have a dedicated line for my Krell FPB 600 amp and my ARC Ref 6 preamp which i will be adding the Furutech GTX-d r. But not for my Rega Isis cdp. Would you also recommend a dedicated line for the cdp too?
It would make sense to add a second 20 amp dedicated line. You can use your CDP, and in the future add another digital device such as a dac or streamer. It’s best to isolate analogue from digital.
Or you can keep the 15A line as long as it is properly grounded at the receptacle and at the circuit panel.