ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Top Posters(30 Days)
Potseal 11
Recent Posts
600 KW 120/208 3 Phase Y protection
by Yooperup. 07/24/17 12:20 PM
1913 American Electrician's Handbook
by gfretwell. 07/20/17 01:08 PM
Green House wiring
by ghost307. 07/20/17 09:10 AM
Permit Snafus...AHJs and Contractors Jump in
by HotLine1. 07/18/17 08:06 PM
New in the Gallery:
SE cable question
Popular Topics(Views)
239,343 Are you busy
174,810 Re: Forum
167,188 Need opinion
Who's Online Now
0 registered members (), 53 guests, and 4 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate This Thread
#58732 - 11/15/05 10:46 PM Derating wire plus voltage drop  
bot540  Offline
Member
Joined: Sep 2004
Posts: 174
Vernon Hills, IL
If you already upsized the wire for voltage drop would you have to further derate the wire if you have more than 4 current carrying conductors? Do the calculations compound?


Jesus may have been a capenter,but God was an electrician.Genesis1:3

Work Gear for Electricians and the Trades

#58733 - 11/15/05 11:22 PM Re: Derating wire plus voltage drop  
Cow  Offline
Member
Joined: Jul 2005
Posts: 33
Hermiston, OR


#58734 - 11/16/05 12:44 AM Re: Derating wire plus voltage drop  
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
First caculate the load.
Size the wire for the load.
Derate per the table 80%. This will give you a larger conductor. Caculate the VD using this conductor.
If you have to go larger you do not derate again.



Member Spotlight
JoeKP
JoeKP
Berkley, MA
Posts: 144
Joined: March 2008
Show All Member Profiles 
Featured:

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

 

Shout Box
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.010s Queries: 14 (0.002s) Memory: 0.7509 MB (Peak: 0.8743 MB) Zlib enabled. Server Time: 2017-07-26 08:31:48 UTC