1、Communication cablesPart 2-20: Common design rules and construction GeneralBS EN 50290-2-20:2016BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06National forewordThis British Standard is the UK implementation of EN 50290-2-20:2016.It supersedes BS EN 50290-2-20:2001 w
2、hich is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee EPL/46, Cables, wires and waveguides, radio frequency connectors and accessories for communication and signalling.A list of organizations represented on this committee can be obtained onrequest to its secre
3、tary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 93151 2ICS 29.060.20; 33.120.10Compliance with a British Standa
4、rd cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2016.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 50290-2-20:2016EUROPEAN STANDARD NORME EUROP
5、ENNE EUROPISCHE NORM EN 50290-2-20 October 2016 ICS 33.120.10 Supersedes EN 50290-2-20:2001 English Version Communication cables - Part 2-20: Common design rules and construction - General Cbles de communication - Partie 2-20: Rgles de conception communes et construction - Gnralits Kommunikationskab
6、el - Teil 2-20: Gemeinsame Regeln fr Entwicklung und Konstruktion - Allgemeines This European Standard was approved by CENELEC on 2016-07-22. 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
7、 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CENELEC member. This European Standard exists in three official versions (English, French, Germa
8、n). 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,
9、 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, Slovakia, Slovenia, Spain, Sweden, Sw
10、itzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CENELEC All rights of exploitation
11、in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 50290-2-20:2016 E BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 2 Contents Page European foreword . 3 1 Scope . 4 2 Normative references . 4 3 Rounding rules . 4 4 Polymer nomenclature 4 5 Maximum operating temperature 5
12、6 Quality assessment 6 7 Usage of own reprocessable material . 6 8 Fire Hazard 6 9 Health, Safety and Environmental (HSE) Regulation . 7 Annex A (informative) Structure of EN 50290-2-X series of standards 8 Bibliography 9 BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 3 European foreword This document
13、(EN 50290-2-20:2016) has been prepared by a joint working group of the Technical Committees CENELEC TC 46X, “Communication cables“, and CENELEC TC 86A, “Optical fibres and optical fibre cables“. The following dates are fixed: latest date by which this document has to be implemented at national level
14、 by publication of an identical national standard or by endorsement (dop) 2017-07-22 latest date by which the national standards conflicting with this document have to be withdrawn (dow) 2019-07-22 Attention is drawn to the possibility that some of the elements of this document may be the subject of
15、 patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 50290-2-20:2001. BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 4 1 Scope EN 50290-2-X contains, in its various parts, the requirements for polymeric insulating, s
16、heathing and covering materials that are used for metallic and optical fibre cables (Table 1). Table 1 Materials currently used in metallic and optical fibre communication cables (informative) Standard Application Materials Insulation/Buffer Sheath EN 50288 (excluding -7) Multi element metallic cabl
17、es (data cable) PE, PP, FEP PVC, HFFR-LS, FEP EN 50288-7 Multi element metallic cables (instrument, fieldbus generally 30 100C above the required operating temperature. This may be impossible for thermoplastic polymers (which melt typically at 110C) due to melt deformation, conductor adhesion or cha
18、nges in performance due to non oxidative causes (eg. (re)crystalisation). In such cases the operating temperature shall be justified by means of historical data on the application. BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 6 6 Quality assessment The current series of documents defines tests, metho
19、ds and values which are suitable for inclusion in quality assurance standards based on processes such as described in EN ISO 9001. Typically quality assurance processes may require: Technical Delivery Specifications. Compound test shall be carried out on granules, moulded plaques, extruded tapes or
20、other suitable specimen produced from granules of compound. This data shall be provided by the compound supplier. Batch Quality Certificates. Compound test shall be carried out on granules or moulded plaques produced from granules of compound. This data shall be provided by the compound supplier. Ty
21、pe Approval statements. Compound test shall be carried out on cable samples produced from granules of compound. The compound supplier shall make an agreement with a cable maker to access such test data. Certificate of Conformity and other technical documents The detailed definition of these document
22、s is a matter for negotiation between the material supplier and the cable maker. The technical requirements shall be at least equivalent to the values specified in the current series. More demanding or narrower requirements shall be deemed to meet the values defined in the current series. It is reco
23、gnised that some tests are useful to monitor material quality and are carried out more frequently. Other tests are more linked to the intrinsic properties of the formulation and are rarely undertaken. Such tests are unsuitable to be included in any Batch Quality Certificate. 7 Usage of own reprocess
24、able material In principal clean material prepared from extruder purge and material resulting from the disassembly of cables can be reprocessed to the intended application after having been previously processed by the same manufacturer. The key requirement is that careful production management is ne
25、eded to ensure the cleanliness of such material. Contaminated material shall be scrapped The exceptions to this rule are arising materials which contain reactive ingredients such as crosslinking systems and chemical foaming agents. Such materials shall not be reprocessed for the manufacture of new p
26、roducts. 8 Fire Hazard Fire statistics demonstrate that the majority of fatalities resulting from fire are due to asphyxiation following exposure to incapacitating smoke. The topic is complex as often technologies which reduce the fire intensity result in an increase in effluent hazard. The complete
27、 combustion of most polymeric materials results in the formation of carbon dioxide and water which are not considered hazardous. However incomplete combustion will result in the formation of carbon monoxide which is a principal cause of asphyxiation. Furthermore a product which gives a satisfactory
28、performance in one fire scenario may be completely unsatisfactory in another scenario. The key factors are: Product loading/compartment volume/ventilation Intensity of fire source Product composition. Attributes relating to the yield of heat, smoke and specific chemicals BS EN 50290-2-20:2016EN 5029
29、0-2-20:2016 (E) 7 A number of investigations1,2of the potential hazard arising from cable fires have been published utilising hazard criteria derived from ISO 13571. In response to the perceived need for improved fire safety the cable industry3has developed cables offering a reduced yield of smoke a
30、nd incapacitating gases. These cables are marketed using the acronym LFH and are produced using the appropriate HFFR-LS insulation and/or sheathing materials. 9 Health, Safety and Environmental (HSE) Regulation The European regulation (EC) No 1907/2006 on Registration, Evaluation, Authorisation and
31、Restriction of Chemicals (REACH) became effective as of June 1, 2007 and applies to the entire value chain of the chemical industry. Compliance with REACH requires a regulatory evaluation and registration or authorisation for chemical substances, which are manufactured in or imported to the European
32、 Economic Area. The materials described in EN 50290-2-X comply with all REACH legal obligations. Specifically the pre-registration shall have been completed for all the additives contained in the materials specified. In addition registration shall also have been completed or be proceeding. Obligatio
33、ns given by an inclusion of substances into the candidate list (substances of very high concerns - SVHC), as well as obligations in regard to Authorisation and Restriction of substances have to be fully observed. The material complies with Directive 2011/65/EU (Restriction of the use of certain Haza
34、rdous Substances in electrical and electronic equipment - RoHS, repealing Directive 2002/95/EC). This Directive prohibits the use of lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls (PBBs) and polybrominated diphenylethers (PBDEs), bis(2-ethylhexyl) phthalate (DEHP), butyl benzy
35、l phthalate (BBP), dibutyl phthalate (DBP) and diisobutyl phthalate (DIBP) in certain of electronic products defined in the directive. The tolerated limits are 0,1 wt% for Hg, Pb, Cr(VI), PBBs, PBDEs and phthalates and 0,01 wt% for Cd. The material complies with Regulation of the European Parliament
36、 and of the council (EC) No 850/2004 of 29 April 2004 on persistent organic pollutants (POPs). This Regulation prohibits production, placing on the market and use of substances subject to the Stockholm Convention on Persistent Organic Pollutants. The substances (Aldrin, Chlordane, Dieldrin, Endrin,
37、Heptachlor, Hexachlorobenzene, Mirex, Toxaphene, Polychlorinated Biphenyls (PCB), DDT (1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane), Chlordecone, Hexabromobiphenyl and HCH (including lindane) are listed in Annex I and shall not be produced or placed on the market on their own, in preparations or a
38、s constituents of articles. All future editions of these requirements are to be applied. 1Simulation of critical evacuation conditions for a fire scenario involving cables and comparison of two different cables, Patrick van Hees, Daniel Nilsson and Emil Berggren, Department of Fire Safety Engineerin
39、g and System Safety Lund University, Sweden , Report 3147, Lund 2010 2Assessment of the impact of computed and measured fire environments on building evacuation using bench and real scale test data, Robinson J E, Hull T R, Stec A A, Galea E R, Mahalingam A, Jia F, Patel M K, Persson H & Journeaux T,
40、 Interflam Conf. Proc., London 2007 3http:/ BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 8 Annex A (informative) Structure of EN 50290-2-X series of standards The current EN 50290-2-X series of standards has been structured firstly on a polymer and secondly on an application basis. Some materials are
41、 not application specific and may be described in a generic standard. For other materials, functional requirements have resulted in the development of specific application based formulations. Currently the EN 50290-2-X series consists of 38 parts (Table A.1) Table A.1 Parts of EN 50290-2 series Stan
42、dard Subject Comments EN 50290-2-20 Common Design Rules EN 50290-2-21 PVC Insulation See Corrigendum EN 50290-2-22 PVC Sheath EN 50290-2-23 PE Insulation for multi-pair Application restricted to cables used in access telecom EN 50290-2-24 PE Sheath for metallic cable EN 50290-2-25 PP Insulation for
43、data cable Application restricted to interior application EN 50290-2-26 Polyolefin based HFFR-LS Insulation EN 50290-2-27 Polyolefin based HFFR-LS Sheath EN 50290-2-28 Filling Compounds EN 50290-2-29 XLPE Insulation Instrument and field bus cable EN 50290-2-30 FEP Insulation and Sheath EN 50290-2-31
44、 Polyurethane sheathing Under consideration EN 50290-2-32 Free EN 50290-2-33 PE for Data Cables Application restricted to interior application EN 50290-2-34 PE sheath for outdoor optical fibre cables Including guidance for the selection of compounds offering reduced cable shrinkge EN 50290-2-35 Poly
45、amide EN 50290-2-36 Silicone based HFFR-LS Cables EN 50290-2-37 PE insulation for Coax Cables EN 50290-2-38 PP insulation for Coax Cables BS EN 50290-2-20:2016EN 50290-2-20:2016 (E) 9 Bibliography EN ISO 9001, Quality management systems Requirements (ISO 9001) EN ISO 11469, Plastics Generic identifi
46、cation and marking of plastics products (ISO 11469) ISO 13571, Life-threatening components of fire Guidelines for the estimation of time to compromised tenability in fires EUROPEAN REGULATION (EC) NO. (Original work published 1907)Registration, Evaluation, Authorisation and Restriction of Chemicals.
47、 REACH, 2006 European Directive 2011/65/EU - Restriction of the use of certain Hazardous Substances in electrical and electronic equipment - RoHS Regulation of the European Parliament and of the council (EC) No 850/2004 - Persistent organic pollutants (POPs). BS EN 50290-2-20:2016This page deliberat
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