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.

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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” ...

Power system users don't always have a clear idea of power system configurations that provide fault tolerance. As a result, users may specify a configuration beyond what's needed or intended, which ...

The module system introduced in Java 9 makes it easier to organize your code. Here’s a brief guide to working with modules in Java Until Java 9, Java’s top-level code organization element had been the ...

A monthly overview of things you need to know as an architect or aspiring architect. Unlock the full InfoQ experience by logging in! Stay updated with your favorite authors and topics, engage with ...