1、BRITISH STANDARDBS EN 60794-2-50:2008Optical fibre cables Part 2-50: Indoor cables Family specification for simplex and duplex cables for use in terminated cable assembliesICS 33.180.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55
2、g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60794-2-50:2008This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 August 2008 BSI 2008ISBN 978 0 580 56291 4National forewordThis British Standard is t
3、he UK implementation of EN 60794-2-50:2008. It is identical to IEC 60794-2-50:2008.The UK participation in its preparation was entrusted by Technical Committee GEL/86, Fibre optics, to Subcommittee GEL/86/1, Optical fibres and cables.A list of organizations represented on this committee can be obtai
4、ned on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments/corrigenda issued since publicationDa
5、te CommentsEUROPEAN STANDARD EN 60794-2-50 NORME EUROPENNE EUROPISCHE NORM June 2008 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brus
6、sels 2008 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60794-2-50:2008 E ICS 33.180.10 English version Optical fibre cables - Part 2-50: Indoor cables - Family specification for simplex and duplex cables for use in terminated c
7、able assemblies (IEC 60794-2-50:2008) Cbles fibres optiques - Partie 2-50: Cbles intrieurs - Spcification de famille pour les cbles simplex et duplex utiliss dans les ensembles de cbles quips (CEI 60794-2-50:2008) Lichtwellenleiterkabel - Teil 2-50: LWL-Innenkabel - Familienspezifikation fr Simplex-
8、 und Duplexkabel fr den Einsatz als Patchkabel (IEC 60794-2-50:2008) This European Standard was approved by CENELEC on 2008-06-01. 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 national s
9、tandard 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
10、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, Bulgaria, Cyprus, the Czech Re
11、public, 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. Foreword The text of document 86A/1204/FDIS,
12、future edition 1 of IEC 60794-2-50, prepared by SC 86A, Fibres and cables, of IEC TC 86, Fibre optics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60794-2-50 on 2008-06-01. This standard is to be used in conjunction with EN 60794-1-1, EN 60794-1-2 and EN 60794-2.
13、 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) 2009-03-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2011-06-01 Annex ZA
14、has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60794-2-50:2008 was approved by CENELEC as a European Standard without any modification. _ 2 BS EN 60794-2-50:2008CONTENTS 1 2 3 4 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 5 5.1 5.2 5.2.1 5.2.2 5.2.3 5.2.4 5.2.5 5.2.6
15、5.2.7 5.2.8 5.2.9 5.3 5.3.1 5.3.2 5.4 5.5 Annex B (normative) METHOD E21 Sheath pull-off force for optical fibre cable for Annex C (normative) METHOD F11 Sheath shrinkage for optical fibre cable for use Annex D (normative) METHOD E22 Buffered fibre movement under compression in Annex E (normative) M
16、ETHOD F12 Temperature cycling for optical fibre cable for Annex F (normative) Guidance on the selection of tests applicable to optical fibre 3 BS EN 60794-2-50:2008Annex ZA (normative) Normative references to international publications with their corresponding European publications 31Scope.5 Normati
17、ve references .5 Terms and definitions .6 Construction.6 General .6 Optical fibres and primary coating .6 Buffer 6 Tube7 Strength and anti-buckling members .7 Sheath 7 Sheath marking .7 Examples of cable constructions .7 Tests 7 Dimensions .8 Mechanical requirements.8 Tensile performance8 Crush 8 Im
18、pact .9 Repeated bending .9 Bend9 Torsion 10 Bend at low temperature10 Kink.10 Sheath pull-off force 10 5.2.10 Buffered fibre movement in compression .11 Environmental requirements11 Temperature cycling 11 Sheath shrinkage.12 Transmission requirements .12 Fire performance.12 Annex A (informative) Ex
19、amples of some types of cable construction 13 use in patch cords 16 in patchcords 21 optical fibre cables for use in patchcords 23 use in patchcords .25 cables for use in patchcords .27 Bibliography30 4 BS EN 60794-2-50:2008Figure A.1 Simplex loose non-buffered fibre cable .13 Figure A.2 Simplex rug
20、gedized fibre cable .13 Figure A.3 Duplex loose non-buffered fibre cable.13 Figure A.4 Duplex ruggedized fibre cable.14 Figure A.5 Duplex ruggedized fibre zip cord.14 Figure A.6 Duplex ruggedized flat cable.14 Figure A.7 Duplex ruggedized round cable.15 Figure B.1 Schematic of test arrangement .18 F
21、igure B.2 Example of pulling jig19 Figure B.3 Cable sample preparation .20 Figure D.1 Test set up for fibre movement under compression.24 Table 1 Dimensions of buffered fibres7 Table 2 Temperature cycling severities 11 Table F.1 Cable test method summary.27 Table F.2 Cable testing agreement 29 OPTIC
22、AL FIBRE CABLES Part 2-50: Indoor cables Family specification for simplex and duplex cables for use in terminated cable assemblies 1 Scope This part of IEC 60794 is a family specification that covers requirements for simplex and duplex optical fibre cables for use in terminated cable assemblies or f
23、or termination with optical fibre passive components. 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 (includi
24、ng any amendments) applies. They complete the normative references already listed in the generic specification (IEC 60794-1-1 and IEC 60794-1-2) or in the sectional specification (IEC 60794-2 series). IEC 60068-2-14, Environmental testing Part 2: Tests. Test N: Change of temperature IEC 60189-1, Low
25、-frequency cables and wires with PVC insulation and PVC sheath Part 1: General test and measuring methods IEC 60793-1-1:2008, Optical fibres Part 1-1: Measurement methods and test procedures General and guidance IEC 60793-1-20, Optical fibres Part 1-20: Measurement methods and test procedures Fibre
26、geometry IEC 60793-1-21, Optical fibres Part 1-21: Measurement methods and test procedures Coating geometry IEC 60793-1-40, Optical fibres Part 1-40: Measurement methods and test procedures Attenuation IEC 60793-1-46, Optical fibres Part 1-46: Measurement methods and test procedures Monitoring of ch
27、anges in optical transmittance IEC 60793-2-10, Optical fibres Part 2-10: Product specifications Sectional specification for category A1 multimode fibres IEC 60793-2-50, Optical fibres Part 2-50: Product specifications Sectional specification for class B single-mode fibres IEC 60794-1-1, Optical fibr
28、e cables Part 1-1: Generic specification General IEC 60794-1-2:2003, Optical fibre cables Part 1-2: Generic specification Basic optical cable test procedures 5 BS EN 60794-2-50:2008IEC 60794-2, Optical fibre cables Part 2: Indoor cables Sectional specification IEC 60811-1-3, Common test methods for
29、insulating and sheathing materials of electric and optical cables Part 1-3: General application Methods for determining the density Water absorption tests Shrinkage test IEC 60811-1-4:1985, Common test methods for insulating and sheathing materials of electric cables Part 1: Methods for general appl
30、ication Section Four: Tests at low temperature Amendment 1 (1993) Amendment 2 (2001) ISO/IEC 11801, Information technology Generic cabling for customer premises 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 terminated cable assembly short l
31、ength of cable provisioned with a connector at both ends NOTE Examples from ISO/IEC 11801 are: Patchcords are used to establish connections on a patch panel. Typical length of the patchcord 1 m to 10 m. Work area cords are used to connect outlet to the terminal equipment. Typical length of the work
32、area cords according to this specification is between 1 m and 35 m. Equipment cords should fulfill the requirements of patchcords or work area cords depending on their application. 4 Construction 4.1 General In addition to the constructional requirements in IEC 60794-2, the following considerations
33、apply to simplex and duplex indoor cables for use in terminated cable assemblies. It is not the intention of this standard to specify the finished terminated cable assembly complete with terminations. The cable shall be designed and manufactured for an expected operating lifetime of 15 years. The ma
34、terials in the cable shall not present a health hazard within its intended use. There shall be no fibre splice in a delivery length. It shall be possible to identify each individual fibre throughout the length of the cable. 4.2 Optical fibres and primary coating Multimode or single-mode optical fibr
35、es meeting the requirements of IEC 60793-2-10, type A1a and A1b, and IEC 60793-2-50, type B, shall be used. 4.3 Buffer If a tight or semi-tight (loosely applied) buffer is required, it shall consist of one or more layers of inert material. Semi-tight tubes may be filled. Unless otherwise specified,
36、the buffer shall be removable in one operation over a length of 15 mm. Buffer dimensions are shown in Table 1. 6 BS EN 60794-2-50:2008Table 1 Dimensions of buffered fibres Nominal diameter (mm) 0,3 1,3 Tolerances (mm) 0,05 4.4 Tube One or two primary coated or buffered fibres are packaged (loosely o
37、r not) in a tube construction which may be filled. The tube may be reinforced with a composite wall. If required the suitability of the tube shall be determined by an evaluation of its kink resistance in accordance with IEC 60794-1-2, Method G7. 4.5 Strength and anti-buckling members The cable shall
38、 be designed with sufficient strength members to meet the requirements of this standard. The strength and/or anti-buckling member may be either metallic or non-metallic and may be located in the cable core and/or under the sheath and/or in the sheath. 4.6 Sheath The cable shall have a uniform overal
39、l protective sheath. The cable diameter shall be specified in the relevant detail specification (or product specification). Sheath removal is an important feature of these cables. This is tested by the method E21 described in Annex B of this standard. 4.7 Sheath marking If required, the cable shall
40、be marked as agreed between the customer and supplier. The marking shall be resistant to abrasion. 4.8 Examples of cable constructions Examples of some main types of cable construction are shown in Figures A.1 to A.7. Other configurations are not excluded if they meet the mechanical, environmental,
41、transmission and termination requirements given in this standard. 5 Tests Compliance with the specification requirements shall be verified by carrying out tests selected from the following subclauses. It is not intended that all tests be carried out in all cases, and Annex F provides guidance on the
42、 selection of tests. The tests to be applied and the frequency of testing shall be agreed between the customer and supplier. Some of the following tests can be performed on a short sample length of cable which is still an integral part of a longer length, thus making it possible to detect permanent
43、changes in attenuation. 7 BS EN 60794-2-50:2008Single-mode cables shall be measured at 1 550 nm and 1 625 nm and multimode1)cables shall be measured at 1 300 nm unless otherwise agreed. Measurements shall be carried out according to IEC 60793-1-40. If loops are used within a test to fix the ends of
44、a cable, the diameter shall not be so small as to cause excessive mode filtering in multimode fibre. Unless otherwise specified, all tests shall be carried out at ambient temperature, as described in IEC 60793-1-1, Clause 5. 5.1 Dimensions The fibre dimensions and tolerances shall be checked in acco
45、rdance with test method of IEC 60793-1-20 or IEC 60793-1-21. The diameter of the buffer and of the cable, as well as the thickness of the sheath, shall be measured in accordance with the methods of IEC 60189-1. 5.2 Mechanical requirements 5.2.1 Tensile performance Method: IEC 60794-1-2-E1A. Diameter
46、 of chuck drums and transfer devices: not less than the minimum dynamic bending diameter specified for the cable, at least 250 mm diameter. Rate of transfer device: either 100 mm/min or 100 N/min. Load: 100 N applied for 5 min for simplex cables, 200 N for 5 min for duplex cables. Length of sample:
47、sufficient to achieve the desired accuracy of measurement of attenuation change and shall be agreed between the customer and the supplier. Requirements: the maximum increase in attenuation during the test shall be specified in the product specification, there shall be no change in attenuation after
48、the test, and there shall be no damage to the cable elements. 5.2.2 Crush Method: IEC 60794-1-2-E3. Force: 500 N. Duration: 1 min. Length between test locations: 500 mm. Requirements: the maximum increase in attenuation during the test shall be specified in the product specification, there shall be
49、no change in attenuation after the test, and there shall be no damage to the cable elements. NOTE For cables having a non-circular cross section, the force should be applied in the direction of the minor axis (perpendicular to the major axis). _ 1)OM3 multimode cables should be tested at 850 nm and may be tested at 1 300 in addition, all other multimode cables should be tested at 1 300 nm. 8 BS EN 60794-2-50:2
