The power supply itself does not draw that much power. That is a maxmum output number. A wattage calculator will give you a conservative estimate of how much your PC will really use. You should be able to run a few computers on a single 15A breaker circuit at your house (15A*120V = 1800 Watts).
Antec's free wattage calculator:http://www.antec.outervision.com/