Is it OK to route the 10mm cable from a cu to a 8.5 kw shower switch vertically through a 3-4 inch thick studded partition wall which is part of the shower cubicle, by using holes through the noggins and enclosing the cable in metal conduit (22mm copper tubing actually). My concern is that the cable will be within two inches f the surface on both sides, there will be no indication on the surface that the cable is there and finally, protection in fairly close fitting tubing could create over-heating problems in the cable.
Would appreciate some advice.
Would appreciate some advice.