Note: The requirements outlined in this article are based on the 2011 edition of the NEC. Article 690, which consists of nine parts, provides electrical requirements for photovoltaic (PV) systems.
Article 690 covers solar installations, except large-scale ones (those are covered in Article 691) [Sec. 690.1], as shown in Fig. 1. There are three important definitions: “Photovoltaic (PV) system” ...
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