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Old Jag Lover
Are you still using ring circuits in Britain I did an upgrade of an old switchboard from fuses to Arc Fault combo RCDs,thought the last guy had double tapped a few fuses but when my 9 yr old daughter who was helping me switched them on,KABOOM,took me a while to figure it out,she beat me to it,said dad why should power be on 2 wires when one is disconnected the the owner said the place was wired by a Scottish guy about 40 years ago we just split the circuits from 6 power to 12,6mm,Twin,in rmc,conduit used as earth just pigtailed to the earth screw,32A breakers for power 10A for lights 32 for stove and a few 20amps for hot water and aircon all three phase hager panel.400A main breaker old factory.200A on panel just marked it submain.