Q. What uses are not permitted by the NEC for liquidtight flexible nonmetallic conduit?
See the answer below.
A. Liquidtight flexible nonmetallic conduit (LFNC) cannot be used if:
(1) subject to physical damage [Sec. 356.12].
(2) the ambient temperature and/or conductor temperature is more than its listing.
(3) Longer than 6 ft, except if approved by the authority having jurisdiction (AHJ) as essential for a required degree of flexibility.
(4) In any hazardous location, except as permitted by Sec. 501.10(B), Sec. 502.10(A) and (B), and Sec. 504.20.
LFNC is a flexible version of PVC and is made from a more pliable type of PVC more commonly referred to as Carflex.
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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.