yeah for most things though 120 is more than enough and the plug differences prevent it as far as 220 being used in 110. I mean I was just explaining why you do not see it much. I mean its the reason for fuses. I guess the christmass lights thing used to be common enough to be warned against though. One of the rare times I looked into the total amps being supplied to my condo as I was contemplating an on demand water heater.