Well, I guess I am confused? I have an extensive collection of woodworking tools in my shop. Nearly 90% of them are dual voltage. In every case, the nameplate will list voltage and current.
As an example I looked at my drill press; the nameplate data is:
Voltage: 120/240 & Current: 12/6
My tablesaw is:
Voltage: 115/230 & Current: 15/7.5
Now, to me, that implies that if I double the voltage, the current draw is halved?
Yes, with a purely resistive load the relationship between voltage and amperage is directly proportional. If one increases so does the other proportionately. With an inductive load the relationship is inversely proportional; increase the voltage and you'll decrease the amperage...
So...am I missing something here?