1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 4703 Photovoltaic WireUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTIO
2、N OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Photovoltaic Wire, UL 4703 First Edition, Dated September 30, 2014 Summary of Topics This is the rst edition of the Standard for Safety for Photovoltaic Wire, ANSI/UL 4703. The new requirements are substantially in accordance wi
3、th Proposal(s) on this subject dated October 18, 2013 and May 9, 2014. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of U
4、L. UL provides this Standard as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, inclu
5、ding loss of prots, lost savings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price
6、 paid for this Standard, regardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from a
7、ny error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, gures, and/or other elements of the Standard having future effective dates as indi
8、cated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. Future Effective Date Reference September 30, 2015 Paragraph(s) 6.1.1, 6.1
9、.2, 12.1(k). SEPTEMBER 30, 2014 UL 4703 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 30, 2014 UL 4703 tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION
10、FROM UL September 30, 2014 1 UL 4703 Standard for Photovoltaic Wire Prior to the rst edition, the requirements for the products covered by this standard were included in the Outline of Investigation for Photovoltaic Wire, UL 4703. First Edition September 30, 2014 This ANSI/UL Standard for Safety con
11、sists of the rst edition. The most recent designation of ANSI/UL 4703 as an American National Standard (ANSI) occurred on September 30, 2014. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revision
12、s on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard shoul
13、d be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2014 UNDERWRITERS LABORATORIES INC. ANSI/UL 4703-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DIS
14、TRIBUTION WITHOUT PERMISSION FROM UL SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .4 2 Units of Measurement .4 3 Undated References 4 4 Glo
15、ssary .4 CONSTRUCTION 5 General 5 6 Conductors .5 6.1 General .5 7 Insulation 7 7.1 Thermoplastic Insulation (90C Dry and Wet, 600 Volts) 7 7.2 Thermoset insulation and jacket (90, 105, 125, or 150C dry and 90C wet, 600, 1000, or 2000 volts) 7 8 Assemblies 10 8.1 Assemblies that include single condu
16、ctors 10 PERFORMANCE 9 Details 11 MANUFACTURING AND PRODUCTION 10 Manufacturing and Production Tests 12 MARKING 11 On the Wire 12 12 On the Tag, Reel, or Carton .13 SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT
17、 PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 This standard covers single-conductor, insulated and integrally or non-integrally jacketed, sunlight resistant, photovoltaic wire rated 90C, 105C, 125C, or 150C dry and, 90C wet, 600, 1000, or 2000 V for interconnection wiring of grounded and ungrounded p
18、hotovoltaic power systems as described in Article 690, Part IV, Wiring Methods, and other applicable parts of the National Electrical Code (NEC), NFPA 70. 2 Units of Measurement 2.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate informatio
19、n 3 Undated References 3.1 Any undated reference to a code or standard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard 4 Glossary 4.1 For the purpose of this standard the following denitions apply. 4.2 COMPOSITE INSULATI
20、ON A multiple-layer system of materials that fullls the requirements for both electrical and mechanical integrity of the cable or wire. 4.3 CP A thermoset compound whose characteristic constituent is chlorosulfonated polyethylene. 4.4 CPE A thermoset compound whose characteristic constituent is chlo
21、rinated polyethylene. 4.5 EPCV A thermoset compound whose characteristic constituent is a co-vulcanizate of ethylene and propylene with polyethylene. 4.6 EP A thermoset compound whose characteristic constituent is a copolymer of ethylene and propylene, or a terpolymer of ethylene, propylene, and a s
22、mall amount of nonconjugated diene, or a blend of both. 4.7 NBR/PVC A thermoset compound whose characteristic constituents are acrylonitrile butadiene rubber and polyvinyl chloride. 4.8 NEOPRENE A thermoset compound whose characteristic constituent is polychloroprene. 4.9 PVC A thermoplastic compoun
23、d whose characteristic constituent is polyvinyl chloride or a copolymer of vinyl chloride and vinyl acetate. 4.10 THERMOPLASTIC A jacket material that repeatedly can be softened by heating and hardened by cooling through a temperature range characteristic of the material, and that in the softened st
24、ate can be shaped through the application of force. 4.11 THERMOSET An insulating or jacketing polymeric material which, when cross-linked, will not ow on subsequent heating. Cross-linking is accomplished either chemically or by irradiation. SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 4UL COPYRIGH
25、TED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.12 XL A thermoset compound whose characteristic constituent is cross-linked polyethylene, cross- linked polyvinyl chloride, cross-linked ethylene vinyl acetate, or blends thereof. XL FILLED An XL materi
26、al in which the mass fraction of carbon black and/or mineral llers is 10 percent or greater. XL UNFILLED An XL material in which the mass fraction of carbon black and/or mineral llers is less than 10 percent. CONSTRUCTION 5 General 5.1 Only materials that are acceptable for the particular use shall
27、be employed in a wire. Wires shall be made and nished with the degree of uniformity and grade of workmanship that are practicable in a well-equipped factory. 5.2 Each material used in a wire shall be compatible with all of the other materials used in the wire. 5.3 The wire shall consist of a single,
28、 insulated, stranded copper, or aluminum conductor, complying with the construction and materials requirements for Type RHW-2 in the Standard for Thermoset-Insulated Wires and Cables, UL 44, or for Type THW-2 in the Standard for Thermoplastic-Insulated Wires and Cables, UL 83, with the exceptions no
29、ted in Conductors, Section 6 and Insulation, Section 7. For wires rated greater than 90C, see 9.2. For assemblies of these single conductor wires see 8.1. 6 Conductors 6.1 General 6.1.1 A copper conductor shall not be smaller than 18 AWG and shall not be larger than 2000 kcmil. An aluminum or copper
30、-clad aluminum conductor shall not be smaller than 12 AWG and shall not be larger than 2000 kcmil. Only stranded conductors of copper, copper-clad aluminum, or an acceptable aluminum alloy shall be used in a wire. Conductors shall consist of materials complying with the: a) Standard Specication for
31、Soft or Annealed Copper Wire, ASTM B3, b) Standard Specication for Concentric-Lay-Stranded Copper Conductors, Hard, Medium- Hard, or Soft, ASTM B8, c) Standard Specication for Tin-Coated Soft or Annealed Copper Wire for Electrical Purposes, ASTM B33, d) Standard Specication for Rope-Lay-Stranded Cop
32、per Conductors Having Bunch-Stranded Members, for Electrical Conductors, ASTM B172, e) Standard Specication for Rope-Lay-Stranded Copper Conductors Having Concentric- Stranded Members, for Electrical Conductors, ASTM B173, f) Standard Specication for Bunch-Stranded Copper Conductors for Electrical C
33、onductors, ASTM B174, g) Standard Specication for Silver-Coated Soft or Annealed Copper Wire, ASTM B298, SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL h) Standard Specication for Nickel-Coate
34、d Soft or Annealed Copper Wire, ASTM B355, i) Standard Specication for 8000 Series Aluminum Alloy Wire for Electrical Purposes-Annealed and Intermediate Tempers, ASTM B800, j) Standard Specication for Concentric-Lay-Stranded Conductors of 8000 Series Aluminum Alloy for Subsequent Covering or Insulat
35、ion, ASTM B801, k) Standard Specication for Compact Round Stranded Copper Conductors Using Single Input Wire Construction, ASTM B835, l) Standard Specication for Compact Round Stranded Aluminum Conductors Using Single Input Wire Construction, ASTM B836, m) Standard Specication for Compressed Round S
36、tranded Aluminum Conductors Using Single Input Wire Construction, ASTM B901, n) Standard Specication for Compressed Round Stranded Copper Conductors, Hard, Medium- Hard, or Soft Using Single Input Wire Construction, ASTM B902, o) Standard Specication for 19 Wire Combination Unilay-Stranded Aluminum
37、Conductors for Subsequent Insulation, ASTM B786/B786M. p) Standard Specication for 19 Wire Combination Unilay-Stranded Copper Conductors for Subsequent Insulation, ASTM B787/B787M, q) Requirements for Copper-Clad Aluminum Conductors in the Reference Standard for Electrical Wires, Cables, and Flexibl
38、e Cords, UL 1581. 6.1.1 effective September 30, 2015 6.1.2 An aluminum conductor shall be of aluminum conductor material (ACM), AA 8000 series alloy. Copper-clad aluminum conductors shall comply with the Requirements for Copper-Clad Aluminum Conductors in the Reference Standard for Electrical Wires,
39、 Cables, and Flexible Cords, UL 1581. 6.1.2 effective September 30, 2015 6.1.3 An 18 or 16 AWG copper conductor shall comply with the requirements for stranded xture wire conductors in the Standard for Fixture Wire, UL 66 and shall employ a minimum of 7 strands. All other conductors shall comply wit
40、h the requirements in the Standard for Thermoset-Insulated Wires and Cables, UL 44, or in the Standard for Thermoplastic-Insulated Wires and Cables, UL 83, except as modied in this Section. 6.1.4 Metric conductors in accordance with Conductors of insulated cables, IEC 60228, Class 2, 5, or 6 may be
41、used instead of AWG sized conductors described in the Standard for Thermoset-Insulated Wires and Cables, UL 44, or in the Standard for Thermoplastic-Insulated Wires and Cables, UL 83. The size of these metric conductors shall be between 0.823 and 1013 mm 2 . The next largest AWG size shall be used t
42、o determine the insulation and/or jacket thickness. SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6.1.5 Refer to the table Conductor metal specications in the Standard for Appliance Wiring Ma
43、terial, UL 758, for the temperature limitations of the conductor material used. 7 Insulation 7.1 Thermoplastic Insulation (90C Dry and Wet, 600 Volts) 7.1.1 The insulation shall be PVC that complies with the requirements for Type THW-2 as specied in the Standard for Thermoplastic-Insulated Wires and
44、 Cables, UL 83. 7.1.2 A thermoplastic insulation that is of a material generically different from PVC (new material), or that is a PVC material that does not comply with the short-term physical properties tests for Type THW-2 PVC insulation, shall be evaluated for the requested temperature rating as
45、 described in the Dry temperature rating of new materials (long-term aging test), in the Standard for Wire and Cable Test Methods, UL 2556. Investigation of the electrical, mechanical, and physical characteristics of the wire using the material shall show the material to be comparable in the perform
46、ance to the Type THW-2 PVC insulation. The investigation shall include tests such as crushing, impact, abrasion, deformation, heat shock, insulation resistance, and dielectric voltage withstand. 7.1.3 The average and minimum thickness of a thermoplastic insulation shall be as shown in Table 7.1. The
47、 method of preparing specimens, taking the measurements, and determining compliance shall be as specied in the Standard for Thermoplastic-Insulated Wires and Cables, UL 83. Table 7.1 Minimum acceptable thicknesses of integral thermoplastic insulation and jacket Conductor size(s) Minimum average Mini
48、mum at any point Copper Aluminum or copper-clad aluminum mils (mm) mils (mm) 18 10 AWG 12 10 AWG 75 (1.90) 68 (1.73) 8 2 8 2 95 (2.41) 86 (2.18) 1 4/0 1 4/0 110 (2.79) 99 (2.51) 250 500 kcmil 250 500 kcmil 125 (3.18) 112 (2.84) 550 1000 550 1000 140 (3.56) 126 (3.20) 1100 2000 1100 2000 170 (4.32) 1
49、53 (3.89) 7.2 Thermoset insulation and jacket (90, 105, 125, or 150C dry and 90C wet, 600, 1000, or 2000 volts) 7.2.1 The insulation and jacket materials shall be as shown in Table 7.2. A jacket may be thermoplastic if it complies with the requirements noted in 7.2.3. SEPTEMBER 30, 2014 PHOTOVOLTAIC WIRE - UL 4703 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Table 7.2 Insulation and
