The NEC values are for 75C, but not everything operates at that temperature
(167F), nor or all uses of wire under NEC codes. I understand why the
spreadsheet is set up for NEC since that covers probably 98% of all uses.
At room temperature (25C), the resistance values are almost 20% less - the
"standard" physics value of #10 AWG is almost exactly 1 ohm per 1000 feet at
26C.
http://en.wikipedia.org/wiki/American_wire_gauge
..................................................................................................
Northern Arizona Wind & Sun - Electricity From The Sun
..................................................................................................
----- Original Message -----
From: "William Miller" <[EMAIL PROTECTED]>
To: "RE-wrenches" <re-wrenches@lists.re-wrenches.org>
Sent: Tuesday, December 09, 2008 11:48 PM
Subject: Re: [RE-wrenches] voltage drop
Dear Wind & Sun:
What "standard" are you referring to? We are using the 75C values from
the NEC in order to assure code compliance. We need to have a direct link
to the NEC in case of compliance or liability issues.
Thanks for asking.
William Miller
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