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National Electrical Code Articles and Information

Based on the 2017 NEC

by Mark Lamendola

National Electrical Code Top Ten Tips: Article 514 -- Motor Fuel Dispensing Facilities

  1. Article 514 covers any structure used for storing or dispensing fuel from fixed equipment. It also applies to fuel dispensing facilities for fleets [514.1].
  2. Article 514 distinguishes between locations handling Class I liquid fuels and those handling three other fuels: compressed natural gas, liquefied natural gas, and liquefied petroleum gas [514.3].
  3. Table 514.3(B)(1) defines Class I locations for the purposes of Article 514.
  4. Table 514.3(B)(2) defines electrical equipment classified areas for fuel dispensing.
  5. Equipment covered by Table 514.3(B)(1) must be wired per Article 501 [514.4].
  6. Equipment located above equipment covered by Table 514.3(B)(1) must also be wired per Article 501 [514.7], as if it is actually equipment covered by Table 514.3(B)(1) [514.4].
  7. Install underground wiring in threaded metal conduit, not EMT or PVC [514.8]. Some exceptions apply.
  8. Provide a listed seal in each conduit (here, we can refer to the raceways as conduit because in this case they are) entering or leaving a dispenser. The sealing fitting must be the first fitting after the conduit emerges from the earth or concrete [514.9(A)].
  9. In addition to the dispenser seals, provide seals at the horizontal and vertical boundaries of the defined Class I locations  [514.9(B)].
  10. Ground and bond all metal raceways and metallic objects [514.16], taking care not to confuse grounding with bonding [Article 100]. Grounding and bonding are not interchangeable procedures, and they do not accomplish the same things. If in doubt, bond instead of ground.

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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