TechnicalUp to date · Jan 15, 2026
NEC (National Electrical Code)
The U.S. standard for electrical installation safety (NFPA 70). Article 690 specifically covers solar PV systems, including wiring, grounding, labeling, and rapid shutdown requirements.
Why It Matters
NEC requirements determine how your solar system is designed, installed, and inspected. Code updates (like 2017 rapid shutdown rules) can affect component choices and installation costs.
Related Topics
Related Terms
Rapid Shutdown
An NEC (National Electrical Code) safety requirement that solar systems must be able to reduce rooftop DC voltage to safe levels within 30 seconds of initiating shutdown, protecting firefighters and first responders.
Interconnection
The process of connecting your solar system to the utility grid, requiring utility approval and inspection.