UL 2703-2019 pdf free download

UL 2703-2019 pdf free download.Mounting Systems, Mounting Devices, Clamping/Retention Devices, and Ground Lugs for Use with Flat-Plate Photovoltaic Modules and Panels.
minimum module or panel inclination specified in the installation instructions. The slope of the simulated roof deck shall be 0.5 in/ft (41.6 mm/rn).
15.1.7 A rack mounting system is not required to be usable after any of the tests in this section.
15.2 Spread-of-flame tests
15.2.1 The spread-of-flame tests are to be conducted oi the mounting system assembled with the intended PV modules or panels. Tests are to be conducted using the apparatus as described in the Standard Test Methods for Fire Tests of Roof Coverings, UL 790, and the tests modified as described in the following subsections. The tested mounting system will be exactly as it is assembled with the PV module according to its evaluation, with alternative designs that affect these test results tested separately according to the Retesting Guidelines in Appendix B. Parameters that are installed with variable settings will be tested with the worst-case condition except as described below.
a) Spread of Flame at Roof and Module or Panel Interface Over Representative Steep Sloped Roof. With the mounting system and the module or panel installed on a steep slope roof as an assembly and oriented such that the fire growth from the roof covering materials advances to the interstitial space below the module or panel and above the roof. The mounting system and the module or panel installation shall be installed with a minimum of 36 inches (910 mm) between the edge of the flame test apparatus and the edge of the PV mounting system. as defined by the PV module or a deflector in the direct flame path upon the test deck, whichever is closer to the leading edge of the test deck. The mounting system and the module or panel installation for steep sloped roofs shall be the measured baseline in accordance with 15.1.2 minus 12 inches (303 mm). Figure 152 illustrates how the baseline roof tests are used to establish the location of PV mounting system relative to the test flame. Figure 15.3 and Figure 15.4 illustrate where the test sample is to be located relative to the test flame, including application of deflector. The rating obtained for a 5- inch (127 mm) gap between the bottom of the module frame and the roof covering surface can be used for any other gaps allowed by the mounting instructions. This test is not required if the Installation Instructions require that the mounting system only be installed for slopes less than 2 inches/foot (167 mm/rn).
b) Spread of Flame at Roof and Module or Panel Interface Over Representative Low Sloped Roof. With the mounting system and the module or panel installed on a low slope roof as an assembly and oriented such that the fire growth from the roof covering materials advances to the interstitial space below the module or panel and above the roof For low sloped roofs, the mounting system and the module or panel installation shall be installed with a minimum of 36 inches (910 mm) between the edge of the flame test apparatus and the edge of the PV mounting system, as defined by the PV module or a deflector in the direct flame path upon the test deck, whichever is closer to the leading edge of the test deck. The mounting system and the module or panel installation for low sloped roofs shall be the measured baseline in accordance with 15.1.2 minus 12 inches (303 mm). UL 2703-2019 pdf free download.