333rocky333 said:You still have me baffled. Is this batch of bad grammar and abbreviated words supposed to mean something?
Well, I didn't use any abbreviated words and I take a lot of care with my grammar, for the sake of clarity if nothing else. I only meant that just because the macro photo of the DP switch appeared to have fatter wires than the further-away shot of the shower, it didn't mean they were different sizes.
As I said, I didn't mean to offend you, it was just a light-hearted aside based on the *classic* Father Ted quote: "This cow is small, those ones are far away".
I hadn't appreciated the nature of the exposed copper at the shower. It may be that the wires are in fact different. I'm confused as to why even the incompetent that installed the shower would switch between 6mm² and smaller cable behind the tiles. To join them would require the tiles to be off, so why do it?
Softus said:It hardly even matters whether or not the cable behind the wall is 2.5mm² - it has to be replaced anyway.
Indeed. However, if there's a change in cable between the 14mm wide that disappears under the bath and what you believe to be something else at the shower terminals, it's unlikely that it could just be pulled out with attached 10mm² following. The need for rewiring is not in doubt at this point, it's the mechanics of it.