Has anyone else noticed the CPC from the DP switch is green/yellow sheathed copper, yet at the shower it is a thin brown insulated cable?.. perchance there is a join?
Is that not just bare discoloured copper with no earth sleeving
Possibly 6mm/ 2.5 joint behind the tiles
I see what you mean, but if you zoom in close, the thickness appears to change close to the terminal.
CB - can you tell us if the thin incoming wire is indeed unsleeved copper or does it have brown insulation?