That’s what I think. Do you think 16-gauge silver to be ok?
Of course! Like I said, if the wire really has to take any current you have much bigger fish to fry due to some sort of Bad Thing going on with a component or AC outlet miswired. When things are set up properly the wire will see no current at all.
Now I feel compelled to mention that if all the equipment has a proper grounding scheme and your home wiring meets electrical code there will be no benefit whatsoever from any external grounding systems. But its a sad fact that many ’high end audio’ components have poor grounding (or none at all).