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National Electrical Code Articles and Information

NEC Quiz: Article 430

by Mark Lamendola

Quiz Questions

Code Quiz: Article 430, 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 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 430 provides the requirements for motors, including the hermetic motors that also have additional requirements covered in Article 440. Many other articles also may apply to a given motor installation. Article 430 is the largest article in the NEC.


  1. Article 430 is huge. Is there a quick, easy way to make sense of it and how it's organized ?

  2. How can you know which other articles apply to motors?
  3. What is a part-winding motor?
  4. On which rating do you base separate motor overload protection?
  5. If a motor is marked with a locked rotor indicating letter of D, will it have a higher or lower KVA/HP with locked rotor value than a motor marked with a K?

Answers to this quiz are here: Answers to this quiz

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