Ground-Fault Protection
A safety system that detects unintended current flow to ground (often through damaged wiring or insulation) and disconnects the circuit to prevent fire or electrocution.
Why It Matters
Ground faults in solar systems can cause fires if undetected. Modern inverters include sophisticated ground-fault detection. NEC 690.5 requires ground-fault protection on all PV systems.
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.
Inverter
A device that converts direct current (DC) electricity from solar panels into alternating current (AC) electricity used by your home.
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.