1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA WC 63.1-2005Performance Standard for Twisted Pair Premise Voice and Data Communications CablesNEMA Standards Publication WC 63.1-2005 Performance Standard for Twisted Pair Premise Voice and Data Communications Cables Publish
2、ed by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1752 Rosslyn, Virginia 22209 www.nema.org Copyright 2005 by the National Electrical Manufacturers Association. All rights including translation into other languages, reserved under the Universal Copyright Convention,
3、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 sound by the consensus of persons engaged in the development and approval of the
4、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 Association (NEMA) standards and guideline publications, of which the document cont
5、ained 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 publication. While NEMA administers the process and establishes rules to pro
6、mote 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 contained in its standards and guideline publications. NEMA disclaims liability for
7、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 this document. NEMA disclaims and makes no guaranty or warranty, express or
8、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 undertake to guarantee the performance of any individual manufacturer or sel
9、lers 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 is NEMA undertaking to perform any duty owed by any person or entity to some
10、one 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 circumstances. Information and other standards on the topic covered by this publication
11、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 contents of this document. NEMA does not certify, test, or inspect products,
12、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 responsibility of the certifier or maker of the statement. WC 63.1-2005 Page i
13、 Copyright 2005 by the National Electrical Manufacturers Association. CONTENTS Section 1 GENERAL 1 1.1 Scope . 1 1.2 Referenced Standards 1 Section 2 PART IDENTIFICATION NUMBER (PIN). 3 2.1 Part Numbering System 3 Section 3 MATERIALS AND MECHANICAL REQUIREMENTS 6 3.1 Conductors 6 3.1.1 Bare Copper W
14、ire 6 3.1.2 Tin Coated Copper Wire 6 3.1.3 Stranded Copper Wire . 6 3.2 Insulating Materials . 6 3.3 Shields . 6 3.3.1 Individually Shielded Pairs, Foil (When Specified) 6 3.3.2 Individually Shielded Pairs, Braid (When Specified) 6 3.3.3 Overall Shielded, Foil. 7 3.3.4 Overall Shielded, Braid 7 3.3.
15、5 Drain Wire(s) 7 3.3.6 Braided Shield 7 3.4 Mechanical, Physical, Dimensional, and Safety Considerations 7 Section 4 ELECTRICAL DEFINITIONS 8 4.1 Resistance . 8 4.1.1 DC Conductor Resistance . 8 4.1.2 DC Resistance Unbalance. 8 4.1.3 Insulation Resistance. 8 4.2 Input Impedance .8 4.3 Characteristi
16、c Impedance . 8 4.4 Structural Return Loss 9 4.4.1 Return Loss 9 4.5 Insertion Loss (Attenuation). 9 4.6 Crosstalk . 10 4.6.1 Near-End Crosstalk (Next). 10 4.6.2 Power Sum Near-End Crosstalk (Psnext) . 10 4.6.3 Far-End Crosstalk (Fext)/Equal Level Far-End Crosstalk (Elfext). 10 4.7 Capacitance 11 4.
17、7.1 Mutual Capacitance . 11 4.7.2 Pair-To-Ground Capacitance Unbalance 12 4.8 Transfer Impedance 12 4.9 Phase Velocity 12 4.10 Phase Delay 12 4.11 Phase Delay Skew 12 Section 5 TEST METHODS. 13 5.1 General . 13 5.2 Input Impedance . 13 5.3 Characteristic Impedance . 13 5.4 Structural Return Loss 13
18、5.4.1 Return Loss . 13 WC 63.1-2005 Page ii Copyright 2005 by the National Electrical Manufacturers Association. 5.5 Insertion Loss (Attenuation) 13 5.6 Near-End Crosstalk (Next) and Power Sum Near-End Crosstalk (Psnext) 13 5.7 Far-End Crosstalk (Fext), Equal Level Far-End Crosstalk (Elfext), and Po
19、wer Sum Equal Level Far-End Crosstalk (Pselfext) 13 5.8 Transfer Impedance 13 5.9 Phase Velocity 14 5.10 Phase Delay 14 5.11 Phase Delay Skew 14 Section 6 ELECTRICAL REQUIREMENTS FOR CATEGORY 3, 5, AND 5e CABLES 15 6.1 General . 15 6.2 Resistance 15 6.2.1 DC Resistance . 15 6.2.2 DC Resistance Unbal
20、ance. 15 6.2.3 Insulation Resistance. 15 6.3 Impedance 15 6.3.1 Characteristic Impedance 15 6.4 Structural Return Loss 15 6.4.1 Return Loss. 16 6.5 Insertion Loss (Attenuation) 16 6.5.1 Horizontal and Backbone Cables 16 6.5.2 Patch (Stranded) Cables 17 6.6 Crosstalk . 17 6.6.1 Near-End Crosstalk (Ne
21、xt) 17 6.6.2 Power Sum Near-End Crosstalk 18 6.6.3 Equal Level Far-End Crosstalk (Elfext) 18 6.6.4 Power Sum Equal Level Far-End Crosstalk (Pselfext) 19 6.7 Capacitance 19 6.7.1 Mutual Capacitance . 19 6.7.2 Pair-To-Ground Capacitance Unbalance 19 6.8 Transfer Impedance 19 6.9 Phase Velocity 19 6.10
22、 Phase Delay Skew 20 6.10.1 Maximum Phase Delay Skew 20 6.10.2 Cables Greater Than 4 Pairs . 20 6.10.3 Environmental Effects 20 Section 7 ELECTRICAL REQUIREMENTS FOR 150 TYPE A CABLE. 21 7.1 DC Resistance 21 7.1.1 22 AWG Conductors 21 7.1.2 26 AWG Conductors 21 7.2 DC Resistance Unbalance 21 7.3 Ins
23、ulation Resistance 21 7.4 Capacitance 21 7.4.1 Pair-to-Ground Capacitance Unbalance 21 7.5 Characteristic Impedance . 21 7.6 Structural Return Loss 21 7.7 Return Loss. 22 7.8 Insertion Loss (Attenuation) 22 7.9 Near-End Crosstalk. 22 7.10 Transfer Impedance 23 Appendix A ELECTRICAL PERFORMANCE REQUI
24、REMENTS AND REFERENCES FOR CATEGORY 3, CATEGORY 5, AND CATEGORY 5e CABLES. 24 WC 63.1-2005 Page iii Copyright 2005 by the National Electrical Manufacturers Association. Appendix B CABLES, BUILDING, PREMISE, PLENUM, SPECIAL PURPOSE, ELECTRICAL, MULTIPLE TWISTED PAIRS, 24 AWG, UNSHIELDED, INDIVIDUALLY
25、 SHIELDED PAIRS, OR OVERSHIELDED, JACKETED CATEGORY 5. 28 Appendix C CABLES, BUILDING, PREMISE, RISER, SPECIAL PURPOSE, ELECTRICAL, MULTIPLE TWISTED PAIRS, 24 AWG, UNSHIELDED, INDIVIDUALLY SHIELDED PAIRS, OR OVERSHIELDED, JACKETED CATEGORY 5 32 Appendix D PATCH CORD CABLES, BUILDING, PREMISE, SPECIA
26、L PURPOSE, ELECTRICAL, 24 AWG, STRANDED CONDUCTORS, MULTIPLE TWISTED PAIRS, UNSHIELDED, INDIVIDUALLY SHIELDED PAIRS, OR OVERSHIELDED, JACKETED CATEGORY 5 36 Appendix E CABLES, BUILDING, PREMISE, PLENUM, SPECIAL PURPOSE, ELECTRICAL, MULTIPLE TWISTED PAIRS, 22 AWG, UNSHIELDED, INDIVIDUALLY SHIELDED PA
27、IRS, OR OVERSHIELDED, JACKETED CATEGORY 5. 39 WC 63.1-2005 Page iv Copyright 2005 by the National Electrical Manufacturers Association. Foreword Compliance with this Standard may require use of an invention covered by patent rights. By publication of this Standard, no position is taken with respect
28、to the validity of this claim or of any patent rights in connection therewith. The patent holder has, however, filed a statement of willingness to grant a license under these rights on reasonable and non-discriminatory terms and conditions to applicants desiring to obtain such a license. Details may
29、 be obtained from the publisher. This standard has been developed by the Premise Wiring Subcommittee of 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 Performa
30、nce Wire and Cable Section of NEMA periodically reviews this standard for 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 22
31、209 Section approval of this standard does not necessarily imply that all section members voted for its approval or participated in its development. At the time this revision was approved, the Premise Wiring Committee had the following members: Belden CDT, Inc.Richmond, IN Berk-Tek a Nexans CompanyE
32、lm City, NC General CableHighland Heights, KY Harbour Industries, Inc.Shelburne, VT Judd Wire, Inc.Turners Falls, MA Phelps Dodge High Performance ConductorsInman, SC WC 63.1-2005 Page 1 Copyright 2005 by the National Electrical Manufacturers Association. Section 1 GENERAL 1.1 SCOPE This standard pr
33、imarily defines minimum electrical performance and allowable conductor sizes, stranding, and shielding for premise wiring cables for voice and data applications. The material and mechanical characteristics for these cables are covered under UL 444/CSA C 22.2 No. 214 where applicable. Definitions and
34、 applicable test methods are included herein. This standard covers Category 3,Category 5, and Category 5e, 100 ohm unshielded and shielded twisted pair, and 150 ohm shielded twisted pair cables for voice and/or data communication systems. This standard also includes several appendices that were deve
35、loped for U.S. Government reference. Requirements for Category 4 cable were removed from this edition as this cable is no longer widely used. The products covered in this Standard shall conform to the requirements of Part 68 of the FCC rules and regulations, as well as the applicable article(s) of t
36、he National Electrical Code and/or other national and local codes and safety standards. The performance requirements contained in this document are for cables as manufactured. The installed cabling system will have different characteristics. The performance of the installed cabling is a function of
37、its components (i.e. cable, connecting hardware, work area, equipment, and patch cords) and installation methods. Requirements for the performance of the installed cabling system are outside the scope of this document. 1.2 REFERENCED STANDARDS Copies of referenced documents may be obtained from the
38、appropriate sources as follows. American Society for Testing and Materials (ASTM) 100 Barr Harbor Drive West Conshohocken, PA 19428-2959 ASTM B 3- 01 Soft or Annealed Copper Wire ASTM B 8- 04 Concentric-Lay-Stranded Copper Conductors, Hard, Medium-Hard, or Soft ASTM B 33- 04 Tinned Soft or Annealed
39、Copper Wire for Electrical Purposes ASTM B 286- 02 Copper Conductors for Use in Hookup Wire for Electronic Equipment ASTM D 4566-98 Electrical Performance Properties of Insulations and Jackets for Telecommunications Wire “B” for Bare Copper or “T” for Tin Coated Copper Pairs = Number of pairs in cab
40、le (ie: 2, 4, 12, 25, etc.) Shield = Character for type of shield as determined from Table 2-3 Drain Wire = Character for drain wire; “D” if present Table 2-1a CATEGORY AND TYPE DESIGNATIONS Category Description 3 100 , 24 AWG or 22 AWG, shielded or unshielded, specified at frequencies up to 16 MHz
41、5 100 , 24 AWG or 22 AWG, shielded or unshielded, specified at frequencies up to 100 MHz 5e 100 , 24 AWG or 22 AWG, shielded or unshielded, specified at frequencies up to 100 MHz, with enhanced performance requirements Type Description A 150 , 22 AWG or 26 AWG, shielded, specified at frequencies up
42、to 300 MHz 1Shield refers to screen WC 63.1-2005 Page 4 Copyright 2005 by the National Electrical Manufacturers Association. Table 2-1b NEC/CEC TYPES Character Cable Types Description P MPP, CMP Plenum R MPR, CMR Riser G MPG, MP, CMG, CM General Purpose X CMX Limited Use H CMH Limited Use U - Unlist
43、ed 2Table 2-2a ALLOWABLE AWG SIZES AND STRANDING IN HORIZONTAL AND BACKBONE CABLE Character AWG Size Stranding A 22 Solid B 24 Solid C326 Solid Table 2-2b ALLOWABLE AWG SIZES FOR STRANDED CONDUCTORS IN PATCH CABLES Character AWG Size Stranding D 22 7 E 22 19 F 24 7 G 24 19 H 26 7 J 26 19 2Not NEC/CE
44、C listed. This type may include cables not for use within a building, where listing is not required. Specific construction requirements shall be mutually agreed upon by the manufacturer and customer. 326 AWG solid conductors are for Type A Cables only in Table 2-1a. WC 63.1-2005 Page 5 Copyright 200
45、5 by the National Electrical Manufacturers Association. Table 2-3 ALLOWABLE SHIELDING OPTIONS Character Description S Individually shielded pair, foil K Individually shielded pair, braid F Overall shielded, foil B Overall shielded, braid U Unshielded The following are examples of possible part numbe
46、rs: WC63-3GBB2U: 100 , Category 3, general purpose, 24 AWG, solid, bare copper, 2 pair, unshielded. WC63-5RBB4U: 100 , Category 5, riser, 24 AWG, solid, bare copper, 4 pair, unshielded WC63-5GFB4U: 100 , Category 5, general purpose, 24 AWG, 7 strand, bare copper, 4 pair, unshielded WC63-5EPBB4U: 100
47、 , Category 5e, plenum, 24 AWG, solid, bare copper, 4 pair, unshielded WC63-AGHT2SB: 150 , Type A, general purpose, 26 AWG, 7 strand, tinned copper, 2 pair, individually foil shielded pairs with an overall braid WC 63.1-2005 Page 6 Copyright 2005 by the National Electrical Manufacturers Association.
48、 Section 3 MATERIALS AND MECHANICAL REQUIREMENTS 3.1 CONDUCTORS Conductors shall conform to the requirements of the applicable ASTM document(s) with the exception that the requirements for “Dimensions and Permissible Variations” shall not apply. The minimum dimensions and maximum strand lay shall be
49、 in accordance with UL 444/CSA C 22.2 No. 214. Minimum elongation of solid conductors from a finished cable shall be in accordance with ICEA S-90-661. 3.1.1 Bare Copper Wire Bare copper wire shall conform to soft or annealed wire in accordance with ASTM B 3 except that the requirements for “Dimensions and Permissible Variations“ shall not apply. 3.1.2 Tin Coated Copper Wire Tin coated copper wire shall conform to soft or annealed wire in accordance with ASTM B 33 except that the requirements for “Dimensions and Permissible Variations“ sha
