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NEC Quiz: Article 409

by Mark Lamendola

Quiz Questions

Code Quiz: Article 409

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 409 provides the requirements for industrial control panels intended for general use and operating at 1000V or less.

  1. What is the minimum size and ampacity of the industrial control panel supply conductor?

  2. What's the rule for providing overurrent protection for industrial control panels?
  3. Where must you install the overcurrent protection?
  4. Based on short-circuit current ratings, where can you not install an industrial control panel?
  5. Where can you find the requirements for industrial control panel construction specifications?

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