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snapnrack.com Certiﬁcation Details SnapNrack Ultra Rail system has been evaluated by Underwriters Laboratories (UL) and Listed to UL/ANSI Standard 2703 for Grounding/Bonding, Mechanical Loading, and Fire Classiﬁcation. The Ultra Rail system has been designed in compliance with UL Standard 2703 Section 9.1 Exception, which permits accessible components that are not part of the fault current ground path to not be electrically bonded to the mounting system (e.g. roof attachments, array skirt, etc.). For more details on the integrated grounding functionality see the Grounding Speciﬁcations section. This racking system may be used to ground and/or mount a PV module complying with UL 1703 only when the speciﬁc module has been evaluated for grounding and/or mounting in compliance with the included instructions. See the Grounding Speciﬁcations for the list of modules tested with the Ultra Rail system for integrated grounding. Ground Lugs have been evaluated to both UL 467 and UL 2703 Listing requirements. Ultra Rail has been listed with a number of Module Level Power Electronic (MLPE) devices. A complete list can be found in the Grounding Speciﬁcations section. The mounting system Bonding Listing is only valid when installed with a Non-Separately Derived PV system. The PV system is required to have a direct electrical connection to another source, such as connecting to the grid via a grid interactive inverter. SnapNrack recommends that bare copper never come into contact with aluminum. Grounding/Bonding The Ultra Rail system is Listed for mechanical loading for diﬀerent load ratings depending on the mounting conﬁguration and PV module installed. For more details on the mechanical loading details see the Mechanical Loading Speciﬁcations section. SnapNrack engineered systems should only be used with SnapNrack components and hardware. Any application outside of those speciﬁed in this Installation Manual and the Structural Engineering Report may void the warranty and structural certiﬁcation could become invalid. If the module clamps have been engaged and need to be loosened and reengaged, SnapNrack recommends moving the module frame 3mm to engage the bonding pin in a new location. The UL Listing covers mechanical load ratings for the various span lengths, module orientations and positive, negative, and side load ratings. These values can be found in the Mechanical Loading Speciﬁcations section. SnapNrack recommends a periodic re-inspection of the completed installation for loose components, loose fasteners, and any corrosion, such that if found, the aﬀected components are to be immediately replaced. Mechanical Loading Fire The Ultra Rail system has been evaluated for a Class A System Fire Classiﬁcation for a Steep-Sloped Roof (≥ 2:12 pitch) using Type 1 and Type 2 modules. In order to maintain the System Classiﬁcation, modules are clamped to the mounting rails between 0 and 12 inches from the top and bottom edges of the module. The Ultra Rail system has been evaluated for a Class A System Fire Classiﬁcation for a Low-Sloped Roof (< 2:12 pitch) using Type 1 and Type 2 modules. In order to maintain the System Classiﬁcation, modules are clamped to the mounting rails be- tween 0 and 16.3 inches from the top and bottom edges of the module. The optional Array Skirt accessory has also been evaluated and the Ultra Rail system will maintain the Class A System Fire Classiﬁcation detailed above if installed with the Skirt. Because the system was tested at 5 inches above the test roof ﬁxture Ultra Rail can be installed without any height restric- tions and will maintain the Class A System Fire Classiﬁcation. See Rail Installation section for potential module-speciﬁc height restrictions due to module temperature. 941 W Alton Ave - 2017966906/27/23