Ecmweb 24935 Nec Logo 3 0 3
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Code Q&A: Permitted Uses for LFNC

June 13, 2019
Check your knowledge of where the Code permits the use of liquidtight flexible nonmetallic conduit.

Q. What uses are permitted by the Code for liquidtight flexible nonmetallic conduit (LFNC)?

See the answer below.

A. Listed LFNC is permitted, either exposed or concealed, at any of the following locations [Sec. 356.10]:

Informational Note: Extreme cold can cause nonmetallic conduits to become brittle and more susceptible to damage from physical contact.

(1) If flexibility is required.

(2) If protection from liquids, vapors, or solids is required.

(3) Outdoors, if listed and marked for this purpose.

(4) Directly buried in the earth, if listed and marked for this purpose.

(5) LFNC (gray color) is permitted in lengths over 6 ft if secured in accordance with 356.30.

(6) LFNC, Type B (black color) as a listed manufactured prewired assembly.

(7) Encasement in concrete if listed for direct burial.

These materials are provided to us by Mike Holt Enterprises in Leesburg, Fla. To view Code training materials offered by this company, visit www.mikeholt.com/code.

About the Author

Mike Holt

Mike Holt is the owner of Mike Holt Enterprises (www.MikeHolt.com), one of the largest electrical publishers in the United States. He earned a master's degree in the Business Administration Program (MBA) from the University of Miami. He earned his reputation as a National Electrical Code (NEC) expert by working his way up through the electrical trade. Formally a construction editor for two different trade publications, Mike started his career as an apprentice electrician and eventually became a master electrician, an electrical inspector, a contractor, and an educator. Mike has taught more than 1,000 classes on 30 different electrical-related subjects — ranging from alarm installations to exam preparation and voltage drop calculations. He continues to produce seminars, videos, books, and online training for the trade as well as contribute monthly Code content to EC&M magazine.

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