Code books
 

Construction Codebooks and Estimating Guides

+National Electrical Code Explanations

National Electrical Code Top Ten Tips: Article 511, Commercial Garages, Repair and Storage

  1. The occupancies covered by Article 511 include locations used for the service and repair of self-propelled vehicles (such as cars and buses) that use flammable liquids or gases as their fuel [511.1].
     
  2. Article 511 distinguishes between major repair garages and minor repair garages [511.2]. The requirements that follow differ, depending on which of these is the location of the installation.
     
  3. If you store, handle, or transfer Class I fuels in a given area, you must install electrical equipment per Class I requirements [511.3].
     
  4. Parking garages can be unclassified [511.3(A)], as long as they don't double as some other area that is classified (e.g., fuel dispensing)..
     
  5. Floors, pits, and depression are critical areas, because liquids and heavier than air gases can pool in low areas.
     
  6. Ceilings and any "inverted depressions" (e.g., spaces between joists) in them are critical areas, because lighter than air gases can accumulate in them.
     
  7. Areas adjacent to classified areas can be unclassified, if flammable vapors are unlikely to be released and certain other conditions are met [511.3(E)(1)].
     
  8. If a garage location is Class I per 511.3, wire it per Article 501 [511.4(A)].
     
  9. If a garage location is Class I per 511.3, install only equipment that conforms to Article 501 [511.4(b)].
     
  10. Installations above Class I locations must also meet certain requirements [511.7].
    11.

We work closely with Mike Holt. If you want to boost your Code competence dramatically, check out the Holt courses and guides we offer. These are well-researched and noted for their accuracy and clarity. Go with the best, so you can be one of the best.

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.

 

 

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: