×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Magnetic flux create by cable

Magnetic flux create by cable

Magnetic flux create by cable

(OP)
What should be a reasonable magnetic clearance from steel support assuming that there is a cable passing through a steel closed loop.
This example is typical for cable termination for HV cable installation that usually is installed with an open loop in the steel. However, we did not find a reasonable explanation why to use an open loop in the steel.

RE: Magnetic flux create by cable

Hello cuky;
The Canadian Electrical Code does not ban magnetic encirclement for currents below 200 Amps.
If your current will be above 200 Amps I would consider slotting the steel or using stainless steel or aluminum for the support plate..
I can't give you a dimension but anecdotally, I have seen severe heating with conductors passing through a hole larger than your whole plate.
Bill
--------------------
"Why not the best?"
Jimmy Carter

RE: Magnetic flux create by cable

How many conductors in the cable, Just 1 conductor I think from the photo, right?
What current (AC or DC) in each conductor,
What is the equivilent "hole dia" in the support steel? Is it right up against the conductors, or much larger than the conductors? The diagram in the photo appears to show mag force levels as a distance from the conductor, not as a steel suport distance.

RE: Magnetic flux create by cable

A single conductor at 1000A, as shown on your figure, will generate a significant amount of heat. If you don't want to put an open loop in the steel, then consider stainless or aluminum like waross suggested.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources