Forgive me if this has already been addressed or if it's just outright naive, but, are the issues of circuit breakers, house wiring and receptacles all moot if you're using a power regenerator like a PS Audio P12?
Power Cables and Wall Sockets
Without knowing for certain, it seems to me that power cables can only be as good as the in-home wiring coming to the wall socket. Is it possible that those who use expensive cables have improved the wiring to the socket? Or is the power from most wall sockets normally excellent, but is limited by conventional power cables?