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National Electrical Code Articles and Information

NEC Quiz: Article 322 Answers

by Mark Lamendola

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  1. Flat Cable Assemblies (Type FC). It's a flat cable integrated with connectors (thus making it an assembly).

  2. There are four: As branch circuits to supply suitable tap devices for certain kinds of small loads (e.g., lighting, small appliances, small power loads), where installed for exposed work, in locations not subject to physical damage, and in surface metal raceways identified for the use [322.10].

  3. There are four: where exposed to corrosive conditions (unless suitable for the application), in hoistways (or on elevators or escalators), in any hazardous (see Chapter 5) location (except where specifically authorized in the NEC), and outdoors (or in wet or damp locations) unless identified for the use [322.12].

  4. That's a trick question. You do not support it with staples. You must secure and support flat cables using their special design features [322.30].

  5. Use approved wiring methods, within the junction boxes, installed at either end of the flat cable assembly runs [322.40(D)]. This requirement excludes (from acceptability) such things as soldering extensions onto the flat cable conductors. That practice is mentioned here because electronics technicians sometimes mistakenly apply their techniques to 50V and higher power circuits.



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.

Try your NEC moxy:

  • Do you know the difference between bonding and grounding? Hint: Look in the NEC, Article 100.
  • Does the NEC refer to grounding incorrectly in any of its articles? Yes! So be careful to apply the Article 100 definitions. Don't ground where you should bond.
  • When doing motor load calculations, which Article covers hermetic motors? Answer: While Article 440 covers the application of hermetic motors, it does so only by amending Article 430 because hermetic motors are a special case of motors. For motor load calculations, refer to Article 430.
  • Does the NEC provide a voltage drop requirement? Yes! It does so in a special case, which is Article 648 Sensitive Electronic Equipment. But for general applications, it does not provide a requirement; it merely provides a recommendation in a couple of FPNs.
  • Take our Code Quizzes.

Remember other applicable codes, rules, standards, and references:

  • OSHA's electrical worker safety rules.
  • IEEE standards.
  • NETA standards.
  • NFPA standards.
  • International Codes (if applicable to the installation).
  • State Codes (if the state has them).
  • Local ordinances and permit requirements.
  • Local fire codes.
  • Manufacturer requirements or guidelines.
  • Customer security requirements.
  • Industry standards.
  • Your company's own internal standards, practices, and procedures.
  • Engineering drawing notes.



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