I was so glad the 110/220 was finally addressed in this thread. I'm a retired utility lineman and this has always been a problem. Also, talking about old voltages, my Dad, prior to WWII, owned a printing shop in NYC, and the voltage back then was DC, and the utility was converting over to AC voltage, came through, assessed what and how many motors needed to be converted, and as the sections of the city were converted, the utility had the motors replaced and any other conversion work was undertaken at the upgrade. He said it was quite a job that was done to convert it all over.