Audioquest NRG Z3 power cord

[audio_engr]

I am very sceptical to supercables and the advertisment for them. Audioquest state that :

"NRG-Z3’s Ground Noise-Dissipation System and direction-controlled Silver-Plated shield conductors efficiently drain RF noise from the line and neutral shields to ground via the third “ground” pin. "

My power cord is ungrounded in both end, that is this statement is not relevant for my connection. As I undertstand a power cable can be grounded in one end, both ends or it can be ungrounded. I have heard some say an ungrounded system gives the most open sound and other say it should be grounded on one side. Has anybody on this forum tested theses options?

And all these Cu qualities is realy hokus pokus for me. Maybe pure gold cables will give best sound?

Earth, or ground as you call it, is a safety thing and shouldn't be underestimated. If you have an internal problem with your amp and a phase touches the case, you can get electrocuted if you touch it. The earth connection takes that power away for you so you don't have to cop it. On top of that, there's the safety switch that will cut the power as soon as there's a current going to earth. Anything with a metal body (Fridge, oven, kettle, Devialet Expert!) HAS to have its earth connected.  Believe me, I'm an electrician. 

@Pim ... I have to agree with you that anything with a metal body MUST be grounded. I just a while back bought a DeLonghi Oil-filled radiator Room Heater and was super surprised it didn't come with a cable having a Ground terminal but only 2 pins (Neutral & Live) ...