INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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!

*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.

Jobs

Link To This Forum!

Partner Button
Add Stickiness To Your Site By Linking To This Professionally Managed Technical Forum.
Just copy and paste the
code below into your site.

Aluminum busbar ampacity tables

Aluminum busbar ampacity tables

(OP)
Does anyone know where I can find (on the Internet) ampacity tables for aluminum busbar?

RE: Aluminum busbar ampacity tables


Maybe this will do.  NEC 374-6 For aluminum bars, the current carried continuously shall not exceed 700 amperes/in.² of cross section of the conductor.
  

RE: Aluminum busbar ampacity tables

(OP)
busbar,

Thanks for the response. I am specifically seeking current ratings (ampacities) of rectangular aluminum bar of a 6101 alloy (electrical grade aluminum). The tables specify size (1/4" x "x", 1/2" x "x", etc.), orientation (horizontal or vertical mount), number of parallel bars, and alloy versus current ratings. Alcoa used to publish a handbook with tables such as I am seeking; however, I do not have a handbook and Alcoa can't seem to locate one.

P.S. I could not locate the code section quote you listed in the 2002 NEC. Did you make a typo or am I looking in the wrong section?

RE: Aluminum busbar ampacity tables

Try this, IT's the onlline version of the "Technical Data- A reference for the Electrical Power Industry".  It's worth downloading and sticking on a CD.


http://www.hubbellpowersystems.com/powertest/catalog_sections/Technical_Data.pdf

RE: Aluminum busbar ampacity tables


amptramp, it was a basic rule of thumb from the 1999 NEC.  Looks like you need more detail.  

BJC suggested a much more detailed reference.
  

RE: Aluminum busbar ampacity tables

(OP)
I found this guide which shows how to calculate the current rating. I ran a couple size variations and the results were close to the tables I have. All the tables I have found stop at 1/2" thick bar.

http://217.153.88.147/Poradniki_guides/MV_DESIGN_GUIDE.pdf

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

White Paper: Agile Product Engineering and Improved Product Outcomes
Today’s product development cycle is fraught with difficulties. Increased demands for complex functionality and reduced product development windows cause engineering teams to borrow practices from the IT industry, swapping outdated serial workflows for a more flexible and collaborative design method known as Agile Product Engineering. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close