the measurement of the outside diameter may be sufficient In case ofdoubt, it will be necessary to measure the inner diameter 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 ofconduits each (200 f ) mm in length or conduit fittings are subjected to an impact test by means ofthe apparatus shown in Figure 101 Conduits are tested alone Fittings are tested when assembled with conduits by using a suitably shaped 120"vee-block 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 (- * 1) OC for h The samples shall be removed from the cold chamber and placed on the vee-block holder as shown in Figure 101 The striker shall fall once on each sample The time between removal ofthe 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 mm of any sample entry Samples of conduit are tested on the centre of their length 10.3.3 After the test, at least in nine ofthe samples, there shall be no crack allowing the ingress oflight or water between the inside and the outside 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 f 1) OC For the test at -5 OC, the samples shall be conditioned in a cold chamber for 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 approximately 90" and hold 10.4.3 During the test, the samples shall not flatten Compliance shall be checked bypassing a ball having a diameter equal to (95 +I / ) %ofthe minimum inner diameter of the sample declared by the manufacturer, through the sample whilst it is bent around the tmt apparatus 10.5, 10.6, 10.7 and 10.8 are not applicable 11 Electrical properties This clause of part is not applicable 12 Thermal properties This clause of part is applicable except as follows 12.2 is not applicable 13 Fire effects This clause of part is not applicable `,`,-`-`,,`,,`,`,,` - Copyright British Standards Institution O BSI 06-1999 Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale EN 50086-2-4:1994 14 External influences This clause of part is applicable except as follows: Addition: 14.1O Resistance to chemical attack Under consideration 15 Electromagnetic compatibility This clause of part is applicable Table 101 - Outside diameters - Preferred values Outside diameter Nominal size mm mm 25 32 40 50 63 75 90 110 125 140 160 180 lo0 125 150 VOTE Toler ance Mïn inside diameter mm 25 32 40 50 63 75 90 110 125 140 160 180 200 225 250 +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 mm 18 24 30 37 47 56 67 82 94 06 20 35 50 70 88 The nominal outsic diameters are taken from IS0 161- -Tolerances on Outside Diameters are given as follows: OD is nominal outside diameter, OD max is nominal outside diameter +(0,018 X nominal outside diameter values) rounded off to+0,1 mm -Minimum inside diameter is nominal outside diameter divided by 1,33 Table 102-Impact `,`,-`-`,,`,,`,`,,` - I Light d u t y Nominal size of Mass of striker conduit kg (+l/O) % Fall height mm (+i/-O) % L60 61 to90 91 to 140 >140 3 3 1O0 200 400 500 test energy values I Energy J 12 15 Normal duty Mass of striker kg (+1/0) % 5 5 Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Fall height mm (+&O) % 300 400 570 800 Energy J 15 20 28 40 OBSI 06-1999 Not for Resale EN 50086-2411994 '.O- S.B Graduuted scale, vertically adjustable for different sizes of conduit Frame Striker guidance/ weight carriage Striker \ - Striker El- r 20 m *TOTE This drawing is not intended to govern design except as regards the dimensions shown Figure 101-Impact Copyright British Standards Institution O BSI 06-1999 Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS test a p p a r a t u s `,`,-`-`,,`,,`,`,,` - Rigid base _f _ Not for Resale EN 50086-2-4:1994 `,`,-`-`,,`,,`,`,,` - suppon \Guide for conduit JOTE This drawing is not intended to govern design except as regards the dimensions shown Figure 102 -Bending test a p p a r a t u s Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS OBSI 06-1999 Not for Resale BS EN 50086-2-4:1994 National annex NA (informative) Committees responsible The United Kingdom 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 (BEAIMA Ltd.) British Telecommunications plc Electrical Installation Equipment Manufacturers’ Association Institution of Electrical Engineers Institution of Incorporated Executive Engineers `,`,-`-`,,`,,`,`,,` - Copyright British Standards Institution O BSI 06-1999 Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS Not for Resale BS EN 50086-2-4: 1994 BSI is the independent national body responsible for preparing British Standards It presents the UK view on standards in Europe and at the international level It is incorporated by Royal Charter Revi sions British Standards are updated by amendment or revision Users of British Standards should make sure that they possess the latest amendments or editions It is the constant aim of BSI to improve the quality of our products and services We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover Tel: +44 (0)20 8996 9000 Fax: +44 (0)20 8996 7400 BSI offers members an individual updating service called PLUS which ensures that subscribers automatically receive the latest editions of standards Buying standards `,`,-`-`,,`,,`,`,,` - Orders for all BSI, international and foreign standards publications should be addressed to Customer Services Tel: +44 (0)20 8996 9001 Fax: +44 (0)20 8996 7001 Email: orders@&-global.com Standards are also available from the BSI website at http://www.bsi-dobal.com In response to orders for international standards, it is BSI policy to supply the BSI implementation of those that have been published as British Standards, unless otherwise requested Information o n s t a n d a r d s BSI provides a wide range of information on national, European and international standards through its Library and its Technical Help to Exporters Service Various BSI electronic information services are also available which give details on all its products and services Contact the Information Centre Tel: +44 (0)20 8996 71 11 Fax: +44 (0)20 8996 7048 Email: infomi-global.com Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase price of standards For details ofthese and other benefits contact Membership Administration Tel: +44 (0)20 8996 7002 Fax: +44 (0)20 8996 700 Email: membership@bsi-global.com Information regarding online access to British Standards via British Standards Online can be found at http://www.bsi-dobal.com/bsonline Further information about BSI is available on the BSI website at http://www.bsi-global.com Copyright Copyright subsists in all BSI publications BSI also holds the copyright, in the UK, ofthe publications of the international standardization bodies Except as permitted under the Copyright, Designs and Patents Act 1988 no extract may be reproduced, stored in a retrieval system or transmitted in any form or by any means - electronic, photocopying, recording or otherwise -without prior written permission from BSI BSI 389 Chiswick High Road Lon don w 4AL Copyright British Standards Institution Provided by IHS under license with BSI No reproduction or networking permitted without license from IHS This does not preclude the free use, in the course of implementing the standard, ofnecessary details such as symbols, and size, type or grade designations Ifthese details are to be used for any other purpose than implementation then the prior written permission ofBSI must be obtained Details and advice can be obtained from the Copyright & Licensing Manager Tel: +44 (0)20 8996 7070 Fax: +44 (0)20 8996 7553 Email: copyright@&-global.com Not for Resale