NEC 2020 690.31 Wiring Methods
Article 690.31 (Wiring Methods) covers the permitted wiring methods for photovoltaic systems. It addresses conductor types and insulation, routing and support of PV source and output circuits, protection from physical damage, requirements for raceways and cable management, and separation from other wiring systems.
The section also includes provisions for rooftop installations, exposure to sunlight, and conditions of use to ensure durability, safety, and code-compliant installation of PV conductors.
