First of all I find the rating of components and wiring within showers leaves something to be desired and wonder how many actually comply
True, but then they don't have to comply with BS 7671. And neither does your mod, I guess.
Pulling a 1/4 spade off a tag, installing a piggyback connector and pushing original onto that or adding another ring crimp onto the threaded stud of a heating element in no way invalidates any warranty,
The small print almost certainly says it does, and if they're looking for a way to wriggle out, they will use that, even if the claim is that the knob broke off. They'll just say no, and leave you, or your customer, to try and find a way to fight that.
Apart from anything else it can so easily be reinstated before the word warranty rears its head.
True, but I thought we were discussing domestic showers - the householder won't want to have to do that before he can place a call, nor will he want to wait for you to be able to go and do it, and nor would you be keen to have to do it (I assume).
My experience of showers is that the majority have their isolators left permanently switched on [some people don't even know there is an isolator] so any realistic control of fans etc needs to be done from within the unit.
Trust me - you soon learn to use the isolator when it also works the fan - it's just a Q of making it a habit. All of us here occasionally forget to turn ours off, but it's pretty rare.
Thinking about it now a nice way to do this would be to fit a current transformer switch on the main feed, which could be anywhere including the CU, theres food for thought.
That would be a good idea.
