Mike, I was more interested in the runs from the transformer to the other end of the layout. I'm building a 20 x 12.5 layout, and I figured #14 was sufficient, but I don't think I'd have considered #16. I figured there would easily be 25 foot runs, and dropping 2 volts is a bit too much. With #14, my maximum voltage drop is: 1.26 at ten amps, I can live with that, typically I'll be drawing more like 5 amps, so the drop would be half of that.