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National Electrical Code Articles and Information

NEC Quiz: Article 399

by Mark Lamendola

Quiz Questions

Code Quiz: Article 399

Based on the 2014 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.

Article 399 is the final Article in Chapter 3. Weighing in at less than a full page, it's also one of the shortest Articles in Chapter 3 and in the NEC overall. It's very different from other Chapter 3 Articles, also. For example, it does not address a particular wiring method.

  1. As stated above, Article 399 does not address a particular wiring method. What does it address, and how does that differ from a wiring method?

  2. Name three permitted uses for this wiring method.

  3. Name the prohibited uses for this wiring method.

  4. What type hardware is permitted for supporting this wiring method?

  5. What restriction is there on using couplings and connectors with this wiring method?

Answers to this quiz are here: Answers to this quiz

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