[RE-wrenches] voltage drop

[Wind-sun.com]

I looked at the resistance values you have in that spreadsheet. Do you have 
some kind of "fudge factor" built into it for temperature?

The values in the spreadsheet seem to be the NEC values for 75C. For 
example, #10 your sheet shows 1.24 ohms/1000 feet, whereas the "standard" at 
25C is around.998 to 1.014 ohms.

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Northern Arizona Wind & Sun - Electricity From The Sun
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----- Original Message ----- 
From: "William Miller" <wrmiller at charter.net>
To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
Sent: Tuesday, December 09, 2008 1:27 PM
Subject: Re: [RE-wrenches] voltage drop


> Colleagues:
>
> We have a voltage drop spread sheet on our web site.  Excuse any 
> immodesty, but we feel it is superior to any others we have seen for 
> several reasons, including the spreadsheet allows you to judge a range of 
> wire sizes in one glance and you are not limited to standard voltage (120, 
> 240, etc) like other charts.  I have recently updated the sheet I use to 
> also account for temperature and conduit fill.  The newest version is on 
> the web yet, but I will get it there in the next few days.  IN the 
> meantime, the tried and true tool is at: 
> http://mpandc.com/resources/resources.html  It is about the fourth item 
> down.
>
> I have heard from many installers and designers that they use the sheet 
> and no one has complained of any inaccuracies.  But, as always, you are 
> responsible for verifying your results.
>
> Good luck,
>
> William Miller
>
>
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