floor fan hxdbzxy/iStock/Thinkstock

Electrical Troubleshooting Quiz - Dec. 23, 2014

Why are the overloads blowing?

The plant engineer asked you to walk out to the small MCC near the plant’s paper making machine. There, he pointed to an open cubicle with a floor fan blowing into it.

“That’s the motor starter for the main drive motor under the machine. The operators put that fan there to keep the overloads from blowing. I want you to put a lock on that door and figure out why the overloads blow.”

 Where do you start?

After you put a lock

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.