Hi, designing my first small installation which i will be using for my first assessment with Elecsa/NECEIC etc ( any thoughts on which way to go appreciated). Installation is in an oak wooden framed and mostly glass conservatory with instruction of no visible wiring please! The obvious way of running the majority of the cables is under the floor. Floor construction is concrete pad then approx 100mm insulation 25mm ply, 25mm solid oak boards. Initially was thinking of channelling out top of insulation and running cables under ply/oak . Would 25 mm of ply and then 25 mm Oak flooring be considered a thermally conductive surface (ref 102). Given the nature of the room i can imagine very high ambient temps at floor surface. If i lay cables under insulation, as the builder would prefer due to time constraints, would the pad be considered a thermally conductive surface. It is just conventional poured concrete over compacted hardcore. I guess this will reduce ambient temp factors as well?