And, of course that varies from country to country. Since the U.S. has a lower voltage, it has to draw a higher amperage to do the same job. As John in Kansas points out, the amps in most of the answers above apply only to the UK.

But generally, you can put all the computer stuff one individual could want to use on one household circuit. It may require a separate circuit for some high-performance laser printers.

I'd recommend that you don't use high-amp appliances like toasters and microwaves and vacuum cleaners on the same circuit. When my wife turns on the vacuum when I'm using my computer, I think I may have grounds for justifiable homicide.

-Joe Offer-