Which type of systems does Article 690 apply to?

Article 690 of the National Electrical Code specifically addresses solar photovoltaic systems. This section establishes the requirements for the installation, interconnection, and safety considerations associated with photovoltaic technology, including aspects like wiring methods, overcurrent protection, and grounding, which are crucial for safeguarding both the installation and the personnel involved.

Solar photovoltaic systems capture sunlight and convert it into electricity, making them distinct from other renewable energy sources like wind, geothermal, and hydropower, each of which has its own regulations and guidelines under different articles in the NEC. Therefore, while Article 690 focuses solely on the requirements pertinent to solar technologies, other systems like wind energy, geothermal heating, and hydropower are covered under other relevant sections of the NEC, not Article 690.