WHEN I first did a dedicated lines they were 12g. solid to 20 amp. switches, at the ic end they were pigy backed to the 2nd ic.Reading other post here on audiogon I changed the whole thing with stagering results and to any considering this should start off the correct way .
Seperate box with ceramic fuses, use the 35 amp they are bigger and well handle monoblocks. I chose 8g braided 3lines one for hot,nueteral and ground since i have 2 ic i have 6 lines this is dedicated, don,t let your electician pigy back,.
I think garfish brightness is due to switches ,fuses well be consideribly smoother, a lesson learned the hard way
10 g is minnimum for dedicated lines
steve