I would like to get an opinion on the best way to run 120V wiring along a long driveway. I'd like to have 3 recepticles along the way -- one at 250', 500' and 750' (the drive is about 850' long) each one used to power a LV xformer. My thoughts are to run these in series and i'd allow 600W (5Amps) for each transfer. So the first run would need to carry 15A, the next 10A and the last 5A. If i just use a voltage drop calculator...it says i need to run #4 for the first 250' then #6 for the next and then #10. Does this seem reasonable? Also i cannot seem to find specs on transformers as to what an allowable input voltage range they will operate with? Any help is surely appreciated.