ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat
Recent Posts
Al Hildenbrand - Minneapolis - obituary
by Bill Addiss - 02/03/23 07:38 PM
Violation?
by renosteinke - 01/27/23 09:52 PM
Does NEC 551.71 (F) apply to dwellings?
by BigB - 01/20/23 10:46 AM
Power submeter connections
by HotLine1 - 01/19/23 09:09 AM
New in the Gallery:
Burger King crown sillyness
Burger King crown sillyness
by wa2ise, December 11
240/208 to a house
240/208 to a house
by wa2ise, October 9
Who's Online Now
0 members (), 125 guests, and 10 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
#128974 06/09/04 08:37 AM
Joined: Dec 2001
Posts: 201
A
ayrton Offline OP
Member
Why do you think the code prohibits running parallel conductors smaller than 1/0??

#128975 06/09/04 11:00 AM
Joined: Jan 2002
Posts: 59
C
Member
If you study the ampacity tables you will see that in the larger sizes of wire an increase in size results in relatively little increase in ampacity. Forinstance, a 50% increase from 10 kcmil to 10.5 kcmil results in an increase in carrying capacity in amperes of less than 15%.
There is no need to parallel conductors smaller than 1/0 because the difference between the carrying capacity in these sizes is much less pronounced.
Although the NEC places the limit, it is really physics that limits paralleled conductors to 1/0 and larger.
Creighton


Link Copied to Clipboard
Featured:

Tools for Electricians
Tools for Electricians
 

* * * * * * *
2023 National Electrical Code (NEC)
2023 NEC Now Available!
 
* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
lil suzi
lil suzi
Midwest
Posts: 57
Joined: August 2003
Top Posters(30 Days)
triple 3
BigB 3
Popular Topics(Views)
303,160 Are you busy
232,170 Re: Forum
216,903 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.5