Stumped by the Code? Rules for sizing transformer secondary conductors?

Stumped by the Code? Rules for sizing transformer secondary conductors?

Your most pressing National Electrical Code (NEC) questions answered

Q. What are the NEC rules for sizing transformer secondary conductors?

A. A set of conductors supplying single or separate loads is permitted to be connected to a transformer secondary without overcurrent protection in accordance with 240.21(C)(1) through (6). Note: The permission of the “next size up” protection rule when the conductor ampacity doesn’t correspond with the standard size overcurrent protection device of 240.4(B) doesn’t apply t

Register to view the full article

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

Hide comments

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.
Publish