Most of the U.S uses 110vac for regular appliances such as a hair dryer, kitchen blender, toaster, microwave, cat torturer, a stereo, tv or vcr, etc etc (and the TV's here recieve the NTSC signal. Not PAL!)
The LARGER home applicance such as large dish washers, refrigerators, clothes dryer or stove can (and usually do) use 220vac.
Westy