ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
AreMetal Ladders Ever OK For Electrical Work?
by gfretwell. 01/22/18 01:15 AM
VDE 0100 to introduce AFCIs
by sparky. 01/20/18 05:09 PM
MRI LED lights dimmer control replacement - wow!
by Potseal. 01/19/18 08:52 PM
Video: Inventor of the GFCI self-testing shocks
by Bill Addiss. 01/17/18 11:11 PM
New in the Gallery:
Housebilding DIY wiring
SE cable question
Who's Online Now
0 registered members (), 8 guests, and 12 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Parallel conductors #128974
06/09/04 08:37 AM
06/09/04 08:37 AM
A
ayrton  Offline OP
Member
Joined: Dec 2001
Posts: 201
Pa
Why do you think the code prohibits running parallel conductors smaller than 1/0??

Tools for Electricians:
Re: Parallel conductors #128975
06/09/04 11:00 AM
06/09/04 11:00 AM
C
Creighton  Offline
Member
Joined: Jan 2002
Posts: 59
Hayward, CA
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


Featured:

2017 Master Electrician Exam Preparation Combos
2017 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
dougwells
dougwells
kamloops BC Canada
Posts: 1,142
Joined: May 2003
Show All Member Profiles 
Top Posters(30 Days)
Admin 21
sparky 16
Potseal 15
Popular Topics(Views)
243,592 Are you busy
180,388 Re: Forum
170,861 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.015s Queries: 14 (0.004s) Memory: 0.9403 MB (Peak: 1.0593 MB) Zlib enabled. Server Time: 2018-01-22 12:27:37 UTC