Hi guys, for my first post I’m looking for some advice on wiring a ring for a large living room. The room is 11m x 5m, the floors are concrete, so the cable runs from the CU (32A MCB) to the 1st floor, through 2m of insulated cavity wall (all cables are bunched) and along insulated plaster board ceilings, there are 2m drops to each socket (of which there are 8 sockets), the total ring length will be approximately 70m. I’m a little confused as to what cable should be used, 2.5mm or 4mm, based on voltage drop, derating etc? I’d be grateful for any info. Thanks