UL 2703-2015 UL Standard for Safety Mounting Systems Mounting Devices Clamping Retention Devices And Ground Lugs For Use With Flat-Plate Photovoltaic Modules And Panels (First Edit_1.pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 2703 Mounting Systems, Mounting Devices, Clamping/ Retention Devices, and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and PanelsUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHE

2、R REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Ground Lugs for Use with Flat-Plate Photo

3、voltaic Modules and Panels, UL 2703 First Edition, Dated January 28, 2015 SUMMARY OF TOPICS This is the Publication of the ANSI-Approved First Edition of the Standard for Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and

4、Panels, UL 2703, which covers rack mounting systems and clamping devices for at-plate photovoltaic modules and panels that comply with the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703, intended for installation on or integral with buildings, or to be freestanding (i.e., not attac

5、hed to buildings), in accordance with the National Electrical Code, ANSI/NFPA 70 and Model Building Codes. The new requirements are substantially in accordance with Proposal(s) on this subject dated September 26, 2014. All rights reserved. No part of this publication may be reproduced, stored in a r

6、etrieval 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 implied, including but not limited to, the implied warranties of me

7、rchantability 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 the use of or the inability to use this Standard, even if UL or an a

8、uthorized 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 versions of ULs Standards for Safety agree to defend, indemnify, a

9、nd 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 the purchasers computer system. The requirements in this Standard

10、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 have been revised and that have a future effective date are located

11、after the Standard, and are preceded by a SUPERSEDED REQUIREMENTS notice. The following table lists the future effective dates with the corresponding item. JANUARY 28, 2015 UL 2703 tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Future Ef

12、fective Date References July 28, 2016 Entire Standard JANUARY 28, 2015 UL 2703 tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 28, 2015 1 UL 2703 Standard for Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Gro

13、und Lugs for Use with Flat-Plate Photovoltaic Modules and Panels First Edition January 28, 2015 This ANSI/UL Standard for Safety consists of the First Edition. The most recent designation of ANSI/UL 2703 as an American National Standard (ANSI) occurred on January 28, 2015. ANSI approval for a standa

14、rd does not include 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 Developmen

15、t System (CSDS) at 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. C

16、OPYRIGHT 2015 UNDERWRITERS LABORATORIES INC. ANSI/UL 2703-2015UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 28, 2015 UL 2703 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITH

17、OUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Glossary .6 3 Units of measurement 10 4 Components 10 5 Undated References .11 CONSTRUCTION 6 General .11 7 Polymeric Materials 18 8 Grounding and Grounding Devices .19 9 Bonding 20 10 Corrosion Resistance .22 11 Fire Resistance .24 PERFORMAN

18、CE 12 General 24 13 Bonding Path Resistance Test .25 14 Terminal Torque Test .25 15 Fire Performance .26 16 Accelerated Aging Test 26 17 Temperature Cycling Test .28 18 Humidity Test 30 19 Corrosive Atmosphere Tests .32 19.1 Salt spray test .32 19.2 Moist carbon dioxide/sulphur dioxide test 33 20 Me

19、tallic Coating Thickness Test 34 21 Mechanical Loading Test 35 22 Bonding Conductor Test .38 23 Bonding Strap Pull Test (Only for at bonding straps with at end terminations/crimps) .39 RATINGS 24 Details .40 MARKINGS 25 Details .40 INSTRUCTIONS 26 Installation, Assembly and Maintenance/Inspection In

20、structions .41 APPENDIX A Standards for ComponentsA1 JANUARY 28, 2015 UL 2703 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX B Retest Guidelines(Informative) JANUARY 28, 2015 UL 2703 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FUR

21、THER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope Added 1 effective July 28, 2016 1.1 These requirements cover rack mounting systems, mounting grounding/bonding components, and clamping/retention devices for specic (manufacturer/model designation) at-plate photovoltai

22、c modules and panels that comply with the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703, intended for installation on or integral with buildings, or to be freestanding (i.e., not attached to buildings), in accordance with the National Electrical Code, ANSI/NFPA 70 and Model Buildi

23、ng Codes. Systems, components and/or devices evaluated under this standard may be used to ground and/or mount a PV module complying with UL 1703 when the specic module or frame has been evaluated for bonding/grounding or the module has been evaluated for mounting with the evaluated system, component

24、 or device. 1.2 These requirements cover rack mounting systems and clamping devices intended for use with photovoltaic module systems with a maximum system voltage of 1000 V. 1.3 These requirements cover rack mounting systems, clamping, retention devices pertaining to ground/bonding paths, mechanica

25、l strength, and suitability of materials only. 1.4 These requirements do not cover: a) Equipment intended to accept the electrical output from the array, such as power conditioning units (inverters) and batteries. b) Solar trackers or tracker mechanisms (except as specically directed as to be utiliz

26、ed by the Outline of Investigation for Solar Trackers, UL 3703 and in combination with UL 3703). c) Cell assemblies intended to operate under concentrated sunlight. d) Optical concentrators. e) Combination photovoltaic-thermal modules or panels. f) Equipment intended to carry current as a normal fun

27、ction of that component, such as combiner boxes, connection boxes (other than connection box for grounding), wireways and enclosures housing live parts. See the Standard for Flat-Plate Photovoltaic Modules and Panels, UL 1703 or the Standard for Inverters, Converters, Controllers and Interconnection

28、 System Equipment for Use With Distributed Energy Resources, UL 1741. g) Ground rods and ground rod accessories. h) The mechanical and structural requirements of the international building code. Note: The IBC and other model codes may have additional requirements. As an example, compliance with the

29、IBC will require development load combinations which include dead, snow, wind and seismic forces using ASCE 7. These loads will need to be applied in three orthogonal directions and the load resisting elements of the system will be required to adequately support the applied loads. JANUARY 28, 2015 U

30、L 2703 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2 Glossary Added 2 effective July 28, 2016 2.1 For the purpose of this standard, the following denitions apply. 2.2 ACCESSIBLE A part is considered accessible if, in a fully assembled r

31、ack mounting system (that is, with all covers in place) the part may be touched by the probe illustrated in Figure 2.1. A cover that may be removed without the use of a tool is to be removed for purposes of this requirement. A cover that may be removed (with or without a tool) for routine maintenanc

32、e such as cleaning, or to gain access to tools, is to be removed for purposes of this requirement. The probe illustrated in Figure 2.1 shall be applied to up to any depth that the opening will permit, up to a maximum of 35 inches; and shall be rotated or angled before, during, and after insertion th

33、rough the opening to any position that is necessary to examine the product. The probe shall be applied in any possible conguration; and, if necessary, the conguration shall be changed after insertion through the opening. The probe is to be used as a measuring instrument to judge the accessibility pr

34、ovided by an opening, and not as an instrument to judge the strength of a material; as such, it is to be applied with the minimum force necessary to accurately determine accessibility. This is generated text for gtxt. 2.3 AC MODULE The smallest complete unit that includes solar cells, optics, invert

35、ers, and other components, excluding tracking devices, intended to generate ac power from sunlight. 2.4 ABOVE ROOF MOUNTING (including rack-mounted style installations) Installations that are spaced away from the buildings roof member. Figure 2.1 Probe for determining accessibility of live parts JAN

36、UARY 28, 2015 UL 2703 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.5 ARRAY A mechanically-integrated assembly of modules or panels with a support structure and foundation, tracking, thermal control, and other components, if used, to fo

37、rm a power-producing unit. 2.6 BOLT A type of fastener. For the purposes of this document the requirements for “cap screws” will apply to bolts as well. See cap screw, 2.11. 2.7 BONDING Electrically connecting all metal components to the point of the equipment ground conductor. 2.8 BONDING DEVICE A

38、device for bonding and may include a function to pierce non-conductive coatings such as but not limited to; anodization, paint, vitreous enamel, and may be a separate piercing device or integral to the component to perform the bonding function. 2.9 BONDING STRAP A solid, multi-strand or braided copp

39、er, copper-clad aluminum or aluminum conductor (and may be tin or zinc plated) with factory crimped terminations to allow bonding of components. 2.10 CELL The basic photovoltaic device that generates electricity when exposed to sunlight. 2.11 CAP SCREW A threaded fastener which is utilized with a th

40、readed nut or internal threads in a material, to provide a clamp load on the mechanical joint being fastened. Cap screws are most typically hex head, but include socket head, button head, and other types. See ASTM F593, ASTM F837, and for illustrations of these and other types of cap screws, see ANS

41、I/ASME B18.2.1 and ANSI/ASME B18.3. 2.12 CLAMP LOAD The force exerted on a fastened joint by a fastener, such as a cap screw. To minimize fatigue failures, the clamp load of a fastener, such as a cap screw and hex nut, must exceed the force exerted on the fastener by the fastened joint. 2.13 CLAMPIN

42、G DEVICE(S) A mechanical means to secure a PV module to the rack mounting system which does not rely upon the mounting holes in the PV modules frame. These clamping devices are typically, but not limited to, top-down clamps. The clamping device may also function as a bonding device where specied. To

43、p down end-clamps are assumed to be cantilever design, where the fastener securement is approximately at the mid-point between the PV module and the clamps contact with the supporting structure. Also see Retention Device. 2.14 CYCLIC LOADING The non-static (changing) forces that act upon a body; for

44、 the purposes of this standard, the changing loads that act upon the fastened joint (i.e., changing wind loads that will force a PV module to act against the clamping device which is securing the PV module in place). 2.15 DIRECT ROOF MOUNTING PV modules which are direct-mounted; placed upon the buil

45、dings waterproof membrane/shingles or the like. 2.16 ELECTRIC SHOCK A risk of electric shock is considered to exist at a part if the potential between the part and earth ground or any other accessible part is more than 30 Vdc and the leakage current exceeds the values specied in the following table:

46、 JANUARY 28, 2015 UL 2703 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL Surface or part from which measurement is made Maximum current (dc) Accessible conductive frame, pan, or the like 10 A 2.17 FACTORY INSTALLED The connection of a devi

47、ce under controlled factory conditions at the manufacturers location(s). 2.18 FASTENER (threaded fastener) A mechanical device designed specically to hold, join, couple, or assemble two or more components together. Examples of fastener types include cap screws, machine screws, and bolts. 2.19 FIELD

48、INSTALLED The connection of a device, which is made in the eld by an installer. 2.20 GROUNDING LUG A device used to provide a ground path between an object (e.g., PV module frame or racking system) and a grounding electrode conductor or equipment grounding conductor; the device provides an equipoten

49、tial-bonded connection. 2.21 INTERCONNECT A conductor within a module that provides a mechanism for conducting electricity between cells. 2.22 LIKELY TO BE ENERGIZED Any conductive component that may come into contact with a live part under normal operating or single fault conditions. Conductive components of rack mounting systems that enclose electrical circuits or otherwise act as an electrical enclosure, conductive components that are not physically separated from potenti