Recently, UL in conjunction with several North Central Texas inspection authorities held a one-day training session on photovoltaic and supporting emerging technologies, including panel discussions on electrical requirement. As more of these training sessions are conducted around the country, UL should consider including as a handout, the newly posted NEMA Engineering Bulletin 103, Photovoltaic Wiring Methods.

This Bulletin offers a concise summary of Article 690 wiring methods permitted as alternatives to the general wiring methods in NEC® Chapters 1 through 4. The need for electrical installer education is continual given the changes in the Code and the introduction of new technologies. Engineering Bulletin 103 provides an effective update on wiring options for the growing PV landscape.


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