Master Electrician Practice Exam 2026 – Comprehensive All-in-One Guide to Master Your Certification!

The required distance that wiring methods associated with solar photovoltaic (PV) systems must maintain from roof decking or sheathing is 10 inches. This requirement is established to prevent the overheating of wiring and to ensure proper ventilation of the roof components. By keeping wiring at this specified distance, it helps avoid potential damage, deterioration, or heat buildup that can cause insulation failure or other electrical hazards. The regulation is particularly important due to the unique scenarios presented by PV systems, where exposure to direct sunlight and varying environmental conditions can pose additional challenges. Adhering to this distance helps maintain safe operations and contributes to the overall reliability and safety of the electrical system in a solar installation.