John Wiles gets dozens of questions a week on PV systems and the National Electrical Code® (NEC®) from PV vendor/installers, PV manufacturers, PV systems integrators, electrical contractors, electricians, electrical inspectors, and homeowners. Many of these questions are repetitive. John uses these questions as the basis for his Code Corner articles in Home Power Magazine. Rather than rewrite the answers to the frequently asked questions, John has indexed the Code Corner articles (right column).  Each one is linked to the appropriate PDF file.

The higher the number of the Home Power edition, the more recent the publication date.   The articles cover the requirements of the 1990, 1993, 1996, and 1999 editions of the National Electrical Code.  This material represents the best available information at the time of publication (starting as early as 1990).  It should only be used with a full understanding of the NEC which is available from local electrical supply houses and the National Fire Protection Association.   Better information on good engineering practices and good workmanship appear in the later Code Corner articles.