Yo el, from you post, it sounds like this is maybe not the thing for you...so hire an electrical contractor.
First, the "commercial grade AC wire" doesn't make sense.
There is "AC Cable" which is 3 conductor - #12 in a flexible conduit. It is used in commercial construction but probably wouldn't sound any better than Romex (12-2 w/ground) and is not fun to work with especially if you don't have the right tools.
If you want to do it right, run 3/4" EMT (electrical metal tubing) conduit from the panel to the wallbox and pull in some #12 wire from a first-name manufacturer like Purist Audio, Cardas, Kimber, Tara, Synergistic Research, Shunyata or similar. 300 feet (six conductors times 50 feet)of the better grades will keep you broke for a while. Try to match whatever your PC (power cord) is in brand and quality. On reels or "by the foot" is not the way the above mentioned manufacturers like to sell their wire, but some will. If you have money to burn and want to use silver, send me some money and I'll burn it for you and then I'll tell you why you don't want to use silver...(it tarnishes). Copper is fine and cast long grain single crystal copper is best. Purist uses cast copper and that is what I recommend.
All runs should be continuous...no splices, should be grounded to the same ground buss bar, and be kept away from other power lines, electrical equipment, etc.
After you run the conduit, shove a 75' fish-tape in and push it all the way back to the panel. Put a piece of electrical tape to mark the length. Pull the fish-tape out and then measure it to the mark to get the exact length. If you cant afford the good wire now, then get 300' of #12THHN (100' x 3 colors, Black, White, Green) and freeze it in liquid nitrogen. Then allow it to thaw slowly in a freezer for 24-48 hrs and it will sound better than anything else for the price.
Have fun.
First, the "commercial grade AC wire" doesn't make sense.
There is "AC Cable" which is 3 conductor - #12 in a flexible conduit. It is used in commercial construction but probably wouldn't sound any better than Romex (12-2 w/ground) and is not fun to work with especially if you don't have the right tools.
If you want to do it right, run 3/4" EMT (electrical metal tubing) conduit from the panel to the wallbox and pull in some #12 wire from a first-name manufacturer like Purist Audio, Cardas, Kimber, Tara, Synergistic Research, Shunyata or similar. 300 feet (six conductors times 50 feet)of the better grades will keep you broke for a while. Try to match whatever your PC (power cord) is in brand and quality. On reels or "by the foot" is not the way the above mentioned manufacturers like to sell their wire, but some will. If you have money to burn and want to use silver, send me some money and I'll burn it for you and then I'll tell you why you don't want to use silver...(it tarnishes). Copper is fine and cast long grain single crystal copper is best. Purist uses cast copper and that is what I recommend.
All runs should be continuous...no splices, should be grounded to the same ground buss bar, and be kept away from other power lines, electrical equipment, etc.
After you run the conduit, shove a 75' fish-tape in and push it all the way back to the panel. Put a piece of electrical tape to mark the length. Pull the fish-tape out and then measure it to the mark to get the exact length. If you cant afford the good wire now, then get 300' of #12THHN (100' x 3 colors, Black, White, Green) and freeze it in liquid nitrogen. Then allow it to thaw slowly in a freezer for 24-48 hrs and it will sound better than anything else for the price.
Have fun.