For most amps one 20/30 amp line is generally ample (keep in mind that a 30 amp outlet requires a different plug and outlet rated for 30 amps to meet code), two dedicated lines on separate breakers will be even better. You will have twice the breaker contact area on the service panel's bus bar, and effectively isolate the electrical demand and ground for each channel. Whether they should be from the same phase or one from each phase is something you will have to experiment with. This can sometimes introduce hum. I have two dedicated 20 amp lines for my amp(s) using 10 ga. Romex, and run a line from each leg/phase by using a 2 pole breaker at the service panel. This set up has worked very well with a pair of Bryston 7B STs, and now with a Classe Omicron. For what it is worth, I find the two phase aproach to sound more dynamic, although a smidge leaner then using a single phase.
monoblocks: one dedicated line or two?
I am running monoblocks amps and am thinking of inproving the wiring to them. Is it better to run a single 30 amp line to both or is it better to run one 20 amp dedicated line to each? I wonder if there aren't some grounding coomplexities that I odn't understand here that may favor one setup over another. I am not that crazy about shelling out for a powerline conditioner on each line
Thanks for your help
Thanks for your help