[RE-wrenches] Wire sizing calculator online

[William Miller]

Carl:

You are very welcome.

I'd be willing to provide a metric chart.  I need some information to get 
started.  In the US, practices are dictated by our NEC which provides the 
resistance values for standard wire gauges.  By putting the values in the 
Code, it gives all parties a reference and (hopefully) avoids arguments 
about conflicting data.

I downloaded the New Zealand Electrical Code of Practice (NZECP 51:2004) 
and did not find in it any resistance values.  Is this the correct document 
to look in?  Are resistance values in there and I am just not finding 
them?  If the values are not in the NZECP, where do professionals in New 
Zealand look for the resistance values?

There is a slight difference in resistance (impedance) between AC and DC 
circuits as listed in the NEC.  I used the higher values to allow 
conformity in all cases.  Let me know if there is a different consideration 
for AC versus DC in New Zealand.

Do you know what other Metric based nations use for determining wire 
resistance values?

Thanks in advance.

William Miller


At 04:32 PM 2/3/2013, Carl Emerson wrote:
>Hi William,
>
>Just a comment on the spreadsheet.
>
>You have made provision for Centigrade, being friendly to those outside USA.
>
>It would be nice to have reference to wire cross sectional area in mm² as 
>AWG is foreign to lots of folks from outside the US who reference your site.
>
>I must say that your making information freely available over the years 
>has assisted many.
>
>Regards
>Carl Emerson
>
>fcb06a.jpg
>
>  022 630 9689
>  <mailto:carl at solarking.net.nz>carl at solarking.net.nz
>  solarking.net.nz
>  PO Box 305-130,
>  Triton Plaza,
>  Auckland 0757
>
>
>----------
>From: re-wrenches-bounces at lists.re-wrenches.org 
>[mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of William Miller
>Sent: 4 February 2013 12:06 p.m.
>To: RE-wrenches
>Subject: Re: [RE-wrenches] Wire sizing calculator online
>
>Todd:
>
>Thanks for the plug.  The copy you have is outdated.  Here is where you 
>will find the new and improved 
>version:  http://millersolar.com/MillerSolar/Resources/_Resources.html
>
>What we created in the Miller Solar wire sizing spreadsheet is an 
>opportunity to compare the voltage drop for all common wire sizes in one 
>view so you can evaluate the tradeoffs for various scenarios.
>
>Questions or comments are appreciated.
>
>William Miller
>
>
>
>At 09:54 PM 2/1/2013, toddcory at finestplanet.com wrote:
>
>
>thank you... this is useful. do you have william millers calculator too? 
>its attached in case you dont.
>
>
>
>todd
>
>
>
>
>
>
>
>
>
>On Friday, February 1, 2013 5:23pm, "Solarguy" <ntrei at 1scom.net> said:
>
>I stumbled onto this wire sizing calculator that gives NEC qualified data.
>Wikipedia had a link to it.
><http://www.cablesizer.com/>http://www.cablesizer.com/
>Jim Duncan
>North Texas Renewable Energy Inc
><http://www.ntrei.com/>www.ntrei.com
>NABCEP PV 031310-57
>TECL-27398
><mailto:ntrei at 1scom.net>ntrei at 1scom.net
>817.917.0527
>NABCEP Logo
>
>
>
>
>Sent from Finest Planet WebMail.
>
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