There is no question that the National Electrical Code (NEC) is far and away the No. 1 most important topic to EC&M readers. And every three years — when a new Code cycle comes along — we team up with longstanding NEC Consultant Mike Holt to present the key changes made during that particular revision cycle. In order to make these comprehensive changes more manageable and easier to digest, the EC&M staff has created this gallery, summarizing the most important revisions to the 2014 NEC that affect the largest number of our readers.
This group of 20 key changes focuses on the topics of selective coordination, field markings, dedicated spaces, multiwire branch circuits, GFCI and AFCI protection, conductor sizing, lighting load calculations, building disconnects, grounding electrodes, conductor ampacity, raceway supports, switch connections, grounding and bonding transformers, receptacles and plugs in hazardous locations, wiring methods in special occupancies, disconnects for sign lighting, wiring for spas and hot tubs, and emergency illumination requirements.
Scroll through the photo gallery for short summaries of each change. Or, for more in-depth analysis, click on the blue text link provided in the corresponding box to the right of each image.
Editor’s Note: The information presented in this gallery is based on Mike Holt's full 2014 National Electrical Code Changes article, which was first published in the November 2013 issue of the print magazine.