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National Electrical Code Articles and Information

NEC Quiz: Article 320

by Mark Lamendola

Quiz Questions

Code Quiz: Article 320

Based on the 2011 NEC

Questions and answers written by Mark Lamendola, who has worked as a master electrician, electrical inspector, and design engineer. Mark is an IEEE Senior Member, and the Code article author for Since 1996, he has been writing National Electrical Code articles for electrical trade magazines and has an extensive portfolio of hundreds of NEC articles..

  1. Article 320 is the first in a series of Chapter 3 articles addressing specific wiring methods. Which one does it address?

  2. Name three permitted uses for this wiring method.

  3. Name three prohibited uses for this wiring method.

  4. What's the minimum bend radius for this wiring method?

  5. Are support requirements relaxed, using this wiring method? Given its metal construction, is a reason for using it to reduce support requirements?

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