National Electrical Installation Standards

Standards as High as Your Own

Wednesday, September 4, 2019


Good morning, I was doing some recent reading on running conduit (EMT) thru wood framing. My question relates to the practice of notching the studs and running the conduit horizontal to the framing and only protecting it at each framing member. Wouldn’t this be considered a violation since the raceway doesn’t maintain 1 1/4 back from the face of the framing. Wouldn’t the raceway/ conduit have to be protected the entire length of the run with a 1/16 inch steel plate if it wasn’t maintaining the setback?

- Tim P


Hey Tim thanks for your question. Notching wood framing members is allowed if it doesn't cause structural problems as stated in 300.4(A)(2). Building Codes have limits for how much can be notched. Cables and raceways must be protected by 1/16 inch steel plates - at those points, is also stated in 300.4(A)(2). So, the wiring method does not need to have protection against physical damage along the entire length. Additionally, steel plates are not required for EMT and some conduits as stated in 300.4(A)(2) Exception 1.

ABOUT CQD: NECA’s Code Question of the Day (CQD) is a leading National Electrical Code® forum for NECA and the industry. The CQD generates a lively dialogue and relative practical and Code-based responses to an ever-increasing and interactive audience.

IMPORTANT NOTICE: All answers are based on the latest edition of the National Electrical Code®, unless the question requests a response based on a specific edition. This correspondence is not a formal interpretation of the NEC®. Any responses expressed to the questions are opinions and do not necessarily represent the official position of NECA, NFPA, or any technical committee. In addition, this correspondence is neither intended, nor should it be relied upon, to provide professional consultation or services.

ABOUT CHARLIE: Charles M. Trout, better known as Charlie, was a nationally known NEC® expert and author. He served on several NEC® technical committees and is past chairman of CMP-12. In 2006 Charlie was awarded the prestigious Coggeshall Award for outstanding contributions to the electrical contracting industry, codes and standards development, and technical training. Charlie was also a member of NECA’s Academy of Electrical Contracting. Charlie’s experienced team of industry experts keep the CQD dialogue and discussions active and informative in the spirit of the man himself, as he wanted.

NECA STANDARDS: NECA publishes the National Electrical Installation Standards™ (NEIS™), a series of ANSI-approved performance and quality standards for electrical construction. Visit for more information. NEISÔ can be purchased in three formats: as paper books, on CD, or as electronic downloads.

NECA SAFETY PRODUCTS: NECA publishes valuable electrical safety books and CDs for the industry. Visit to view or purchase NECA safety products.

 CONTACT US: To submit a Code question, subscribe, or unsubscribe from this list, please e-mail: