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sizing service with voltage drop #94326
07/22/05 02:49 PM
07/22/05 02:49 PM
pwregan  Offline OP
New Member
Joined: Jun 2005
Posts: 6
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
Re: sizing service with voltage drop #94327
07/27/05 10:11 PM
07/27/05 10:11 PM
e57  Offline
Joined: May 2003
Posts: 2,876

Mark Heller
"Well - I oughta....." -Jackie Gleason
Re: sizing service with voltage drop #94328
07/28/05 03:18 AM
07/28/05 03:18 AM
DiverDan  Offline
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.

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

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