I had a Lincoln crackerbox in my old rent house and a 220v direct drive Sears 6hp/60 gal. compressor. The breaker box was in a closet at the other end of the house, but when you walked into the house, you walked right between the washer and dryer. I bought another dryer cord and a box and receptical that matched the existing plug and receptical. I basically made an extension cord with this that mounted on the wall next to the door to the garage. The new plug plugged into the wall outlet and the dryer plugged into this. I had mounted the new box to a 1x4 that ran to the back wall behind the dryer, up under the upper wall cabinet that hung on the wall. wired into the back of the plug and out a knockout on the side of the box was a piece of big romex that ran back under the cabinet, thru the wall into the garage and back to another box mounted on another 1x4 on the other side of the wall. The compressor also hard wired into this outside box and it got a recepticle that matched my Lincoln's plug. When I was in the garage and using the compressor or welder, I'd unplug the dryer, this let my wife know I was using the circuit. When I was done in the garage, I'd turn the compressor off and typically unplug the welder, go in the house and plug the dryer back in. If she had clothes in there that needed drying, she'd leave a sticky note saying so and I'd turn the dryer on as she'd already have it turned to where she wanted. Worked out great!