Grounding cable gauge size

Fascinating. 

Which model was it?

I'm interested in the Puritan Audio Labs - The Ground Master but it's impossible for me to have an additional Ground Rod as I'm on level 6 of a 35 story apartment complex.

Somehow I'd like to have a one way system so any noise in the building's ground can't contaminate my system.

Any ideas?

pedroeb:

I think your situation is exactly what these boxes are for.

Ozzy, the Entreqs did not have plates in them? I assumed, as they state, a battery-looking device that collects voltage in reverse of how a battery with cathode and anode plates works.

I would say my boxes should be reworked with a more conductive media like graphene or powdered carbon.

Puritan has a model designed specifically for apartments that doesn't have an external grounding rod.