Code Q&A: Sizing Conductors for a Single Motor

NEC requirements for sizing motor conductors

Q. What is the Code rule for sizing conductors serving a single continuous duty motor?

Find the Answer

A.  Conductors to a single motor must be sized not less than 125% of the motor full load current (FLC) rating as listed in Table 430.247 [Direct-Current Motors], Table 430.248 [Single-Phase Motors], or Table 430.250 [Three-Phase Motors (430.22)].

Let’s run through an example problem to show you exactly how to choose

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