Code Quiz of Day

Ampacities for Flexible Cords and Cables

March 25, 2015

Article 400 covers the general requirements, applications and construction specifications for flexible cords and cables.

Mike Holt

Where flexible cords are used in ambient temperatures other than _____ the temperature correction factors from Table 310.15(B)(2)(a) shall be applied to the ampacity in Table 400.5(A)(1) and Tables 400.5(A)(2).

a) 30°C
b) 60°C
c) 75°C
d) 90°C

See answer and applicable Code reference

The correct answer is: a) 30°C

Article 400 covers the general requirements, applications and construction specifications for flexible cords and cables. As noted in a portion of Sec. 400.5(A), "Where cords and cables are used in ambient temperatures other than 30°C, the temperature correction factors from Table 310.15(B)(2)(a) that correspond to the temperature rating of the cord or cable shall be applied to the ampacity in Table 400.5(A)(1) and Table 400.5(A)(2)."

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.