Grounding cable gauge size

General rule of thumb is ground wire is at least the same gauge as the supply wire. 1600.00 for a ground wire is stupid. And I’m a cable believer…

Ah, no current then pretty much anything would work. I would use OCC copper personally. But silver would be fine.

Try both. A 1600.00 ground cable is just too much. Not money, just stupid. Try both silver and copper, or any other. Make a good connection, which is ALWAYS a must with any ground and see which you prefer.