Code Q&A: Sizing a Raceway

NEC requirements for sizing a raceway

Q. What are the NEC requirements for sizing raceways?

Find the Answer

A. Raceways must be large enough to permit the installation and removal of conductors without damaging the conductor’s insulation [300.17]. When all conductors in a raceway are the same size and of the same insulation type, the number of conductors permitted can be determined by Annex C. When different size conductors are installed in a raceway, conductor fill is

Register to view the full article

Register on EC&M and gain access to premium content, including this article and much more.

Hide comments


  • Allowed HTML tags: <em> <strong> <blockquote> <br> <p>

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.