This article was posted 10/31/2006 and is most likely outdated.

Photovoltaic Power Systems and the 2005 National Electrical Code - Suggested Practices
 

 
Topic - NEC
Subject
- Photovoltaic Power Systems and the 2005 National Electrical Code - Suggested Practices

October 31, 2006  

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Photovoltaic Power Systems and the 2005 National Electrical Code

Suggested Practices

 

imageMany of the photovoltaic (PV) power systems in use and being installed today may not be in compliance with the NEC and other local codes. There are several contributing factors to this situation:

  • The PV industry has a strong “grass roots,” do-it-yourself faction that is not fully aware of the dangers associated with low-voltage and high-voltage, direct-current (dc) and alternating-current (ac) electrical power systems.
  • Electricians and electrical inspectors have not had significant experience with direct-current portions of the Code or PV power systems.
  • The electrical equipment industries do not advertise or widely distribute equipment suitable for dc use that meets NEC requirements.
  • Popular publications present information to the public that implies that PV systems are easily installed, modified, and maintained by untrained personnel.
  • Photovoltaic equipment manufacturers have, in some cases, been unable to afford the costs associated with testing and listing by approved testing laboratories like Underwriters Laboratories (UL), Canadian Standards Association (CSA) or ETL, Inc.
  • Photovoltaic installers and dealers in many cases have not had significant training or experience installing ac residential and/or commercial power systems.

 

Click here or on the image above to read the entire suggested practices for PV power systems manual article produced by John Wiles at the Southwest Technology Development Institute at New Mexico State University.

 

 

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Comments
  • H & H Solar Energy Services, a division of H & H Group located in Madison, WI, is currently the leading solar electric installer in the state of Wisconsin. The manager and lead installer in this department, Andrew Bangert, is a Master Electrician with over 110 photovoltaic installations to his credit. We have taken the forefront of this industry by providing outstanding service that not only follows all codes and regulations, but have made this knowledge available to inspectors and utilities who may not be familiar with this technology. The solar electric industry has experienced tremendous growth in recent years and technological changes are common and unending. I would highly encourage NEC to get more involved in the solar industry for the following reasons. We are one of very few union shops to be active in this market. We constantly compete with installers who use non union, under qualified installers. Andrew Bangert teaches courses on photovoltaics and DC power theory at Madison Area Technical college, and has been in the middle of the ongoing discussion regarding metering for solar power systems for We Energies in eastern Wisconsin. I would however, disagree with some of the statements about equipment suppliers. This industry is constantly working to get rid of the "black cloud" of the late seventies and early eighties. Equipment suppliers (Magnetek, SMA America, Kyocera, Outback power systems and many others) have worked very hard to make sure that equipment meets all electrical codes. Installers and suppliers are, for the most part, very concerned with delivering a reliable, safe product whose installation will promote further sales of renwable energy systems. If you have questions about this growing market, I encourage you to contact either myself, Chris Collins, Marketing Director, or Andrew Bangert, Manager, at H & H Solar Energy Services, 608-273-3434.

    Chris Collins

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