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NEC Quiz: Article 424, Part 10

by Mark Lamendola

Quiz Questions

Code Quiz: Article 424, Part 10

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 X of Article 424 is titled "Low-Voltage Fixed Electric Space-Heating Equipment". What exactly is covered by Part X?

  2. What is the maximum rated output that a power supply for this kind of equipment can have?
  3. Can you supply this equipment directly from an alternative energy source such as solar photovolataic or wind power? If not, why not? If so, under what conditions?
  4. Low-voltage fixed electric space heating equipment must be listed as X. What is X?
  5. What is the maximum rating allowed for a branch circuit that supplies this kind of equipment?

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