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NEC Quiz: Article 424, Part 6

by Mark Lamendola

Quiz Questions

Code Quiz: Article 424, Part 6

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 VI of Article 424 is titled "Duct Heaters" but what exactly is covered by Part VI?

  2. What are three types of use that require the equipment to be identified as suitable to that use?
  3. A means must be provided to ensure the fan circuit is energized when a particular condition exists. What is that condition?
  4. What must be provided with each duct heater?
  5. Not only must you install a duct heater per manufacturer's instructions and locate them witih respect to building construction and other equipmen to permit access to the heater, but also a specific clearance requirement must be met. What is that requirement?

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