1、NEMA Standards PublicationNational Electrical Manufacturers AssociationANSI/NEMA WC 63.2-1996 (R2003)Performance Standard For Coaxial Premise Data Communications CablesApproved as an American National Standard ANSI Approval Date: June 20, 2005 NEMA Standards Publication ANSI/NEMA WC 63.2-1996 (R2003
2、) Performance Standard For Coaxial Premise Data Communications Cables Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia 22209 www.nema.org Copyright 2005 by the National Electrical Manufacturers Association. All rights including translat
3、ion into other languages, reserved under the Universal Copyright Convention, the Berne Convention for the Protection of Literary and Artistic Works, and the International and Pan American Copyright Conventions. NOTICE AND DISCLAIMER The information in this publication was considered technically soun
4、d by the consensus of persons engaged in the development and approval of the document at the time it was developed. Consensus does not necessarily mean that there is unanimous agreement among every person participating in the development of this document. The National Electrical Manufacturers Associ
5、ation (NEMA) standards and guideline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together volunteers and/or seeks out the views of persons who have an interest in the topic covered by this
6、 publication. While NEMA administers the process and establishes rules to promote fairness in the development of consensus, it does not write the document and it does not independently test, evaluate, or verify the accuracy or completeness of any information or the soundness of any judgments contain
7、ed in its standards and guideline publications. NEMA disclaims liability for any personal injury, property, or other damages of any nature whatsoever, whether special, indirect, consequential, or compensatory, directly or indirectly resulting from the publication, use of, application, or reliance on
8、 this document. NEMA disclaims and makes no guaranty or warranty, express or implied, as to the accuracy or completeness of any information published herein, and disclaims and makes no warranty that the information in this document will fulfill any of your particular purposes or needs. NEMA does not
9、 undertake to guarantee the performance of any individual manufacturer or sellers products or services by virtue of this standard or guide. In publishing and making this document available, NEMA is not undertaking to render professional or other services for or on behalf of any person or entity, nor
10、 is NEMA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this document should rely on his or her own independent judgment or, as appropriate, seek the advice of a competent professional in determining the exercise of reasonable care in any given circumstanc
11、es. Information and other standards on the topic covered by this publication may be available from other sources, which the user may wish to consult for additional views or information not covered by this publication. NEMA has no power, nor does it undertake to police or enforce compliance with the
12、contents of this document. NEMA does not certify, test, or inspect products, designs, or installations for safety or health purposes. Any certification or other statement of compliance with any health or safetyrelated information in this document shall not be attributable to NEMA and is solely the r
13、esponsibility of the certifier or maker of the statement. ANSI/NEMA WC 63.2-1996 (R2003) Page i Copyright 2005 by the National Electrical Manufacturers Association. CONTENTS Page Section 1 GENERAL. 1 1.1 Scope 1 1.2 Referenced Standards 1 Section 2 COAXIAL CABLES . 3 2.1 GENERAL. 3 2.2 MATERIALS 4 2
14、.2.1 Conductors 4 2.2.2 Insulations . 4 2.2.3 Jackets 4 2.3 ISO/IEC 8802-3 10BASE5 4 2.3.1 10B5/1 Components/Construction Details . 4 2.3.2 10B5P/1 Components/Construction Details 5 2.3.4 Ring Band Markings7 2.4 ISO/IEC 8802-3 10BASE2 7 2.4.1 10B2/1 Components/Construction Details 7 2.4.2 10B2P/1 Co
15、mponents/Construction Details 8 2.4.3 10B2/2 Components/Construction Details 8 2.4.4 10B2P/2 Components/Construction Details 9 2.4.5 Electrical Requirements and Characteristics 9 ANSI/NEMA WC 63.2-1996 (R2003) Page ii Copyright 2005 by the National Electrical Manufacturers Association. Foreword This
16、 standard has been developed by the High Performance Wire and Cable Section of NEMA in close coordination between manufacturers, users, third party certifying agencies and others having specialized experience. The High Performance Wire and Cable Section of NEMA periodically reviews this standard for
17、 any revisions necessary to keep it up to date. Proposed revisions or comments should be submitted to: Vice President, Technical Services National Electrical Manufacturers Association 1300 North 17th Street Rosslyn, Virginia 22209 At the time of the reaffirmation of this standard in 2003, the member
18、s of the NEMA High Performance Wire and Cable Section were: AFC Cable SystemsNew Bedford, MA and Freehold AmerCableEl Dorado, AR American Insulated Wire CorporationPawtucket, RI Belden CDT, Inc.Richmond, IN 47374 and St. Louis, MO Berk-Tek a Nexans CompanyElm City, NC Cable USA, Inc.Naples, FL Colem
19、an Cable Inc.Waukegan, IL Draka Comteq USA Inc.Franklin, MA Fisk Alloy Conductors, Inc.Hawthorne, NJ General CableUpper Saddle River, NJ 07458-1609 and Rocklin, CA Harbour Industries, Inc.Shelburne, VT Judd Wire, Inc.Turners Falls, MA Kaneka High-Tech Materials, Inc.Pasadena, TX Leoni Wire, Inc.Chic
20、opee, MA Leviton Manufacturing Co., Inc.Gardena, CA The Okonite CompanyRamsey, NJ Phelps Dodge High Performance ConductorsInman, SC Quirk Wire Company, Inc.West Brookfield, MA Radix Wire CompanyEuclid, OH Rea Magnet Wire Company, Inc.Fort Wayne, IN Rockbestos-Surprenant Cable CorporationEast Granby,
21、 CT Southwire CompanyCarrollton, GA Specialty Cable CorporationWallingford, CT Tyco Electronics/Raychem Wire Diameter: 0.0071 in. (0.18 mm) Overall diameter: 0.035 0.002 in. (0.89 0.05 mm) 2.4.1.2 Dielectric Core Solid polyethylene Diameter: 0.116 0.006 in. (2.95 0.15 mm) Eccentricity of the insulat
22、ed center conductor shall be 10% maximum 2.4.1.3 Shield Single braid of tinned copper wire Strand diameter: 0.005 in. (0.127 mm) Picks/in. (mm): 10.2 (0.40) 10% Ends: 7 Carriers: 16 Percent coverage: 95% nominal milliohms/meterFrequency (MHz)ANSI/NEMA WC 63.2-1996 (R2003) Page 8 Copyright 2005 by th
23、e National Electrical Manufacturers Association. 2.4.1.4 Jacket Polyvinyl chloride Diameter: 0.193 0.012 in. (4.90 0.30 mm) color: gray 2.4.2 10B2P/1 Components/Construction Details 2.4.2.1 Inner Conductor 19 strands of tinned copper wire Diameter: 0.0071 in. (0.18 mm) nominal Overall diameter: 0.03
24、5 0.002 in. (0.89 0.05 mm) 2.4.2.2 Dielectric Core Solid FEP Diameter: 0.116 0.006 in. (2.95 0.15 mm) Eccentricity of insulated center conductor shall be 10% maximum 2.4.2.3 Shield Single braid of tinned copper wire Strand diameter: 0.005 in. (0.127 mm) nominal Picks/in. (mm): 10.2 (0.40) 10% Ends:
25、7 Carriers: 16 Percent coverage: 95% minimum 2.4.2.4 Jacket Fluoropolymer or equivalent Diameter: 0.189 0.012 in. (4.80 0.30 mm) color: gray 2.4.3 10B2/2 Components/Construction Details 2.4.3.1 inner conductor 19 strands of tinned copper wire Diameter: 0.0079 in. (0.20 mm) nominal Overall diameter:
26、0.037 0.0003 in. (0.94 0.008 mm) 2.4.3.2 Dielectric Core Foam polyethylene Diameter: 0.099 0.007 in. (2.51 0.178 mm) Eccentricity of insulated center conductor shall be 10% maximum. 2.4.3.3 Shield Foil Layer: 0.0001 in. (0.0025 mm) adhesive/ 0.002 in. (0.051 mm) aluminum/ 0.00092 in. (0.025 mm) poly
27、ester/ 0.00035 in. (0.009 mm) aluminum Tape to be applied longitudinally with minimum 0.125 in. (3.18 mm) overlap, adhesive side facing core. Braid Layer: Tinned copper Strand diameter: 0.005 in. (0.127 mm) nominal ANSI/NEMA WC 63.2-1996 (R2003) Page 9 Copyright 2005 by the National Electrical Manuf
28、acturers Association. Picks/in. (mm): 12.5 (0.492) 10% Ends: 6 Carriers: 16 Percent coverage: 93% minimum Diameter: 0.135 in. (3.43 mm) nominal 2.4.3.4 Jacket Polyvinyl chloride Diameter: 0.185 0.004 in. (4.70 0.010 mm) Color: gray 2.4.4 10B2P/2 Components/Construction Details 2.4.4.1 Inner Conducto
29、r 19 strands of tinned copper wire Diameter: 0.0079 in. (0.20 mm) nominal Overall diameter: 0.037 0.0003 in. (0.94 0.008 mm) 2.4.4.2 Dielectric Core Foam FEP Diameter: 0.099 0.007 in. (2.51 0.178 mm) Eccentricity of center conductor shall be 10% maximum 2.4.4.3 Shield Foil Layer: 0.001 in. (0.025 mm
30、) adhesive/ 0.002 in. (0.051 mm) aluminum/ 0.00092 in. (0.025 mm) polyester/ 0.00035 in. (0.009 mm) aluminum Tape to be applied longitudinally with minimum 0.125 in. (3.18 mm) overlap, adhesive side facing core. Braid Layer: Tinned copper Strand diameter: 0.005 in. (0.127 mm) nominal Picks/in.(mm):
31、12.5 (0.492) 10% Ends: 6 Carriers: 16 Percent coverage: 93% minimum Diameter: 0.135 in. (3.43 mm) nominal 2.4.4.4 Jacket Suitable thermoplastic material Diameter: 0.165 0.007 in. (4.19 0.178 mm) Color: gray 2.4.5 Electrical Requirements and Characteristics The sum of the center conductor resistance
32、plus the shield resistance shall not exceed 15.24 /1000 ft (0.050 /m) at or corrected to 20C. The velocity of propagation shall not be less than 65% of the speed of light. The average characteristic impedance shall be 50 2 when measured in accordance with the methods of MIL-C-17 (TDR method). Period
33、ic variations in impedance along a single piece of cable may be up to 3 sinusoidal centered around the measured average value, with a period less than 6.56 ft (2 m). ANSI/NEMA WC 63.2-1996 (R2003) Page 10 Copyright 2005 by the National Electrical Manufacturers Association. The attenuation shall not
34、exceed 9.88 dB/1000 ft (3.24 dB/100 m) at 5 MHz and 14.0 dB/1000 ft (4.59 dB/ 100 m) at 10 MHz when tested at or corrected to 20C. The transfer impedance of the cable shall not exceed the value shown in Figure 2-2 as a function of frequency. The nominal capacitance is 26 pF/ft (85 pF/m). Figure 2-2 10BASE2 milliohms/meterFrequency (MHz)NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION 1300 NORTH 17TH STREET, SUITE 900 ROSSLYN. VA 22209www.NEMA.orgTO ORDER ADDITIONAL NEMA STANDARDS VISITWWW.GLOBAL.IHS.COM OR CALL 1-800-854-7179/1-303-397-79565612_0514TB
