David Herres David Herres (Clarksville, NH) is the owner and operator of a residential and commercial construction company. He obtained a Journeyman Electrician’s License in 1975, and has certificates in welding and wetland delineation, along with experience ith elevators. Beginning in 2001, Mr. Herres has focused primarily on electrical work, upgrading his license to Master status. The author of a 2006 article for Electrical, Construction, and Maintenance on complimentary wiring methods, he has written nearly 70 articles on electrical and telecom wiring. Herres is the author of 2 books for McGraw-Hill: The 2011 National Electrical Code: Chapter-by-Chapter (August, 2011), and Troubleshooting and Repairing Commercial Electrical Equipment, to be published in July, 2013. Read More Read Less