Electrical metallic tubing - steel conduit

Code Quiz: EMT Mounting Requirements

March 14, 2019

Check your knowledge of conduit support requirements near a box.

Question: Electrical metallic tubing (EMT) shall be securely fastened in place within a maximum of _____ feet from a box.

A. three

B. five

C. six

D. eight

See the answer below.

Answer: Three

Explanation: Section 358.30(A) requires electrical metallic tubing (EMT) to be securely fastened within three feet of a box. Exception No. 1 permits this distance to be increased to five feet for unbroken lengths where structural members do not readily permit fastening within three feet.

Lupacchino is a senior design engineer with Gaylor Electric, Inc. in Noblesville, Ind. and serves as an alternate on NEC Code-Making Panel No. 3. He is currently licensed in more than 80 jurisdictions. He can be reached at [email protected].

About the Author

John Lupacchino | Senior Design Engineer

John began his career in electrical construction as an apprentice and worked his way through the trade. He is currently licensed in more than 80 jurisdictions. With more than 35 years of experience, he now plays a vital role in Gaylor Electric’s Engineering Department, where he serves as a senior design engineer. With a focus on design engineering, quality assurance, and code compliance, he has earned the highest level of respect from industry professionals alike. John currently serves as an alternate on NFPA 70 Code Making Panel No. 3. In addition, he enjoys sharing his electrical knowledge through education. As an Associated Builders and Contractors instructor, he continues to help grow a new generation of high-performing construction leaders.