120 V 230 Volts mains, which is best?

[ppppenguin]

Going back to ring vs radial wiring. i haven't seen the 18th edition wiring regs but I think that rings are now deprecated. I think one reason is the addtional time and effort needed to fully verify a ring final when testing an intallation. A ring final will also carry on working with a break in the ring but is then liable to overheating. The standard circuits for sockets are now radials. 20A with 2.5m cable and 32A with 4mm cable.

An article on the pros and cons of ring finals. Hideous font: https://gadsolutions.biz/electrical-serv...n-good-bad