OP
Engineer54
at 10.5 kw, pull switches are notorious for burning out, and a pig to connect 10mm. i would be inclined to fit a wall switch outside the room.easier to fit, and outside all zones.
As far as i can make out from the various posts i've read on this matter... Many Electricians only use ''Crabtree'' 50A pull switches on these higher rated Shower units that require 10mm T&E. According to them, 10mm cable is accommodated pretty easily... Plus they like the neon indicator being automatically disconnected when you drop the head unit....