UL 3741 Certification to Meet NEC 690.12 Rapid Shutdown Compliance
CrossRail System with MiniRail Comp Components
& The South Face System
UL 3741 “PV Hazard Control” Certification Includes:
♦ Elimination of the requirement for module-level shutdown devices with MPLE for NEC 690.12 Rapid Shutdown Compliance
♦ System-level certification covering specified PV mounting components, modules, and inverters through physical testing
♦ Approved layouts per manufacturer installation instructions for specific PV array and sub-array designs, including placement requirements for string inverters and installation of String Isolation Devices (SDIs), where required
♦ No visibly exposed PV wires after module installation; wiring mounted to maintain separation from all metallic components using controlled air gaps
♦ Applicable to both residential and commercial PV arrays
CrossRail System; Rail based system for PV installations, fast and simple featuring pre-assembled universal bonding clamp | LEARN MORE
UL 3741 Certification
UL 3741 Installation Addendum
The South Face System; South facing ballasted system optimized for US market with optional anchoring | LEARN MORE
UL 3741 Certification
UL 3741 Installation Addendum
Understanding NEC 690.12 Rapid Shutdown Compliance
NEC 690.12 the National Electrical Code’s (NEC) Rapid Shutdown of PV Systems on Buildings, found in section 690.12. The PVHCS must be installed in accordance with the manufacturer’s installation instructions. NEC requires that specific PV circuits be controlled to reduce shock hazards to firefighter interactions. The code differentiates the requirements based on the circuit’s location in relation to the array boundary. The array boundary is defined as one foot in all directions from the array.
NEC defines the array as a mechanically and electrically integrated grouping of modules with support structure, including any attached system components such as inverter(s) or dc-to-dc converter(s) and attached associated wiring.
♦ Outside the array boundary, PV system circuit conductors shall be reduced to ≤ 30V within 30 seconds within rapid shutdown initiation
♦ Inside the array boundary, isolation devices shall be used to provide proper protection from shock hazards imposed on firefighters by system components within the array boundary
♦ Initiation devices shall initiate the rapid shutdown function of the PV system; these devices can be integrated with Power Conversion Systems (inverters) or be added separately
