Double pole switch on shower

[jungaju]

I have a Mira Advance shower 3 years old and it has stopped working. There is power to the d/p switch but nothing on the shower. After ringing Mira and being assured that the fault is not with the shower i turned off the fuse to the shower to take a look in the switch. Even with the shower turned off at the fuse box every time i touched the internal parts of the switch with my screwdriver the whole house's electric tripped off. Does anyone know if this is a fault with my wireing or the switch?

[mac309]

Sounds very much like the switch is faulty, if your house is protected by an earth leakage trip this would explain why it trips when you touch the switch with a screwdriver as it would detect neutral currents passing through the screwdriver and the metal box.

[Tweed]

Yup, a neutral to earth will trip the trip even if the fuse is out. Sounds like a faulty DP switch.