Gee thanks for the great tip Chris.... It never dawned on me to ever check the voltage at my fixtures.... ummm how would I do this? Should I stick the wires on my tongue to see how they taste or is there a meter or something that I could use? OF COURSE the voltage is checked at the fixtures! 11.3 is my fav. and I take great pride at 'engineering' my circuits to deliver as close as I can get to that. As for different voltage drop calculations and techniques, there are many different ones to choose from. The NS method has always served me well. I believe you will find that the Cable Constant they use in their method is different from the ones you use... it takes into account the AC circuit and the full run of the wire so you dont have to multiply the length by two Have a great weekend.