Hi Guy's, revising an old issue here… I've got an 8.5kw electric shower, last December I changed the circuit breaker from a 16A to a 32A, hoping it would resolve the issue of the live wire (6mm thick) overheating and melting the plastic around it. Unfortunately I was wrong (not the first time i've been wrong), the red wire into the leed port has burnt out just the same way before I had changed the circuit breaker to a 32A? I've been replacing the switch, a 45A double pole. Every time I do so I lose a little bit of the wire, and i'm fast approaching the end before theres no more slack. I have been told in the past, an 8.5kw electric shower should really have a 10mm wire, but this is not really an option I have unless I tear the walls down. Here's what I suggest, to alleviate the problem of running out of wire and upgrading to a 10mm wire, can I attach a 10mm wire to the existing 6mm wire with a connector? Whats the dangers of doing this? Or some advise on what I can do pls - hopefully it doesn't include buying a 9.5kw shower!! Thx as always guys.