The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!


2017 NEC and Related
2017 NEC
Now Available!

Recent Posts
International Wire Colour Codes
by Tjia1981
Yesterday at 09:09 PM
Son of Sparky
by HotLine1
10/20/16 07:43 PM
Speaking of Plugmold ...
by gfretwell
10/17/16 02:37 PM
Broken battery charger? Check for cobwebs!
by gfretwell
10/17/16 02:30 PM
230 or 345 kV transmission lines?
by annemarie1
10/12/16 01:23 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
gfretwell 11
HotLine1 6
renosteinke 6
ghost307 5
Potseal 4
Who's Online
0 registered (), 159 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#94326 - 07/22/05 11:49 AM sizing service with voltage drop
pwregan Offline
New Member

Registered: 06/04/05
Posts: 6
Loc: 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

2014 / 2011 NEC & Related Books and Study Guides
#94327 - 07/27/05 07:11 PM Re: sizing service with voltage drop
e57 Offline

Registered: 05/27/03
Posts: 2837
Loc: S.F.,CA USA
Mark Heller
"Well - I oughta....." -Jackie Gleason

#94328 - 07/28/05 12:18 AM Re: sizing service with voltage drop
DiverDan Offline

Registered: 03/10/05
Posts: 38
Loc: 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).]
Dolphins Software


ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals