Code books
 

Construction Codebooks and Estimating Guides

NEC Quiz: Article 240 Answers

Back to Quiz

  1. [240.4(A)]. This is a trick question. Actually, you don't install OCPDs on a fire pump (see Article 695). OCPDs aren't required where interruption of the circuit would cause a hazard.
     

  2. [240.4(G)]. Yes. See Table 240.4(G).
     

  3. [240.12]. They are coordinated short-circuit protection and overload indication based on monitoring systems or monitoring devices.
     

  4. [240.30(A)(1)]. Install them in enclosures, cabinets, cutout boxes, or equipment assemblies; or
    Mount them on open-type switchboards, panelboards, or control boards that are in rooms free from dampness (and from easily ignitable material) and are accessible only to qualified personnel.
     

  5. [240.93(C)]. You can't use it if:
    1. Motors are connected on the load side of the higher-rated OCPD and on the line side of the lower-rated OCPD, and
    2. The sum of the motor full-load currents exceeds 1 percent of the interrupting rating of the lower-rated OCPD.

 

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: