i used 10-2 gauge cable steel sheath. You want to use steel not aluminum. Atkore makes a great product. Not sure if you will need the isolated ground or not. I did not. Atkore 10-2 ran about 750 dollars for 250 feet. Quality cable is important, as much as the dedicated line itself. Don’t want the Romex quality stuff and also you don’t want to bend it either. Hopefully you can keep the integrity of the cable intact. Of course this only works if you have the power in breaker box for an additional 20 amp. I think all in the job was about 3k including the 750 dollar cable.