a kitchen island needs power to it for a double socket, apparently it has a flex with a plug on it, and you just need to plug it in somewhere. and as it'a an island it would mean pugging a socket in the middle of the floor. at the minute theres a blind of concrete on the floor, there is going to be 100mm insulation, underfloor heating pipes and then a 50mm screed on top. which will get quite hot, so obviously this will derate the cable alot i'm thinking it'd probably be best to run the cable from a FCU on the ring in probably 4mm in conduit to the floor socket but i havent done any calcs yet. how hot does underfloor heating get? will a normal floor socket be alright with the heat?