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NEC Quiz: Article 424, Part 9

by Mark Lamendola

Quiz Questions

Code Quiz: Article 424, Part 9

Based on the 2017 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 424 provides the requirements for fixed electric space-heating equipment.

  1. Part IX of Article 424 is titled "Electric Radiant Heating Panels and Heating Panel Sets" but what exactly is covered by Part IX?

  2. What is the most common use for this kind of equipment?
  3. How far must these be from any outlet boxes or junction boxes used for mounting surface luminaires?
  4. Can you install these panels in concrete or poured masonry?
  5. If you install one of these heaters under a floor covering, what requirement must the branch circuit meet?

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