NEC 705 Interconnected Electric Power Production Sources
NEC Article 705 covers interconnected electric power production sources, including solar PV systems that operate in parallel with the utility grid. Its labeling requirements are intended to identify interconnected equipment, and provide warnings where multiple power sources may energize the system.
The article requires permanent labels at service equipment, disconnects, and distribution equipment to indicate backfeed conditions and interconnected power sources. These labels help installers, inspectors, and emergency responders safely operate, shut down, and service solar PV systems.
