Electrical - Romex Wiring and Other Recommended Enhancements

12/2 is sufficient for a 20 Amp circuit; 10/2 can handle a 30 amp circuit. 14/2 is only good for a 15A circuit. I would suggest running multiple 20A circuits with 12/2. Most important is to not have light dimmers, circuits that feed fluorescent lights / hairdryers, etc. on the same circuit.

You can also keep your audio circuits on the same buss bar in the fusebox to help mitigate ground loops. Put your noisy dimmers, etc. on the other buss bar.

cleeds1,367 posts04-23-2018 8:38am
Not necessarily. It depends, in part, on the length of the run from panel to receptacle. If in the US, check NEC.

You are correct; longer runs could require a larger gauge.  Always best to check NEC code.

lak3,062 posts04-30-2018 8:54amThere is absolutely nothing wrong with using 20 amp breakers as long as you run 10/2 wire.
Yes, there are preamps and amps constructed for 20 amp IEC’s, it is possible that if you use a 15 amp breaker the product might lack its full potential.
If you are going to use an HFC Hemisphere then I would suggest you use a Furutech GTX-D NCF (R) outlet and not the cruzeFIRST Maestro outlet to power the Hemisphere.

20 Amp breakers and 12/2 is also often acceptable, but as Cleeds1 stated, it is best to check NEC code if you have a long wire run.