1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationCover plates and cover tapes for the protection and locationwarning of buried cables orburied conduits in undergroundinstallationsBS EN 50520:2009National forewordThis British St
2、andard is the UK implementation of EN 50520:2009.The UK participation in its preparation was entrusted to Technical CommitteePEL/213, Cable management.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the
3、 necessary provisions of acontract. Users are responsible for its correct application. BSI 2010ISBN 978 0 580 62074 4ICS 29.120.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of the StandardsPolicy and Strateg
4、y Committee on 31 January 2010Amendments issued since publicationAmd. No. Date Text affectedBRITISH STANDARDBS EN 50520:2009EUROPEAN STANDARD EN 50520 NORME EUROPENNE EUROPISCHE NORM July 2009 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechn
5、ique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: Avenue Marnix 17, B - 1000 Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 50520:2009 E ICS 29.120.10 English version Cover plates and cover
6、tapes for the protection and location warning of buried cables or buried conduits in underground installations Plaques et bandes de protection pour la protection et le signalement des cbles enterrs ou des conduits enterrs dans les installations sous terre Abdeckplatten und bnder zum Schutz und zur W
7、arnkennzeichnung der Lage von Kabeln oder erdverlegten Elektroinstallationsrohren in Unterbodeninstallationen This European Standard was approved by CENELEC on 2009-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
8、opean 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 (En
9、glish, 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
10、, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS E
11、N 50520:2009EN 50520:2009 - 2 - Foreword This European Standard was prepared by the Technical Committee CENELEC TC 213, Cable management systems. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50520 on 2009-06-01. The following dates were fixed: latest date
12、by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2010-06-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2012-06-01 A cover plate or a cover tape which conforms to this E
13、uropean Standard is deemed to be safe for use. This is a European Standard for cable management products used for electro-technical purposes. It relates to the Council Directives on the approximation of laws, regulations and administrative provisions of the Member States relating to Low Voltage Dire
14、ctive 2006/95/EC through consideration of the essential requirements of this directive. This European Standard is supported by separate standards to which references are made. _ BS EN 50520:2009- 3 - EN 50520:2009 Contents 1 Scope 4 2 Normative references . 4 3 Definitions . 4 4 General requirements
15、 . 4 5 General conditions for tests 5 6 Classification according to the temperature . 5 7 Marking and documentation . 6 8 Dimensions . 7 9 Construction . 7 10 Mechanical properties 7 Annex A (informative) Test to be applied on the cover plates and cover tapes . 10 Annex B (informative) Example of th
16、e location of the marks 11 Annex C (informative) Examples of dimensions . 12 Annex D (informative) A-deviations 13 Bibliography . 14 Figures Figure 1 - Punch test apparatus 8 Figure B.1 - Example of marking for cover plates . 11 Figure C.1 - Explanation of the meaning of the dimensions of cover plat
17、es . 12 Tables Table 1 - Minimum transport, storage installation and application temperature 5 Table A.1 - Required tests . 10 Table C.1 - Examples of dimensions of cover plates 12 Table C.2 - Examples of dimensions of cover tapes . 12 BS EN 50520:2009EN 50520:2009 - 4 - 1 Scope This European Standa
18、rd establishes the requirements and tests for cover plates and cover tapes used for the mechanical protection, identification and warning of the location of buried cables or buried conduits in underground installations. NOTE This European Standard does not apply to meshes and tapes falling under EN
19、12613. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60417 (database
20、), Graphical symbols for use on equipment ISO 3864 (series), Graphical symbols - Safety colours and safety signs 3 Definitions For the purpose of this document the following definitions apply. 3.1 cover plates plates with a defined length and width that are linked one to another and are located abov
21、e the sand ballast that are intended to protect against mechanical damage the underground cables and/or conduit installations, and to identify in a prominent manner the location of the underground cables and/or conduit installations along their length and width 3.2 cover tapes tapes with a defined w
22、idth that are located above the sand ballast that are intended to protect against mechanical damage the underground cables and/or conduit installations, and to identify in a prominent manner the location of the underground cables and/or conduit installations along their length and width 4 General re
23、quirements Cover plates and cover tapes shall be so designed and constructed that, when installed according to manufacturers instructions, they provide mechanical protection and location warning of either a group of cables or conduits in all their extension (length and width). Compliance is checked
24、by carrying out all the tests specified. BS EN 50520:2009- 5 - EN 50520:2009 5 General conditions for tests 5.1 Test conditions Tests according to this standard are type tests. NOTE Annex A provides an overview of the tests to be applied on the cover plates and cover tapes. Unless otherwise specifie
25、d, the samples are tested as delivered and under normal conditions of use, according to the manufacturers instructions. Unless otherwise specified, the tests are carried out in the order of the clauses, at an ambient temperature between 15 C and 35 C. In case of doubt, the tests are made at an ambie
26、nt temperature of (20 5) C. 5.2 Samples Unless otherwise specified, each test is made on three new samples. NOTE Certain tests, for instance the checking of dimensions, do not affect a change in the property of the samples; therefore these samples are considered as new samples and can be used for fu
27、rther tests. 5.3 Validation of the results The samples are submitted to all the relevant tests and the requirements are satisfied if all the tests are met. If one sample does not satisfy a test due to an assembly or a manufacturing fault, that test and any preceding one which may have influenced the
28、 results of the test shall be repeated, and also the tests which follow shall be carried out in the required sequence on another full set of samples, all of which shall comply with the requirements. NOTE The applicant may submit, together with a number of samples specified in 5.2, the additional set
29、 of samples which may be required, should one sample fail. The testing station will then, without further request, test the additional samples and will only reject them if a further failure occurs. If the additional set of samples is not submitted at the same time, the failure of one sample will ent
30、ail rejection. 5.4 When toxic or hazardous processes are used, due regard shall be taken of the safety of the persons within the test area. 6 Classification according to the temperature The minimum temperature of transport, storage, installation and application is given in Table 1. Table 1 - Minimum
31、 transport, storage installation and application temperature Temperature C +5 -5 -15 -20 -25 -45 BS EN 50520:2009EN 50520:2009 - 6 - 7 Marking and documentation 7.1 Cover plates and cover tapes shall be marked with name, sign or trademark of the manufacturer or responsible vendor, a product identifi
32、cation mark which may be, for example, a catalogue number, a symbol or the like, the reference to this standard, the following notice: a warning, as for example ATTENTION or PRECAUTION; for cover plates and cover tapes intended for protecting and indicating the presence of electric cables or conduit
33、s for electric cables that are buried underground: the warning sign for dangerous voltage as specified in IEC 60417 (code 5036), inside an advertisement sign as specified in ISO 3864, and the message ELECTRIC CABLES; for cover plates and cover tapes intended for protecting and indicating the presenc
34、e of information and communication technology cables or conduits for information and communication technology cables that are buried underground: an advertisement sign as specified in ISO 3864, and the message CABLES. Cover plates and cover tapes can voluntarily be marked with: the anagram or name o
35、f either the supplier electric company or operator of the network; any information regarding the used raw material. NOTE In Annex B an example is given of the marks that are on a cover plate or cover tape. Compliance is checked by inspection and if necessary by measurement. 7.2 Marking shall be so d
36、esigned that: the text shall be placed in the above part of the cover plates; the text shall be in capital letters with a minimum of 15 mm height; in cover plates, it shall be possible to read all the marks in a single one; in cover tapes the text shall be marked at intervals not exceeding 1 m; the
37、text shall present a good contrast with the background colour. NOTE 1 It is recommended that the marks are to be placed approximately in a central position. NOTE 2 Examples of safety colours are given in ISO 3864. Compliance is checked by inspection and if necessary by measurement. 7.3 The marking s
38、hall be durable and clearly legible. Compliance is checked by the following test. The marking is rubbed by the appropriate method applying a continuous force of 2,5 N for 15 s with a piece of cotton or felt of 20 mm x 35 mm soaked with water and again for 15 s with a piece of cotton or felt of 20 mm
39、 x 35 mm soaked with petroleum spirit. NOTE Marking made by moulding, pressing or engraving is not subjected to this test. After the test, the marking shall be legible. BS EN 50520:2009- 7 - EN 50520:2009 8 Dimensions The dimensions, the profile form and the longitudinal union device shall be accord
40、ing to the manufacturers standard sheet. NOTE In Annex C some examples of common dimensions are given. Compliance is checked by inspection and measurement. 9 Construction The cut of the ends of the cover plates shall be perpendicular to its longitudinal axis, without sharp edges. The profile of the
41、cover plates or the cover tapes shall be uniform. It shall be free of irregularities and it shall not have either bubbles or other similar defects. The junction of cover plates shall be designed in such way that no distance is left between them in the longitudinal axis. Compliance is checked by insp
42、ection. 10 Mechanical properties 10.1 General Cover plates and cover tapes shall have an adequate mechanical strength. Compliance is checked by the test of 10.2 and 10.3. 10.2 Punch energy test The sample will consist on a piece of cover plate or cover tape, as applicable, with a minimum length of 5
43、00 mm. The test is carried out on the sample which shall be placed on a single base of expanded polystyrene, of a density of 15 kg/m3and of 1 000 mm length, 250 mm width and 100 mm thickness. The polystyrene shall be placed on a soft wooden protector basis. The hammer, as it is represented in Figure
44、 1, shall fall on the sample from a height of 500 mm 5 mm. The mass of the hammer shall be 10 kg 0,01 kg. Before the test, the samples shall remain for 1 h at the minimum temperature declared by the manufacturer specified in Table 1 with a tolerance of 2 C. Immediately after taking out the samples o
45、f the refrigerating enclosure, it shall be tested 5 times or at least 3 times if the dimensions are too small. The hammer is allowed to fall on each sample, along the longitudinal axis, at a minimum distance of 100 mm of the longitudinal edges of the sample and at a minimum distance of 100 mm of the
46、 point of previous impact. The impacts shall be carried out within 60 s after taking out the samples of the refrigerating enclosure. BS EN 50520:2009EN 50520:2009 - 8 - In case that after 60 s not all the impacts had been carried out, the sample shall be placed again in the refrigerating enclosure f
47、or at least 30 min; after this time, the rest of the impacts shall be carried out. In the case of a 3 falls test (3 samples and a total of 9 falls), the test is deemed to be passed if, in the group of samples, - the hammer penetrates at least two times a maximum distance of 100 mm measured from the
48、top of the sample, and - the samples do not break. In the case of a 5 falls test (3 samples and a total of 15 falls), the test is deemed to be passed if, in the group of samples, - the hammer penetrates at least three times a maximum distance of 100 mm measured from the top of the sample, and - the
49、samples do not break. Key 1 Adjust column with base plate 2 10 kg mass with punch hammer 3 Guide 4 Sample 5 Expanded polystyrene base 6 Protective wooden basis h Height of the fall Figure 1 - Punch test apparatus BS EN 50520:2009- 9 - EN 50520:2009 10.3 Resistance of the longitudinal junction to a tensile strength When testing cover plates, a piece with a minimum length of 200 mm is cut from each end of the cover plate. Coupling this way the two pieces obtained to form a longitudinal juncti
