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Stalking the Elusive and Somewhat Strange PV System

Even as PV sales and installations are booming (especially in states or regions providing financial incentives), PV systems are still relatively rare. While many...

Should They Be Grounded?

At first glance, the obvious answer is: Photovoltaic (PV) systems are no different from other electrical power systems, and of course they should be...

Single Conductor Exposed Cables! Not In My Jurisdiction!

So sayeth the inspector when faced with inspecting his or her first rooftop residential or commercial PV installation. Yes, PV systems have some unusual...

What Changed in Article 690?

Article 690, Solar Photovoltaic Power Systems, has been in the National Electrical Code (NEC) since 1984. An NFPA-appointed Task Group for Article 690 proposed...

Photovoltaic Power Systems and the NEC

Introduction Photovoltaic (PV) systems that generate electricity from sunlight are being installed in ever increasing numbers throughout the United States and the rest of the...
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