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I'm not totally convinced

Andy, perhaps I haven't done the experimentation you have.
I can see the potential value of separate circuits - for keeping digital noise away from analogue components etc - but the super sized fuses I'm not too sure about. I wouldn't be too comfortable using such large fuses.
A fuse is there for protection - to limit damage or fire risk in fault situations. If the component doesn't require a large value - ie no risk of ever tripping a 20A fuse even on high power transients - what's the point of using 32A? (this would be equivalent to using a 64A fuse on a 120Vac US line). The larger fuse is highly unlikely to alter the impedance characteristics of the AC line, but it will certainly afford you less protection.

This is a different issue to providing a decently low impedance cable feed (or shielding etc). I'm using 6mm² cable (~9AWG) over a 12m run from the fuse panel. What gauge/cable type are you using with those 32A spurs?

BTW, I thought the local sparkys did use rings, since it allows you to use lower gauge cable? Wouldn't know for sure. Most modern houses I've checked use 16A fuses for common power circuits.


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