National Electrical Code Articles and Information

Code Quiz: Article 424, Part 1

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 Codebookcity.com. 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. Is heating cable considered heating equipment under Article 424?
   

2. Is a heat pump covered by Article 424 or by Article 440?
   
3. If a branch circuit supplies more than one outlet for fixed electric space-heating equipment, what's the maximum size it can be?
   
4. Are motors for heating equipment considered noncontinuous loads or continuous loads?
   
5. If you wish to install some heaters in a damp location, what requirements must you meet?

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