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This nonmetallic box may have originally complied with the Code when it was first installed. Now, with the wood paneling installed over the gypsum wallboard, it’s a violation. Section 314.20 permits installations within or behind noncombustible surfaces such as gypsum wallboards to be set back from the finished surface a maximum depth of ¼ in. This same Code Section requires installations within a surface of wood paneling or other combustible materials to have the box, plaster ring, or box extender installed so it covers all the way to the surface of the wood paneling or combustible material. The installation could even project out beyond the surface of the wood paneling or combustible material. The installation, however, is not permitted to be recessed behind the wood paneling (as shown in this Photo). Any arcing or sparking within the box could allow the sparks to contact the combustible wood paneling, possibly resulting in a dangerous fire. Before installing this receptacle, a listed box extender should have been installed to make this installation Code compliant.
About the Author
Russ LeBlanc
Owner
Russ started in the electrical trade as an apprentice in 1985. He worked his way up to become a Journeyman Electrician and then eventually became a Master Electrician and Licensed Construction Supervisor. In 1999 Russ become an Electrical Instructor for The Peterson School of Engineering in Massachusetts where he developed his passion for teaching, and quickly became Department Head of Electrical Instruction. Russ has taught thousands of apprentices, electricians, engineers, inspectors, and other electrical professionals during his career as an instructor. He continues to provide electrical professionals with Electrical Code seminars, Arc-Flash Awareness training seminars and educational material through his LeBlanc Consulting Services in North Reading, MA whose specialty is educating electricians. He has been an active member of the NFPA Electrical Section and has authored hundreds of National Electrical Code proposals and comments which have become Code rules to improve the safety for the electrical industry. Russ is also an IAEI certified Electrical Inspector.
Please visit www.russleblanc.net for more information.