×
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

Cable bus connections

Cable bus connections

Cable bus connections

(OP)
Hello,

High current application busbar systems typical have multiple bars per phase spaced 1 bar thickness apart in order to allow better utilization of the conductor material i.e. for skin effect.

My question is...

When I bring a feeder cable into the bus compartment to connect to the bus do I need to insert metal spacers in between every run underneath where I make the cable-bus connection?  Or do I simply bolt my lug through all runs with a nut on the other side (and acceptable washers etc. of course)?

Any help appreciated...

Regards,
TULUM

 

RE: Cable bus connections

You must bring the individual bars together or use spacers made of bus bar material. If not, you will not be able to get adquate pressure on the lug connection and the current will not divide equally between the bars. It is common to provide a solid bar connection point for cables rather than bolting lugs directly to multi-bar buses.

RE: Cable bus connections

(OP)
Thanks Alehman.

Regards,
TULUM

RE: Cable bus connections

 
alehmen’s suggestion of a through bolt and copper spacers will minimize local (over)heating at the tap.  The result will be load dependent, but it is the safest approach.
   

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