UL 3730-2014 UL Standard for Safety Photovoltaic Junction Boxes (First Edition Reprint with Revisions Through and Including March 27 2017)《光伏接线盒的UL安全标准 (第一版》.pdf

《UL 3730-2014 UL Standard for Safety Photovoltaic Junction Boxes (First Edition Reprint with Revisions Through and Including March 27 2017)《光伏接线盒的UL安全标准 (第一版》.pdf》由会员分享，可在线阅读，更多相关《UL 3730-2014 UL Standard for Safety Photovoltaic Junction Boxes (First Edition Reprint with Revisions Through and Including March 27 2017)《光伏接线盒的UL安全标准 (第一版》.pdf（46页珍藏版）》请在麦多课文档分享上搜索。

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 3730 Photovoltaic Junction BoxesUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER R

2、EPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Photovoltaic Junction Boxes, UL 3730 First Edition, Dated November 11, 2014 Summary of Topics This is the Publication of the ANSI-Approved First Edition of the Standard for Photovoltaic Junction Boxes, UL 3730, which c

3、overs photovoltaic junction boxes intended to be attached to phovoltaic modules and panels. In addition, these requirements cover photovoltaic junction boxes intended for factory and eld wiring and may include conduit openings, wiring leads, and/or photovoltaic connectors intended for interconnectio

4、n of PV modules. The products covered by these requirements are intended to be installed in accordance with the National Electrical Code, ANSI/NFPA 70. The new requirements are substantially in accordance with Proposal(s) on this subject dated February 3, 2012 and September 12, 2014. All rights rese

5、rved. 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 UL. UL provides this Standard as is without warranty of any kind, either expressed or i

6、mplied, 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, including loss of prots, lost savings, loss of data, or any other damages arising out of th

7、e 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 paid for this Standard, regardless of the form of the claim. Users of the electronic

8、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 any error or deviation introduced while purchaser is storing an electronic Standard on

9、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 indicated in the note following the affected item. The prior text for requirements that ha

10、ve been revised and that have a future effective date are located after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. The following table lists the future effective dates with the corresponding item. NOVEMBER 11, 2014 UL 3730 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE

11、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Effective Date References Effective date to be determined Entire Standard NOVEMBER 11, 2014 UL 3730 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 11, 2014 1 UL 37

12、30 Standard for Photovoltaic Junction Boxes First Edition November 11, 2014 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 3730 as an American National Standard (ANSI) occurred on November 11, 2014. ANSI approval for a standard does not include

13、 the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions 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

14、http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should 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 UNDER

15、WRITERS LABORATORIES INC. ANSI/UL 3730-2014UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL NOVEMBER 11, 2014 PHOTOVOLTAIC JUNCTION BOXES - UL 3730 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTR

16、IBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 General 5 2.1 Components .5 2.2 Units of measurement .6 2.3 References 6 3 Glossary .6 CONSTRUCTION 4 Enclosure and Materials .7 4.1 General .7 4.2 Nonmetallic enclosures and polymeric materials 8 4.3 Openings for wiring system co

17、nnections 10 5 Protection Against Corrosion 11 6 Protection of Users - Accessibility of Uninsulated Live Parts 12 7 Wiring Terminals .12 8 Wiring Leads 14 9 Field Wiring Compartments .14 10 Grounding .14 11 Internal Bonding for Grounding .16 12 Internal Wiring 17 13 Protection of Wiring .18 14 Elect

18、rical Connections .18 15 Live Parts 19 16 Spacings 19 17 Barriers 20 18 Connectors 20 19 Printed-Wiring Boards .20 PERFORMANCE 20 General 21 21 Temperature Test .22 22 Dielectric Voltage-Withstand Test .23 23 Leakage Current Test .23 24 Mold Stress-Relief Distortion Test .24 25 Strain Relief Test .2

19、5 26 Crush Test .25 27 Push Test 26 28 Impact Test 26 29 Terminal Torque Test .27 30 Grounding Impedance Test 27 31 Bonding Conductor Test .27 32 Compression Test 28 33 Gasket Tests .29 33.1 General .29 33.2 Alternate gasket tests .30 34 Corrosive Atmosphere Test 31 NOVEMBER 11, 2014 PHOTOVOLTAIC JU

20、NCTION BOXES - UL 3730 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 34.1 Salt spray test .31 34.2 Moist carbon dioxide/sulphur dioxide test 32 35 Metallic Coating Thickness Test 33 36 Water Spray Test (Optional) .34 37 Wet Insulation-Res

21、istance Test (Optional) .35 38 Temperature Cycling Test (Optional) 35 39 Humidity Cycling Test (Optional) 36 RATING 40 Details .37 MARKING 41 Details .37 42 Installation and Assembly Instructions .38 APPENDIX A Standards for ComponentsA1 NOVEMBER 11, 2014 PHOTOVOLTAIC JUNCTION BOXES - UL 3730 4UL CO

22、PYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover photovoltaic junction boxes intended to be attached to photovoltaic modules and panels. 1.2 These requirements cover photovoltaic junction boxes int

23、ended for factory and eld wiring and may include conduit openings, wiring leads, and/or photovoltaic connectors intended for interconnection of PV modules. 1.3 The products covered by these requirements are intended to be installed in accordance with the National Electrical Code, ANSI/NFPA 70. 2 Gen

24、eral 2.1 Components 2.1.1 Except as indicated in 2.1.2, a component of a product covered by this standard shall comply with the requirements for that component. See Appendix A for a list of standards covering components generally used in the products covered by this standard. 2.1.2 A component is no

25、t required to comply with a specic requirement that: a) Involves a feature or characteristic not required in the application of the component in the product covered by this standard, or b) Is superseded by a requirement in this standard. 2.1.3 A component shall be used in accordance with its rating

26、established for the intended conditions of use. 2.1.4 Specic components are incomplete in construction features or restricted in performance capabilities. Such components are intended for use only under limited conditions, such as certain temperatures not exceeding specied limits, and shall be used

27、only under those specic conditions. NOVEMBER 11, 2014 PHOTOVOLTAIC JUNCTION BOXES - UL 3730 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.2 Units of measurement 2.2.1 Values stated without parentheses are the requirement. Values in pare

28、ntheses are explanatory or approximate information. 2.3 References 2.3.1 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. 3 Glossary 3.1 In the text of this standard, the term

29、unit refers to any product covered by this standard. For the purpose of this standard, the denitions in 3.2 3.18 apply. 3.2 AC MODULE The smallest complete unit that includes solar cells, optics, inverters, and other components, excluding tracking devices, intended to generate ac power from sunlight

30、. 3.3 BARRIER A part inside an enclosure that reduces access to a part that involves a risk of re, electric shock, injury to persons, or electrical energy-high current levels. 3.4 ELECTRIC SHOCK - VOLTAGE A live part does not involve a risk of electric shock when the maximum voltage of the part to g

31、round does not exceed 30 Vdc. 3.5 ENCLOSURE A surrounding case constructed to provide a degree of protection against: a) The accessibility of a part that potentially involves a risk of re, electric shock or injury to persons, or b) The risk of propagation of ame, sparks, and molten metal initiated b

32、y an electrical disturbance occurring within. 3.6 FIELD-WIRING LEAD A lead to which a supply, load, or other wire is intended to be connected by an installer. 3.7 FIELD-WIRING TERMINAL A terminal to which a supply, load, or other wire is intended to be connected by an installer. 3.8 FIXED UNIT A uni

33、t that is intended to be permanently connected mechanically and electrically and only able to be detached by the use of a tool. 3.9 GROUNDED CONDUCTOR A system or circuit conductor that is intentionally grounded. 3.10 KNOCKOUT A portion of the wall of an enclosure so fashioned that it is capable of

34、being readily removed by a hammer, screwdriver, and pliers at the time of installation in order to provide an opening or hole for the attachment of an auxiliary device, raceway, cable, or tting. 3.11 LIVE PART An electrically conductive part within a unit that during intended use has a potential dif

35、ference with respect to earth ground. 3.12 MAXIMUM SYSTEM VOLTAGE The sum of the open-circuit voltage (Voc) of the photovoltaic module or panel multiplied by the temperature correction factor specied in Article 690.7 of the National Electrical Code, ANSI/NFPA 70 for the maximum number of crystalline

36、 and multi-crystalline silicon NOVEMBER 11, 2014 PHOTOVOLTAIC JUNCTION BOXES - UL 3730 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL photovoltaic modules and panels in a series string. The maximum system voltage is equal to the sum of the

37、 Voc for the maximum number of amorphous silicon and thin lm photovoltaic modules and panels in a series string. 3.13 OPEN-CIRCUIT VOLTAGE (Voc) The maximum no load output voltage of a photovoltaic module or panel at standard test conditions (STC). 3.14 PERMANENTLY CONNECTED UNIT A unit connected to

38、 the electrical supply by means other than a supply cord and an attachment plug. 3.15 PRESSURE TERMINAL CONNECTOR A terminal that accomplishes the connection of one or more conductors by means of pressure without the use of solder. Examples of pressure terminal connectors are: a) Barrel and setscrew

39、 type, b) Crimp-type barrel, or c) Clamping plate and screw type. 3.16 SERVICE PERSONNEL Trained persons having familiarity with the construction and operation of the equipment and the risks involved. 3.17 STANDARD TEST CONDITIONS (STC) Test conditions consisting of: a) 100 mW/cm 2 irradiance, b) AM

40、 1.5 spectrum, and c) 25C (77F) cell temperature. 3.18 TOOL A screwdriver, coin, key, or any other object that is usable to operate a screw, latch, or similar fastening means. CONSTRUCTION 4 Enclosure and Materials 4.1 General 4.1.1 Photovoltaic junction boxes shall be considered an enclosure or be

41、provided with an enclosure that houses all current-carrying parts. The enclosure shall protect the various parts of the unit against mechanical damage from forces external to the unit. The parts of the enclosure that are required to be in place to comply with the requirements to reduce the risk of r

42、e, electric shock, injury to persons shall comply with the applicable enclosure requirements specied in this standard. NOVEMBER 11, 2014 PHOTOVOLTAIC JUNCTION BOXES - UL 3730 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4.1.2 The frame o

43、r chassis of a junction box shall not be relied upon to carry current during normal operation. 4.1.3 A part, such as a nameplate that is a part of the enclosure shall comply with the enclosure requirements. 4.1.4 Sheet-metal screws threading directly into metal shall not be used to attach a cover, d

44、oor, or other part that is to be removed to install eld wiring or for operation of the equipment. Machine screws, self-tapping machine screws, and thread forming screws are able to thread directly into sheet-metal when they allow for at least two full threads of screw engagement. 4.1.5 Sheet-metal s

45、crews mounting internal components that are not removed for installation or operation are able to thread directly into metal. 4.2 Nonmetallic enclosures and polymeric materials 4.2.1 A polymeric enclosure or polymeric part of an enclosure shall comply with Sections 7 and 34 in the Standard for Flat-

46、Plate Photovoltaic Modules and Panes, UL 1703, except as noted by the following. 4.2.2 With reference to paragraph 7.2 (c) of the Standard for Flat-Plate Photovoltaic Modules and Panes, UL 1703, a polymeric material serving as the support or insulation of a live part as dened in Table 6.1 of the Sta

47、ndard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C, shall have a Comparative Tracking Index performance level category (PLC) as determined in accordance with the Standard for Polymeric Materials - Short Term Property Evaluations, UL 746A, and as dened in Table 4.1, when t

48、he system voltage rating is 600 V or less. Exception No. 1: The CTI rating is not required for a polymeric material serving as the support or insulation of a live part as dened in UL 746C, Table 6.1, when both the material and live part are completely encapsulated by the potting material such that t

49、here is no surface upon which tracking may occur, and the potting material has been evaluated according to UL 746C, Table 6.1, for Electric Strength, Resistance to Electrical Ignition Sources (HAI and HWI), and Thermal Endurance. Exception No. 2: The CTI rating is not required for a polymeric material serving as the support or insulation of a live part as dened in UL 746C, Table 6.1, when both the material and live part are completely coated by a conformal coating that has b