NEMA TF 1-1993 Coated Electrical Sleeving《带涂层的电套管》.pdf

1、NEMA Standards PublicationNational Electrical Manufacturers AssociationNEMA TF 1-1993 (R2005)Coated ElectricalSleevingNEMA Standards Publication TF 1-1993 (R2000, R2005) Coated Electrical Sleeving Published by: National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn,

2、 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, the Berne Convention for the Protection of Literary and Artistic Works, and the International and

3、 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 document at the time it was developed. Consensus does not necessarily mean that there is unanimou

4、s 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 contained herein is one, are developed through a voluntary consensus standards development process. T

5、his 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 promote fairness in the development of consensus, it does not write the document and it does not ind

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7、ct, 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 implied, as to the accuracy or completeness of any information published herein, and disclaims an

8、d 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 sellers products or services by virtue of this standard or guide. In publishing and making this docu

9、ment 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 someone else. Anyone using this document should rely on his or her own independent judgment or, as ap

10、propriate, 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 may be available from other sources, which the user may wish to consult for additional views or i

11、nformation 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, designs, or installations for safety or health purposes. Any certification or other statement of

12、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. TF 1-1993 (R2000, R2005) Page i Copyright 2005 by the National Electrical Manufacturers Association. CONTENTS Page F

13、orewordiii Scope.iv Section 1 REFERENCED STANDARDS AND DEFINITIONS 1.1 Referenced Standards. 1 1.2 Definitions 1 Section 2 CLASSIFICATION 2.1 Types. 3 2.2 Grades. 3 Section 3 DIMENSIONAL REQUIREMENTS 3.1 Inside Diameter and Wall Thickness .5 3.2 Length 6 3.3 Splices . 6 Section 4 PERFORMANCE REQUIRE

14、MENTS 4.1 Electrical Requirements. 7 4.2 Non-Electrical Requirements. 7 4.3 Colors 7 Section 5 METHODS OF TEST 5.1 Procedures 9 5.2 Sampling 9 5.3 Conditioning. 9 5.4 Ovens 9 5.5 Dimensional Measurements 9 5.5.1 Apparatus and Materials. 9 5.6 Dielectric Breakdown Voltage 10 5.6.1 Apparatus and Mater

15、ials. 10 5.6.2 Test Specimens 10 5.6.3 Report. 11 5.7 Flammability. 11 5.7.1 Apparatus and Materials. 11 5.7.2 Procedure A, Vertical Burning Rate (Candle Test) 12 5.7.3 Procedure B, Horizontal Flame Test 13 5.8 Low-Temperature Flexibility 13 5.8.1 Apparatus . 13 5.8.2 Test Specimens 13 5.8.3 Procedu

16、re . 14 5.9 Oil Resistance . 14 5.9.1 Test Specimens 14 5.9.2 Procedure . 14 5.10 Compatibility with Insulated Wire. 16 TF 1-1993 (R2000, R2005) Page ii Copyright 2005 by the National Electrical Manufacturers Association. 5.10.1 Apparatus and Materials. 16 5.10.2 Test Specimens 16 5.10.3 Procedure .

17、 16 5.11 Effect of Axial Compression (Push-Back) . 17 5.11.1 Test Specimens 17 5.11.2 Procedure . 17 5.12 Thermal Endurance . 17 5.12.1 Test Specimens 17 5.12.2 Proof-Testing Specimens . 18 5.12.3 Selection of Exposure Temperature and Periods 18 5.12.4 Procedure . 18 5.12.5 Construction of Thermal L

18、ife Curves 18 5.12.6 Determination of the Temperature Index 18 5.13 Flexibility 19 5.13.1 Apparatus and Materials. 19 5.13.2 Procedure . 19 TABLES 2-1 Breakdown Voltage Requirements, kV, Minimum. 4 3-1 Inside Diameter and Wall Thickness .5 3-2 Tolerance on Cut Lengths . 6 3-3 Number of Allowable Spl

19、ices. 6 4-1 Chemical, Thermal, and Mechanical Requirements . 8 5-1 Sampling Schedule 9 5-2 Mandrels for Low-Temperature Flexibility Test . 15 5-3 Mandrels for Flexibility After Heat Aging Test . 19 FIGURES 5-1 Schematic Arrangement for Horizontal Flame Test 12 TF 1-1993 (R2000, R2005) Page iii Copyr

20、ight 2005 by the National Electrical Manufacturers Association. Foreword The Standards Publication has been prepared by the Electrical Tubing and Sleeving Section of the National Electrical Manufacturers Association and is intended primarily to establish test methods and performance characteristics

21、for flexible coated sleeving used for electrical insulation. These standards have been developed and revised over a period of years in close coordination with user needs. In addition, this Standards Publication has been closely coordinated with parallel standards writing efforts going on in Subcommi

22、ttee 15C of the International Electro-Technical Commission, ASTM, NAVSEA, and UL. This Standards Publication which was developed by the Electrical Tubing and Sleeving Section is reviewed periodically for any revisions that may be necessary to keep them up to date with advanced technology. Proposed o

23、r recommended revisions should be submitted to: Vice President, Technical Services Department National Electrical Manufacturers Association 1300 North 17th Street, Suite 1847 Rosslyn, Virginia 22209 This Standards Publication was developed by the Tubing and Sleeving Section. Section approval of the

24、standard does not necessarily imply that all section members voted for its approval or participated in its development. At the time it was reaffirmed in 2005, the Flexible Insulation and Mica Section was composed of the following members: Atkins & PearceCovington, KY Hilec, Inc.Arcade, NY Sofanou In

25、c.Troy, MI SuflexNewmarket, NH Sumitomo ElectricSanta Clara, CA Tyco Electronics/RaychemMenlo Park, CA TF 1-1993 (R2000, R2005) Page iv Copyright 2005 by the National Electrical Manufacturers Association. Scope This Standards Publication covers requirements for and the testing of flexible coated sle

26、eving used for electrical insulation. TF 1-1993 (R2000, R2005) Page 1 Copyright 2005 by the National Electrical Manufacturers Association. Section 1 REFERENCED STANDARDS AND DEFINITIONS 1.1 REFERENCED STANDARDS The following publications are adopted, in whole or in part, as indicated, by reference i

27、n this Standards Publication: American Society for Testing and Materials 100 Barr Harbor Drive West Conshohocken, PA 19428-2959 ASTM D149-1990 Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies, Standard Test Method for ASTM

28、D471-1979 Rubber PropertyEffect of Liquids, Standard Test Method for ASTM D618-1961(R 1981) Conditioning Plastics and Electrical Insulating Materials for Testing, Standard Methods of ASTM D1676-1988 Film-Insulated Magnet Wire, Standard Test Methods ASTM D2436-1985 Forced-Convection Laboratory Ovens

29、for Electrical Insulation, Specification for Institute of Electrical and Electronics Engineers Park Avenue, 17th Floor New York, NY 10016-5997 IEEE 1-1986 General Principles for Temperature Limits in the Rating of Electric Equipment and for the Evaluation of Electrical Insulation, Standard IEEE 98-1

30、984 Preparation of Test Procedures for the Thermal Evaluation of Solid Electrical Insulation Materials, Standard for IEEE 101-1987 Guide for the Statistical Analysis Underwriters Laboratories, Inc. 333 Pfingsten Road Northbrook, IL 60062 UL 1441-1981 Coated Electrical Sleeving 1.2 DEFINITIONS coated

31、 sleeving: A flexible, tubular product woven from cotton, rayon, nylon, glass or other fibers which is impregnated, coated, or impregnated and coated with an electrical insulating material. dielectric breakdown voltage: The voltage which an insulating material can withstand before breakdown occurs,

32、usually expressed in volts (ac, rms). Also known as puncture voltage. elastomer: A material which returns rapidly to approximately its initial state after substantial deformation by a stress and release of that stress. temperature index: A numerical value which indicates the continuous-duty use temp

33、erature of an insulating material. This value is determined by long-range heat-aging of test specimens under controlled conditions. In the case of coated sleeving, this corresponds to the temperature in degrees Celsius at which the material will retain 50% of its dielectric breakdown voltage after 2

34、0,000 hr exposure at that temperature. TF 1-1993 (R2000, R2005) Page 2 Copyright 2005 by the National Electrical Manufacturers Association. thermoplastic: A material capable of being repeatedly softened by heating and hardened by cooling through a temperature range characteristic of the material, an

35、d in the softened state, capable of being repeatedly shaped by flow. thermoset: A material which changes into a substantially infusible and insoluble product when cured by heat, radiation, catalysts, or other means, possibly in combination. TF 1-1993 (R2000, R2005) Page 3 Copyright 2005 by the Natio

36、nal Electrical Manufacturers Association. Section 2 CLASSIFICATION 2.1 TYPES Type 1A flexible treated sleeving made from organic-base fibers such as cotton, rayon, or nylon and impregnated or coated with an insulating material which can be shown by applicable experience or accepted test to have a te

37、mperature index of 105. Type 2A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material which can be shown by applicable experience or accepted test to have a temperature index of 130. Type 3A flexible treated sleeving made

38、 from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material, such as polyvinyl chloride, which can be shown by applicable experience or accepted test to have a temperature index of 105. Type 4A flexible treated sleeving made from inorganic-base yarns such a

39、s fibrous glass and impregnated or coated with an insulating material, such as silicone polytetrafluoroethylene, which can be shown by applicable experience or accepted test to have a temperature index of 200. Type 5A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and

40、 impregnated or coated with an insulating material, such as silicone elastomer, which can be shown by experience or accepted test to have a temperature index of 200. Type 6A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating ma

41、terial, such as epoxies, Polyesters, or acrylics, which can be shown by experience or accepted test to have a temperature index of 155. Type 7A flexible treated sleeving made from inorganic-base yarns such as fibrous glass and impregnated or coated with an insulating material which can be shown by e

42、xperience or accepted test to have a temperature index of 180. See IEEE Standard 98. 2.2 GRADES Grades of coated sleeving for each type are identified according to their dielectric breakdown voltage as given in Table 2-1. TF 1-1993 (R2000, R2005) Page 4 Copyright 2005 by the National Electrical Manu

43、facturers Association. Table 2-1 BREAKDOWN VOLTAGE REQUIREMENTS, kV, MINIMUM C48/23/50* C-96/23/93* Type Grad Avg Ind. Avg. Ind. E-96/(TI+50)*Avg. 1 A 7.0 5.0 2.1 1.5 4.0 B 4.0 2.5 1.2 0.8 C 2.5 1.5 2 A 7.0 5.0 2.1 1.5 4.5 B 4.0 2.5 1.2 0.8 C 2.5 1.5 3 A 8.0 6.0 4.0 3.0 4.0 B 4.0 2.5 2.0 1.3 C 2.5 1

44、.5 4 A 8.0 6.0 6.4 4.8 5.0 B 4.0 2.5 2.8 1.8 C 2.5 1.5 5 A 8.0 6.0 6.4 4.8 5.5 B 4.0 2.5 3.2 2.0 C 2.5 1.5 6 A 7.0 5.0 2.1 1.5 4.5 B 4.0 2.5 1.2 0.8 C 2.5 1.5 7 A 7.0 5.0 3.5 2.5 4.0 B 4.0 2.5 2.0 1.3 C 2.5 1.5 *Conditioning designations per ASTM D618 TF 1-1993 (R2000, R2005) Page 5 Copyright 2005 b

45、y the National Electrical Manufacturers Association. Section 3 DIMENSIONAL REQUIREMENTS 3.1 INSIDE DIAMETER AND WALL THICKNESS Coated sleeving shall meet the inside diameter and wall thickness requirements as shown in Table 3-1. Table 3-1 INSIDE DIAMETER AND WALL THICKNESS* Inside Diameter, in. (mm)

46、 Minimum Overall Wall Thickness in. (mm) Trade Size Maximum Minimum Grade A Grade B Grade C 30 AWG 0.018 (0.46) 0.010 (0.26) 0.011 (0.279) 0.007 (0.18) 0.006 (0.152) 28 AWG 0.020 (0.51) 0.012 (0.31) 0.011 (0.279) 0.007 (0.18) 0.006 (0.152) 26 AWG 0.022 (0.56) 0.016 (0.41) 0.011 (0.279) 0.007 (0.18)

47、0.006 (0.152) 24 AWG 0.027 (0.69) 0.020 (0.51) 0.011 (0.279) 0.007 (0.18) 0.006 (0.152) 22 AWG 0.032 (0.81) 0.025 (0.64) 0.013 (0.330) 0.007 (0.18) 0.006 (0.152) 20 AWG 0.039 ).99) 0.32 (0.81) 0.013 (0.330) 0.007 (0.18) 0.006 (0.152) 19 AWG 0.44 (1.11) 0.036 (0.91) 0.013 (0.330) 0.007 (0.18) 0.006 (

48、0.152) 18 AWG 0.049 (1.25) 0.040 (1.02) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 17 AWG 0.054 (1.37) 0.45 (1.14) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 16 AWG 0.061 (1.55) 0.051 (1.30) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 15 AWG 0.067 (1.70) 0.057 (1.45) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152

49、) 14 AWG 0.074 (1.88) 0.064 (1.63) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 13 AWG 0.082 (2.08) 0.072 (1.83) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 12 AWG 0.091 (2.31) 0.081 (2.06) 0.015 (0.381) 0.007 (0.18) 0.006 (0.152) 11 AWG 0.101 (2.6) 0.091 (2.31) 0.018 (0.457) 0.009 (0.23) 0.008 (0.203) 10 AWG 0.112 (2.8) 0.102 (2.6) 0.018 (0.457) 0.009 (0.23) 0.008 (0.203) 9 AWG 0.124 (3.2) 0.114 (2.9) 0.018 (0.457) 0.009 (0.23) 0.008 (0.203) 8 AWG 0.141 (3.6) 0.129 (3.3) 0.018 (0.457) 0.009 (0.23) 0.008