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NEC Quiz: Article 250, Part Fourteen Answers

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  1. This passage actually refers to bonding. The reference is Article 100, which provides the definitions of grounding and bonding. Grounding in this passage makes no sense from a technical standpoint, so the correct word is bonding.
     

  2. [250.114]. Again, we have a word misuse. The equipment must be connected to an "equipment grounding conductor" which is, in actuality, an equipment bonding conductor. There are a few exceptions to this requirement, but generally it applies.
     

  3. [250.118]. No. It doesn't even have to be wire. See the 14 types of EGC in 250.118.
     

  4. [250.122(A)]. Yes. It can't be smaller than shown in Table 250.122, but doesn't need to be larger than the circuit conductors supplying the equipment.
     

  5. [250.122(F)]. Yes, if you run the ungrounded conductors in parallel.

 

 

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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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