ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
Shout Box
Recent Posts
Linear Power Supply Quits Under Load
by JoeTestingEngr. 10/18/18 08:47 PM
220/230/240V 60Hz Systems
by dsk. 10/17/18 01:25 PM
PLC/HMI Enclosure C2, D1
by ghost307. 10/16/18 03:31 PM
Tingle off the water spigot
by dsk. 10/15/18 02:36 PM
New in the Gallery:
What is this for?
Plug terminals
Who's Online Now
0 registered members (), 7 guests, and 24 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Derating wire plus voltage drop #58732
11/15/05 10:46 PM
11/15/05 10:46 PM
B
bot540  Offline OP
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
Re: Derating wire plus voltage drop #58733
11/15/05 11:22 PM
11/15/05 11:22 PM
C
Cow  Offline
Member
Joined: Jul 2005
Posts: 33
Hermiston, OR

Re: Derating wire plus voltage drop #58734
11/16/05 12:44 AM
11/16/05 12:44 AM
B
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.


Featured:

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

 

Member Spotlight
The_Lightman
The_Lightman
Orlando, Fl, USA
Posts: 49
Joined: August 2001
Show All Member Profiles 
Top Posters(30 Days)
sparky 11
Popular Topics(Views)
250,634 Are you busy
188,128 Re: Forum
177,805 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.6.1
(Release build 20180101)
Page Time: 0.014s Queries: 14 (0.003s) Memory: 0.9509 MB (Peak: 1.0756 MB) Zlib enabled. Server Time: 2018-10-22 22:58:16 UTC