UL 2703-2021 pdf download – Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and Panels.
25 Details 25.1 Each component or subassembly of a rack mounting system shall have a plain, legible, permanent marking that is molded, die-stamped, paint-stenciled, stamped, or etched metal that is permanently secured, or indelibly stamped on a pressure-sensitive label secured by adhesive that complies with the Standard for Marking and Labeling Systems, UL 969. Ordinary usage, handling, storage, and the like of the component or subassembly shall be considered in determining whether a marking is permanent. The marking shall include: a) The manufacturer’s name, trademark, or other descriptive marking by which the organization responsible for the product can be identified; b) The model number or the equivalent; c) The date or other dating period of manufacture not exceeding any three consecutive months. d) A factory code indicating its place of manufacture. Exception No. 1: The manufacturer’s identification may be in a traceable code ifthe product is identified bythe brand ortrademarkowned bya private labeler. Exception No. 2: The date of manufacture may be abbreviated; or may be in a nationally accepted conventional code orin a code affirmed bythe manufacturer, provided that the code a) Does not repeat in less than 10 years; and b) Does not require reference to the production records ofthe manufacturerto determine when the product was manufactured. Exception No. 3: Alternatively, the markings are permitted to be on the smallest unit packaging. Exception No. 4: No markings are required on commonly available hardware (such as screws, bolts, or washers). 25.2 Deleted 25.3 Deleted 25.4 Deleted 25.5 Deleted
26.2 The installation instructions shall include a detailed description of the grounding method, where applicable, to be used in accordance with the National Electrical Code, ANSI/NFPA 70. The instructions provided for the installation of grounding and bonding devices shall not result in an installation violating the instructions and labels relating to grounding and bonding for a PV module meeting the requirements of UL 1703 or UL 61730-1, whichever applies. This description shall include: a) The size, type, and temperature rating of the conductors to be used, and b) The specific grounding devices and hardware (such as nuts, bolts, star washers, spilt-ring lock washers, flat washers, or bonding devices) that are used to attach a grounding/bonding device that complies with this standard, and c) A representative diagram to illustrate the minimum ground path, with each point of a grounding or bonding connection clearly identified. 26.3 The installation instructions for rack mounting systems intended for installation on a roof shall include: a) A statement indicating the method to install the rack mounting system to the roof, b) A statement that the rack mounting system is to be installed over a fire resistant roof covering rated for the application, and c) The PV module(s) or type(s) of PV module(s) and PV rack mounting installation configurations necessary to comply with the Fire Class Rating of the PV system evaluated in accordance with Fire Performance, Section 15. Exception: The installation instructions forPVrack mounting systems that have not been evaluated for a system fire class rating in accordance with Fire Performance, Section 15, shall include the statement “Not Fire Rated.” 26.4 The instructions shall include the following direction for continued maintenance by qualified persons: a) The statement “Any loose components or fasteners shall be re-tightened in accordance with these instructions”, or the equivalent.