Do the math, watts\Volts so a 1000 Watt HPS on a 120Volt circuit is roughly 1000/120 8.33 AMPS (Plus what the ballast draws).....Thats more than 1/2 of a 15 AMP circuit.. Lady Vapor is right, use a 12 Gauge cord, put it on a 20 AMP circuit if you can... COOL down your ballast..Blow and suck off as much heat as you can..Its scary.. I worry about it all the time... But I have not heard of anyone having a fire yet.. but I am sure it happens...People over loading their circuits, people try to plug alot into a wall..