Applying singles just isn't really likely to occur inside a domestic condition, It might be perfect for conduit down the walls but an absolute nightmare to run the rest of it in conduit less than floorboards etcetera. For 6mm2 T&E, I might likely use individual 20mm oval conduits, a single https://round-conduits78990.bloggosite.com/33819785/rumored-buzz-on-round-conduit