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NEC Quiz: Article 250, Part Five

Quiz Questions

Code Quiz: Article 250, Part 5

Based on the 2008 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. He is a former editor of an electrical magazine were he edited Code articles.

  1. You have to run the grounded conductor(s) of an AC service to each service disconnect, when what two conditions exist?
     

  2. Is there an exception to this?
     

  3. Can you route the grounded conductor in a separate raceway from the phase conductors?
     

  4. What do we call the conductor that connects the equipment grounding conductors to the grounding electrode(s) required in 250, Part III?
     

  5. Where do you find the sizing requirements for this conductor?

 

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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.

 

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