I saw a european house panel that had its' neutral and bonding terminals changed for gold plated copper busses that was only $3000. The reseller called it an audiophile panel. The breakers were rated for Euro voltages ie 220/440 and if I recall it was like a 12 circuit panel. I doubt the normal retail is anything higher than 2 or 300 Euros. Even the gold plated copper buss can't cost more than a hundred Euros. So the %600 markup is pretty sweet. I wonder if they use high purity oxygen free AC cable too.
As far as code goes the neutral is black and the single phase conductor is red. I guess just to be consistent the grounds were probably green with a yellow stripe.
I think most of this stuff is a race to brag about who spent more on their audio systems because nobody can even hear the difference.
