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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
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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.


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