Extreme _____ may cause PVC conduit to become brittle and, therefore, more susceptible to damage from physical contact.
a) sunlight
b) corrosive conditions
c) heat
d) cold
See answer and applicable Code reference
The correct answer is: d) cold
Article 352 covers the use, installation, and construction specifications for rigid polyvinyl chloride conduit and associated fittings. As noted in an Information Note in Sec. 352.10, "Extreme cold may cause some nonmetallic conduits to become brittle and, therefore, more susceptible to damage from physical contact."
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.