Are there any over-long extension cords that you rolled up in a neat loop to 'hide' from sight???
If so, unwind it, it'll do all kinds of nasties plus it's a MAJOR fire hazard....
Although we're all taught you can use upto 10Amps from a household outlet, the fuses/circuitbreakers are rated at 15-16Amps, So there's a little headroom to draw 11-12Amps although the house wiring might be 10Amp or 16 Amp rating which will be an issue.
Also to note, Houses are wired as 2 fused circuits for general outlet power. (Lighting, Hot water service, Kitchen Stove all have their own fuses).
Typically, the mains wiring for a house is split down the centreline of the house.
So, all the LEFT side of the house is on 1 fuse/breaker, and all the RIGHT side is on the 2nd mains fuse/breaker.
By using a power lead from both sides of the house offers you more grunt (20Amps) to play with.
You might want to wire up 5-10 pinnies on the 'left' outlet, and 5-10 pinnies on the 'right' outlet......
I went through all this trying to balance out my lighting load for Xmas lights, i use a lot of floodlights that soon exceed the 2400-3000Watts available.
If you're lucky to have converted your Kitchen stove from Electric to Gas, then you also have a 32Amp 'Stove circuit' free to run into your games room and run 50 pinnies on it (which is what i do for Xmas stuff).
( your gas oven only needs 2/10th's of bugger all for the spark-igniter, and can be plugged into a standard outlet in the kitchen).
Get a sparkie to confirm all the above
MM.