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Mmmm, not sure I agree with you although "ground" is ...

much misunderstood term.

AFAIAC, the following methodology will fulfill electrical safety in any country and doesn't give you any ground loops, hum etc. in your system:
* use 3-core in-wall wiring which is active + neutral + earth.
* by all means use multiple spurs to power your total system but make sure the in-wall wires are all the same length (or you will get different earth potential at each component ... which can lead to hum).
* wall sockets have an earth hole/slit which is connected to the central household earth. In Oz that's back at the Consumer Unit ... and an earth wire goes out to a copper bar sunk into the ground.
* use 3-core mains cable to each component.
* inside each component, the earth wire in a captive mains cable (or the earth pin of the IEC socket) is bolted to the bare metal case - "safety earth".
* all RCA sockets & speaker BPs are insulated from the component case.
* PSes in each component have a star ground - but this is not connected to the case (and, hence, mains earth).
* the "system" ground is passed from one component to the next via the IC ground wire but it "floats" relative to the chassis.

All I can say is ... this works in my system.

Regards,

Andy


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