BS EN 50117-4:1996:2006 Edition
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Coaxial cables used in cabled distribution networks – Sectional specification for distribution and trunk cables
| Published By | Publication Date | Number of Pages |
| BSI | 2006 | 12 |
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| 1 | BRITISH STANDARD BS EN 50117-4:1996 Coaxial cables used in cabled distribution networks – Part 4: Sectional specification for distribution and trunk cables The European Standard EN 50117-4:1996 has the status of a British Standard ICS 33.120.10 |
| 2 | Committees responsible for this British Standard The preparation of this British Standard was entrusted by Technical Committee EPL/46, Cables, wires and waveguides, RF connector… AEA Technology British Approvals Services for Cables British Broadcasting Corporation British Cable Makers Confederation British Railways Board British Telecommunications plc Cable Communication Association Confederation of Aerial Industries ERA Technology Federation of the Electronics Industry London Underground Ministry of Defence Society of Cable Television Engineers |
| 3 | Contents |
| 4 | National foreword This British Standard has been prepared by Subcommittee EPL/46/1 and is the English language version of EN 50117-4:1996, Coaxial… This Part should be read in conjunction with BS EN 50117-1:2002. Together with BS EN 50117-1:2002, BS EN 50117-2-1:2005, BS EN 50117-2-2:2004, BS EN 50117-2-3:2004 and BS EN 50117-3:1996, it supersedes BS 5425-1:1986 which is withdrawn. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BS… 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 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 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. |
| 5 | EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 50117-4 February 1996 English version Coaxial cables used in cabled distribution networks Part 4: Sectional specification for distribution and trunk cables Câbles coaxiaux pour réseaux câblés de distribution Partie 4: Spécification intermédiaire pour câbles de distribution et de transfert Koaxialkabel für Kabelverteilanlagen Teil 4: Rahmenspezifikation für Verteiler- und Linienkabel 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 © 1996 Copyright reserved to CENELEC members Ref. No. EN 50117-4:1996 E |
| 6 | This European Standard was prepared by Subcommittee SC 46XA, Coaxial cables, of the Technical Committee CENELEC SC 46X, Communication cables. The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50117-4 on 1995-07-04. The following dates were fixed: Annexes designated “informative” are given for information only. In this standard, annex A is informative. |
| 7 | 1 Scope This Sectional Specification is intended to be used in conjunction with the Generic Specification EN 50117-1, Coaxial cables for use in cabled distribution networks operating at frequencies between 5 MHz and 862 MHz. This Sectional Specification applies to distribution and trunk cables. The purpose of the standard is to specify values and preferential characteristics of the cables, and to identify the applicable tests from the Generic Specification. Reference is made to suitable schemes for Quality Assessment. The numbering of the clauses is the same as in the Generic Specification. All the clauses from the Generic Specification are app… 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative reference… EN 50117-1, Coaxial cables used in cabled distribution networks – Part 1: Generic specification. HD 624.4, Materials used in communication cables – Part 4: PE sheathing (under consideration). 3 Definitions Terminology, units of measure, and symbols, are the same as in the Generic Specification. 4 Materials and cable construction 4.3 Dielectric Unless otherwise specified, nominal cable diameter over the dielectric should preferably be selected from the following: 4.4 Outer conductor or screen All outer conductors shall be type b, c or d of subclause 4.4 of the Generic Specification. 4.5 Sheath The sheath of cables covered by this Sectional Specification shall be in polyethylene (PE). Sheaths shall be in black PE for aerial applications. For aerial figure-of-eight cables, the messenger shall be solid or stranded, made of galvanized or phosphated steel, or aluminium alloy wires. The messenger type shall be specified in the Detail Specifications. 6 Identification marking and labelling 6.2 Sheath marking Cables shall be marked on the outer sheath with i) Cable type ii) Supplier identification at least once per metre. Additional marking is permissible provided i) and ii) above are clearly identifiable. Sheath marking shall not be easily removable (preferably via the use of embossing or ink). 9 Materials and cable construction tests 9.4 Ovality Applicable. The application of this test to semi air spaced cables is under consideration. 9.5 Carbon black content Applicable to black PE sheaths only. 9.6 Tensile strength and elongation after break for metals Applicable only for copper and copper clad aluminium inner conductors. 9.7 Tensile strength and elongation at break for metals Not applicable. 9.8 Torsion test for copper clad metals Applicable only for copper clad aluminium inner conductors. |
| 8 | 9.9 Tensile strength and elongation for plastics Applicable on the outer sheath of the cable. Requirements Plastic materials used in the construction of these cables shall meet the requirements of HD 624 as follows; 9.10 Flammability Not applicable. 10 Mechanical and thermal characteristics 10.1 Adhesion to dielectric The test shall be performed to determine the value of the adhesion of the dielectric to the inner conductor. The application of this test on semi air spaced cables is under consideration. The adhesion of the dielectric to the inner conductor, Fa, shall be given in MPa by the following: Fa = F/(P* d*l) where Fa is in MPa Requirements The maximum value shall be in 1,0 MPa. The minimum value shall be 0,1 MPa. Where the diameter of the inner conductor is smaller than 3,3 mm for copper clad aluminium the test shall be performed on a 25 mm sample length (l). Otherwise it shall be performed on a 50 mm sample length. 10.2 Bending 10.2.2 Flexing Not applicable. 10.4 Crush resistance of cable Applicable with an applied load of F = 700 N. Testing will be done in accordance with 11.9.2 with a rise time of £ 1 ns. After a recovery time of no more than 5 min the maximum irregularity shall be less than 1 %. 10.5 Vibration test and aerial figure eight cables Applicable (under consideration in the Generic Specification). 10.6 Climatic tests 10.6.1 Climatic sequence Applicable. The cables shall comply with one of the two following classes: i) Class 40/70/4 (IEC 68) ii) Class 20/70/4 (IEC 68) 10.6.2 Damp heat Not applicable. 11 Electrical Characteristics – Measurement and test methods 11.2 Insulation resistance Applicable. Requirement The insulation resistance shall be not less than 104 MW.km. 11.3 Voltage test of dielectric Applicable with a voltage of 3 kV d.c. or 2 kV a.c. rms. 11.5.1 Mean characteristic impedance The mean characteristic impedance shall be 75 W ± 3 W. 11.6 Return loss Applicable, with required values in accordance with the following table. 11.7 Relative propagation velocity (velocity ratio) The value may be given in the Detail Specification for information. |
| 9 | 11.8 Longitudinal loss The longitudinal loss shall not exceed the values stated in the Detail Specification. The values shall be given for at least the following frequencies: 11.9 Regularity of impedance The measurement shall be performed on both ends of delivery lengths. When method A is used the regularity shall be better than 46 dB. When method B is used the regularity shall be better than 0,5 %. 11.10 Screening attenuation The screening attenuation shall be measured after subjecting the cable length to the test of 10.2.1 and shall be not less than 85 dB from 30 MHz up to 1 000 MHz. 11.11 Transfer impedance Under consideration. 12 Quality assessment procedures Under consideration. |
| 10 | Annex A (informative) A-deviations A-deviation: National deviation due to regulations, the alteration of which is for the time being outside the competence of the CEN/CENELEC member. This European Standard does not fall under any Directive of the EC. In the relevant CENELEC countries these A-deviations are valid instead of the provisions of the European Standard until they have been removed. |
| 11 | List of references See national foreword. |
| 12 | BS EN 50117-4:1996 BSI 389 Chiswick High Road London W4 4AL BSI – British Standards Institution 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. Revisions 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 ina… 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: 0181 996 7000. Fax: 0181 996 7001. 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 on standards BSI provides a wide range of information on national, European and international standards through its Library and its Technical… Subscribing members of BSI are kept up to date with standards developments and receive substantial discounts on the purchase pri… Copyright Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, of the publications of the international st… This does not preclude the free use, in the course of implementing the standard, of necessary details such as symbols, and size,… If permission is granted, the terms may include royalty payments or a licensing agreement. Details and advice can be obtained from the Copyright Manager. Tel: 0181 996 7070. |
