Firstly, how many amps come out of a North American electrical outlet? I vaguely recall reading 20A but I'm not sure.

To power an electrolytic cell, can I take an extension cord, split the two wires and plug it into the wall as a power source? How likely am I to electrocute myself if i don't use some type of DC converter to lower the amps. Could I also restrict the Amps by using a power cord from say a printer, or VCR instead of an extension cord? they have Amp outputs anywhere from 0.1-1A.