NEC question on conduit size

Reply

  #1  
Old 06-09-05, 02:11 PM
Member
Thread Starter
Join Date: Jun 2005
Location: USA
Posts: 107
Received 0 Votes on 0 Posts
NEC question on conduit size

I plan on running a PVC conduit across my garage ceiling from the main panel to the other side. I was thinking a 3" conduit might be sufficient but I'd like to get input. I plan on running the following:

-2 #4AWG cables
-4 #6AWG
-1 #8AWG
-1 #10AWG

Would 3" be sufficient to meet code?
 
Sponsored Links
  #2  
Old 06-09-05, 02:27 PM
Forum Topic Moderator
Join Date: Feb 2005
Location: Near Lansing, Michigan
Posts: 10,944
Received 42 Votes on 40 Posts
My calculations indicate that 1-1/4" would be sufficient for sch 40 PVC, EMT, or rigid metallic conduit. Each of those has less than 30% fill for the conductors you listed. 40% is the limit in this case.
 
  #3  
Old 06-09-05, 03:11 PM
Member
Thread Starter
Join Date: Jun 2005
Location: USA
Posts: 107
Received 0 Votes on 0 Posts
Originally Posted by ibpooks
My calculations indicate that 1-1/4" would be sufficient for sch 40 PVC, EMT, or rigid metallic conduit. Each of those has less than 30% fill for the conductors you listed. 40% is the limit in this case.

Thanks for the reply. Where did you look to obtain those calculations?
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: