Any folks know 220 wiring ?

Grassy:

How far is the dryer outlet from the area you want to run the compressor in?

You can simply buy a plug that matches the dryer outlet, a length of 10/3 SO cord & a cord cap that males with the 20 amp plug on that compressor.

Unplug the dryer, plug in the cord & blast away. I doubt the dryer runs all day everyday. Just clean the laundry room up a bit when you are done. You should clean behind the dryer anyway.

Now before the NEMA-nancy's start to whine... I am aware that the 30 amp dryer breaker will not properly protect the 20 amp device on the end of that adaptor cord. Most portable compressors are equipped with some sort of thermal overload, so the only thing in that setup "at risk" is the cord cap & plug. If the cord cap or plug were to overheat, it would require a direct short to open the breaker.

Not much of a risk in this case because the connection should be well outside the house & in plain view. The cord itself will have enough conductor area to be safe.

B.