I had a thread about this a while back where it was advised that I run a separate, dedicated line with surge suppression at the panel. Of course, I'm just repeating what people here with experience said, so take it for what it's worth! But not one thought a separate ground was remotely necessary.
FWIW: https://forum.audiogon.com/discussions/line-fault-at-the-outlet-do-i-need-an-electrician?sort_order=...
FWIW: https://forum.audiogon.com/discussions/line-fault-at-the-outlet-do-i-need-an-electrician?sort_order=...