Code books
 

Construction Codebooks and Estimating Guides

NEC Quiz: Article 225 Answers

Back to Quiz

  1. [225.6] 10 AWG copper or 8 AWG aluminum, if 600V or less for spans up to 50 ft (longer spans are allowed if supported by messenger wire). For over 600V, it's 6 AWG copper or 4 AWG aluminum.
     

  2. [225.14(C). 4 inches.
     

  3. [225.30]. One. But, there are exceptions for 6 special conditions and for some other situations as noted in A, B, C, D, and E..
     

  4. [225.33]. No, the rules are the same because the underlying physics are the same. You have a maximum of 6 disconnects allowed.
     

  5. [225.40]. You must install branch circuit overcurrent devices on the load side, in a readily accessible location. These must be of lower ampere rating than the feeder overcurrent device.

 

Other Codes

More NFPA 70 Resources
Learn more about: Mike Holt Ultimate Electrician Training Library

Contractor Cafe Code Site | Joe Tedesco's National Electrical Code

How the NEC is arranged

  1. The first four Chapters of the NEC apply to all installations.
  2. Article 90 precedes Chapter One, and establishes the authority of the NEC.
  3. Article 80 follows the body of the NEC; it exists as Annex H. It provides the requirements for administration.
  4. Chapters 5, 6, and 7 are the "special" chapters, covering special: occupancies, equipment, and conditions (in that order).
  5. Chapter 8 provides the requirements for communications systems.
  6. Chapter 9 provides tables.
  7. The appendices provide mostly reference information.
  8. Appendix D contains examples that every NEC user should study.

 

 

These keywords may have brought you here: nec quiz, code quiz, test nec knowledge, national electrical code

Pass the Electrical Exam | Get Codebooks | Get Estimating Guides
Codebookcity is a subsidiary of Mindconnection, LLC. If you have any questions, comments, or concerns, please write to sales @ mindconnection.com. We do want your business.
 

We support engineering and the construction trades. Based in Kansas City, we also participate locally. Here are the meetings of the IEEE Kansas City Section and Society Chapters: