Transmission of 3.3v

[JohnRob]

@MarkT

If you use wire diameters (or areas) you only need to memorize the resistivity of copper which is about 17 nanoohm-metres. Resistance/length = resistivity/area.

You are of course correct. However for me I like the 1000' #10, 1 ohm as I can do the calculations in my head.
I do wish there was a metric equivalent though.