What's Wrong Here?

What’s Wrong Here? Hint: A Not-So-Weatherproof Outdoor Panel

Sept. 14, 2023

Think you know how this installation violates the NEC?

Hint: A not-so-weatherproof outdoor panel

panelboard enclosure installed in an outdoor wet location

This panelboard enclosure is installed in an outdoor wet location, yet the enclosure is designed only for use in dry locations. It is not a weatherproof enclosure as required by Sec. 312.2. Section 312.2 also requires surface mounted cabinets in wet locations to be placed or equipped to prevent water or moisture from entering and accumulating in the enclosure. This metal cabinet is also required to be installed with at least 1/4-in. of air space between it and the mounting surface. Table 110.28 provides information for selecting the correct type of enclosures for specific locations. Another problem here is the incorrect use of a LFMC connector for connecting ENT to the cabinet. This is a violation of Sec. 110.3(B) and Sec. 300.15 as this connector is not designed and listed for use with this wiring method. Lastly, ENT should not be used in this sun-drenched location unless it is identified as being sunlight resistant as specified in Sec. 362.12(7).

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.