NEC Code Basics

The Ins and Outs of Interconnected Electric Power Production Sources

You must plan carefully before connecting electric power sources to operate in parallel with a primary source.

Article 705 covers the connection of electric power sources that operate in parallel with a primary source. Typically, the primary source is the electric utility, but it can be an on-site source instead. To understand the requirements of Art. 705, you must be familiar with key terms it uses (see Definitions sidebar below).

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