Q. What are the Code rules for field bends made in a run of PVC conduit?
See the answer below.
A. Raceway bends aren’t permitted to be made in any manner that would damage the raceway, or significantly change its internal diameter (no kinks). Field bends must be made only with identified equipment. The radius of the curve of the inner edge of any field bend isn’t permitted to be less than shown in Chapter 9, Table 2 [Sec. 352.24].
Be sure to use equipment designed for heating the nonmetallic raceway so it’s pliable for bending (e.g., a “hot box”). Don’t use open-flame torches.
To reduce the stress and friction on conductor insulation, the total amount of bends (including offsets) between pull points must not exceed 360° [Sec. 352.26].
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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.