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In the picture it looks like your supply wiring is smaller diameter than the 'internal' wiring of the shower. Possibly your wiring is under sized for the shower ampage. Seems like the breaker should have been operating too, maybe borderline but you would have hoped the breaker would trip with damage like that to the cable.
Airhead-
@Airhead
thanks this doesn’t surprise me at all. The bathroom is a shocker generally, built for HMO purpose. Once I have funds to build first floor extension, the bathroom is going above the kitchen, so really don’t want to shell out major cost to fix a legacy problem. combi boiler sited in bathroom too, another cock up really..
almac68
Highlight of my week..
My shower unit has been playing up for some time, finally packed in, build up of limescale, probably the cause.
Now electrically isolated. I’ve removed cover, on closer inspection the neutral feed has blown at the connector block, either the solenoid has seized or thermal cut off (TCO) switch has tripped. both completely sealed so can’t reset or clean out, given the age of the shower time for a new unit, at £60 not the end of the world to replace it. Can’t be arsed to order replacement parts.
Annoyingly there is no local water switch off in the bathroom.. is that even legal??, I will have to shut off supply at the water meter out front.
electrical feed will need testing, buried cable behind tiling, no sign of burn out at the isolator switch. Fingers crossed no major damage, otherwise it’ll be a chase out job as well. Wish me luck.
#firstworldproblems