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#94326 - 07/22/05 02:49 PM sizing service with voltage drop  
pwregan  Offline
New Member
Joined: Jun 2005
Posts: 6
Plymouth,MA
doing a new home with a underground service that is about 250 feet long,could anyone show me how to calculate wire size?
thank you,
patrick regan


2017 / 2014 NEC & Related Books and Study Guides

#94327 - 07/27/05 10:11 PM Re: sizing service with voltage drop  
e57  Offline
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Joined: May 2003
Posts: 2,876
S.F.,CA USA


Mark Heller
"Well - I oughta....." -Jackie Gleason

#94328 - 07/28/05 03:18 AM Re: sizing service with voltage drop  
DiverDan  Offline
Member
Joined: Mar 2005
Posts: 38
Sacramento, CA
That very simple calculator is missing both ambient and terminal temperatures ,raceway types and power factor...all having a major factor in VD computation.

Try this one as it takes everything into consideration inclusive of raceway types and temperatures. Also the VD formula is not a simplistic 2KID but rather IEEE 141 exact formula.
http://www.dolphins-software.com/Volts_Setup.exe

[This message has been edited by DiverDan (edited 07-28-2005).]


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