Dedicated power

If you're going to install dedicated lines, use 20 amp circuits rather than 15. You would use 12/2 wire for a 20 amp circuit, unless you do a split duplex, in which case you could use 12/3.
Some people may suggest you use 10/2 wire. I would be careful about doing that. More likely than not, the receptacles you use will not be rated for use with 10 gauge wire. It would be a fire hazard and code violation.

10/2 will be more than sufficient ........

Heads UP! i have done this and learned a great lesson. Make sure all your wires are same length, exactly! If you run any diffrent, you will get a ground differential and have to externally ground all your equipment from one piece to another. Additionally, if you terminate yourself, you can be sure that nothing is nicked, scratched or etched when removing insulation. Next step, which will be the most life changing experience you could have, go solar. Its amazing the difference in sound when you use photons and voltage inverter, directly into your system...best wishes...you are almost there...

I had my electrician run me a sub panel(8 breakersX15a) for my system.
All eight of my outlets are wired with 10 gauge.Then I had him give me 2X240v for my 20a and 15 Balanced TorusX2.I've
heard 10 gauge was the way to go.I couldn't be happier.

You can get most of the benefit of dedicated lines, especially for lo-current equipment by use of a large isolation transformer.