What is required to be done at each cut end of liquidtight flexible metal conduit (LFMC)?
A. Cut the ends at an angle
B. Trim inside and outside to remove rough edges
C. Protect the cut edge by applying cold galvanizing
D. Rough up the edges to ensure grounding continuity
See the answer below.
Answer: B
The 2017 NEC added Sec. 350.28, which states "All cut ends of conduit shall be trimmed inside and out to remove rough edges." This is necessary to ensure the steel ferrule will maintain the grounding connection between the conduit and the connector.
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.