ANSI ICEA S-70-547-2016 Weather-Resistant Polyethylene Covered Conductors.pdf

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1、 STANDARD FOR WEATHER-RESISTANT POLYETHELENE COVERED CONDUCTORS ANSI/ICEA S-70-547-2016 2016 by INSULATED CABLE ENGINEERS ASSOCIATION, Inc. ANSI/ICEA S-70-547-2016 ANSI/ICEA Publication S-70-547-2016 Standard For Weather-Resistant Polyethylene Covered Conductors Developed and Published By Insulated

2、Cable Engineers Association, Inc. Approved March 13, 2014 by INSULATED CABLE ENGINEERS ASSOCIATION, Inc. Approved, June 27, 2016 AMERICAN NATIONAL STANDARDS INSTITUTE Copyright 2016 by the Insulated Cable Engineers Association, Incorporated. All rights including translation into other languages, re

3、served 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 sound by the consensus of person

4、s 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 Insulated Cable Engineers Association, Inc. (ICEA) standards and gui

5、deline publications, of which the document contained herein is one, are developed through a voluntary consensus standards development process. This process brings together persons who have an interest in the topic covered by this publication. While ICEA administers the process and establishes rules

6、to promote fairness in the development of consensus, 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. ICEA disclaims liability for personal injury, property, or

7、 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. ICEA disclaims and makes no guaranty or warranty, expressed or implied, as to the accuracy or c

8、ompleteness 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. ICEA does not undertake to guarantee the performance of any individual manufacturer or sellers products or services by vir

9、tue of this standard or guide. In publishing and making this document available, ICEA is not undertaking to render professional or other services for or on behalf of any person or entity, nor is ICEA undertaking to perform any duty owed by any person or entity to someone else. Anyone using this docu

10、ment 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 may be available from other sour

11、ces, which the user may wish to consult for additional views or information not covered by this publication. ICEA has no power, nor does it undertake to police or enforce compliance with the contents of this document. ICEA does not certify, test, or inspect products, designs, or installations for sa

12、fety or health purposes. Any certification or other statement of compliance with any health or safety-related information in this document shall not be attributable to ICEA and is solely the responsibility of the certifier or maker of the statement. ANSI/ICEA S-70-547-2016 Page i 2016 by the Insulat

13、ed Cable Engineers Association, Incorporated Contents Page Foreword iii Section I General 1.1 Scope 1 1.2 Design Options 1 1.3 Operating Conditions 2 1.4 Testing and Test Frequency 2 1.5 Test Methods 2 1.6 Definitions Section 2 Conductors 2.0 General 3 2.1 Physical and Electrical Properties 3 2.1.1

14、Copper Conductors 3 2.1.2 Aluminum Conductors 3 2.1.3 Aluminum Conductor, Coated-Steel Reinforced. 4 2.1.4 Aluminum Conductor, Aluminum-Clad Reinforced 4 2.1.5 Copper and Copper-Clad Steel Composite 4 2.2 Conductor Size Units. 4 2.3 Conductor dc Resistance Per Unit Length 4 2.3.1 Direct Measurement

15、of dc Resistance Per Unit Length 5 2.3.2 Calculation of dc Resistance Per Unit Length 5 2.4 Conductor Rated Strength 5 2.5 Conductor Diameter 6 Section 3 Covering 3.1 Material 7 3.1.1 Requirements for 75C Covering for Normal Service Operation 7 3.1.2 Requirements for 90C Covering for Normal Service

16、Operation 7 3.2 Covering Thickness Requirements 7 3.3 Covering Physical Requirements 7 3.4 Separator 7 Section 4 Performance Requirements For Finished Conductors 4.1 General 16 4.2 Strength of Covered Conductors 16 Section 5 Test Methods For Coverings 5.1 Method for Measuring Covered Physical and Ai

17、r Oven Aging Properties 17 5.2 Method for Measuring Covering Heat Deformation (Distortion) 17 5.3 Method for Measuring Covering Hot Creep 17 5.4 Method for Measuring Absorption Coefficient 17 ANSI/ICEA S-70-547-2016 Page ii 2016 by the Insulated Cable Engineers Association, Incorporated Page Section

18、 6 Qualification Tests 6.1 General 18 6.2 Method for Determining Resistance to Environmental Stress Cracking 18 6.3 Sunlight Resistance of Covering Materials with Less than 2 Percent Carbon Black 18 6.3.1 Qualification 18 6.3.2 Sunlight Resistance 18 6.3.2.1 Carbon-Arc Weather-O-Meter 18 6.3.2.2 Xen

19、on-Arc Weather-O-Meter 18 APPENDICES A Titles and Dates of Industry Standards Referenced in this Document 20 B Recommended Bending Radii for Covered Conductors 22 C English/Metric Conversion 22 LIST OF TABLES 3-1 Aluminum 1350 Conductor Constructions 8 3-1 (Metric) Aluminum 1350 Conductor Constructi

20、ons 9 3-2 Aluminum Conductors, Coated-Steel Reinforced (ACSR), and Aluminum-Clad Steel Reinforced (ACSR/AW) Constructions 10 3-2 (Metric) Aluminum Conductors, Coated-Steel Reinforced (ACSR), and Aluminum-Clad Steel Reinforced (ACSR/AW) Constructions 11 3-3 Aluminum-Alloy 6201-T81 Conductor Construct

21、ions 12 3-3 (Metric) Aluminum-Alloy 6201-T81 Conductor Constructions 12 3-4 Copper Conductor Constructions 13 3-4 (Metric) Copper Conductor Constructions 14 3-5 Covering Physical Requirements 15 6-1 Qualification Test Requirements 19 ANSI/ICEA S-70-547-2016 Page iii 2016 by the Insulated Cable Engin

22、eers Association, Incorporated Foreword ICEA standards and guides are adopted in the public interest and are designed to eliminate misunderstanding between the manufacturer and user and to assist the user in selecting and obtaining proper products for his particular need. Existence of an ICEA standa

23、rd or guide does not in any respect preclude the manufacture or use of products not conforming to the standard or guide. The user of this Standard is cautioned to observe any applicable health or safety regulations and rules relative to the manufacture and use of cable made in conformity with this S

24、tandard. This Standard hereafter assumes that manufacture; testing, installation and maintenance of cables defined by this publication will be performed only by properly trained personnel using suitable equipment. Requests for interpretation of this Standard must be submitted in writing to the Insul

25、ated Cable Engineers Association at the address below. An official written interpretation will be provided. Suggestions for improvements gained in the use of this Standard will be welcomed by the Association. Copyrighted by the ICEA Contents may not be reproduced in any form without permission of th

26、e INSULATED CABLE ENGINEERS ASSOCIATION, INC. ANSI/ICEA S-70-547-2016 Page iv 2016 by the Insulated Cable Engineers Association, Incorporated ANSI/ICEA S-70-547 2016 Page 1 2016 by the Insulated Cable Engineers Association, Incorporated Section 1 GENERAL 1.1 SCOPE This standard applies to the mater

27、ials, constructions, and testing of weather-resistant thermoplastic and crosslinked polyethylene covered conductors, rated for 75C or 90C normal service temperature. These conductors are intended primarily for the distribution of electrical energy under normal conditions of overhead (aerial) install

28、ations and service outdoors. This standard does not cover Track Resistant Coverings or constructions. The coverings carry no voltage rating, and the conductors must be installed on insulators adequate for the service voltage. The user may want to give consideration to the dielectric compatibility of

29、 the covering, insulator, and conductor/insulator tie. When reference is made in this publication to an industry standard, that reference is to the standard with the title and date of issue listed in Appendix A. Where a conflict exists between the requirements of this standard and those of a referen

30、ced standard, the requirements of this standard shall apply. The recommended bending radii for conductors are given in Appendix B. U.S. Customary units, except for temperature, are specified throughout this standard and are the controlling units. Approximate International System of Units (SI) equiva

31、lents are included for information only. The rounding-off method of ASTM E 29 shall be used for determining conformance with requirements. To convert from an English unit to the appropriate SI unit, multiply the value of the English unit by the appropriate number from Appendix C. 1.2 DESIGN OPTIONS

32、The user of this standard should recognize that it covers many options. The user should select the necessary options required for a complete description of the covered conductors. This standard covers constructions with substantially different rated strengths. The user of this standard should determ

33、ine that the rated breaking strength of each conductor used for each application is adequate for that application, as determined by Paragraph 4.2 and the relevant ASTM standard for the bare version of that conductor, and the requirements of the latest edition of the National Electrical Safety Code.

34、The Aluminum Association Publication No. 50 “Code Words for Overhead Aluminum Electrical Conductors“, lists the code words that have been registered for aluminum conductors. Code words in Tables 3-1 through 3-3 are for information only. ANSI/ICEA S-70-547 2016 Page 2 2016 by the Insulated Cable Engi

35、neers Association, Incorporated 1.3 OPERATING CONDITIONS The design and construction of the cable shall be such that the cable will operate satisfactorily under the normal conditions of overhead line (aerial) service maximum conductor temperatures as follows: Conductor Operating Temperature, C * Cov

36、ering Type Normal Service Emergency Overload Short Circuit Thermoplastic Polyethylene 75 95 150 Crosslinked Polyethylene 90 130 250 * Exception: When adequate knowledge of the thermal characteristics of a cable environment is lacking, the permissible conductor temperature should be reduced by 10C or

37、 in accordance with available data. The 75C or 90C “Normal Service Operation“ temperature is the highest allowable temperature attained by the hottest portion of a cable line during daily operating load cycles. It shall be used in ampacity calculations where adequate information is known about the o

38、verall thermal characteristics of the cable environment to ensure that the normal service temperature will not be exceeded. The 95C or 130C “Emergency Overload Operation“ temperature is the highest allowable temperature attained by the hottest portion of a cable line during an emergency. Operation a

39、t that overload temperature shall not exceed 100 hours in any twelve consecutive months or 500 hours during the lifetime of the cable. The 150C or 250C “Short Circuit Operation“ temperature is the highest allowable temperature attained by a phase conductor along any part of the cable line during a s

40、hort circuit of a specified magnitude and number of cycles. See the latest edition of ICEA Publication P-32-382. 1.4 TESTING AND TEST FREQUENCY All cables shall comply with the requirements given in Parts 2 and 3. This standard does not specify any frequency for sampling (for test) of cable products

41、 or components. One program of sampling frequencies is given in the latest edition of ICEA T-26-465/NEMA WC 54. 1.5 TEST METHODS Except where test and measurement methods are specifically detailed or modified by this standard, the methods and procedures used to determine compliance with the requirem

42、ents are those applicable in the latest edition of ICEA T-27-581/NEMA WC 53 and the other industry standards referenced in this standard. ANSI/ICEA S-70-547 2016 Page 3 2016 by the Insulated Cable Engineers Association, Incorporated 1.6 DEFINITIONS Covered Conductor: A conductor covered with an extr

43、uded layer(s) having no voltage rating. Covered Conductor (NESC) A conductor covered with a dielectric having no rated insulating strength or having a rated insulating strength less than the voltage of the circuit in which the conductor is used. Filled Crosslinked Polyethylene Insulation: XLPE insul

44、ation containing 10 percent or more of carbon black and/or mineral fillers by weight. Line Wire A non-track resistant covered conductor Thermoplastic: A polymeric material, which repeatedly can be softened by heating and hardened by cooling through a temperature range characteristic of the material

45、and that, in softened state, can be shaped through the application of force. Thermoset: A polymeric material which when crosslinked, will not flow on subsequent heating. Crosslinking is accomplished either chemically or by irradiation. Tree Wire: Track resistant covered overhead conductor, used to d

46、irectly replace bare wire spans where trees crowd the right-of-way, such as in wooded residential areas, when a minimum interference with the environment is desired. Track Resistant: The property of a material to resist the development of a partially conducting path of localized deterioration on its

47、 surface under a given voltage and time Unfilled Crosslinked Polyethylene: XLPE insulation containing less than 10 percent of carbon black and/or mineral filler by weight. ANSI/ICEA S-70-547 2016 Page 4 2016 by the Insulated Cable Engineers Association, Incorporated Section 2 CONDUCTORS 2.0 GENERAL

48、Conductors shall meet the requirements of the appropriate ASTM standards referenced in this standard. Diameters shall be in accordance with Paragraph 2.5. 2.1 PHYSICAL AND ELECTRICAL PROPERTIES The conductors used in the cable shall be copper in accordance with 2.1.1, aluminum in accordance with 2.1

49、.2, aluminum conductor coated-steel reinforced in accordance with 2.1.3, aluminum conductor aluminum-clad reinforced in accordance with 2.1.4 and copper and copper clad-clad steel conductors in accordance with 2.1.5. The outer layer of an uncoated stranded copper conductor may be tin coated to obtain free stripping of an adjacent polymeric layer. 2.1.1 Copper Conductors ASTM B 1 for hard-drawn copper wire. ASTM B 2 for medium-hard-drawn copper wire. ASTM B 5 for electrical grade copper. AST