I've been in the trade for some time but have never had to calc loads. I am trying to figure the load for several portable buildings which will be joined into one. There is kitchen equipment, all of which is 120v, lighting, and an a/c unit on each portable. I have most of the data I need but am confused on a couple points. I have added all the nameplate ratings, figured the va for lighting and receptacles, but now I'm stumped. Do I convert everything to va then to amps? is there a difference in the 240 and 120v calcs? ALL help is appreciated