Here's a bit of a brain teaser for you guys.
My geyser just suddenly started tripping the earth leakage.
Thermostat and element replaced, no change.
Removed isolator at geyser to see if that's faulty, no change.
Wired a lamp straight into the power before the isolator, still trips.
Switched breakers in db, still trips earth leakage.
During all the testing the only thing I didn't disconnect was the earth wire, running to the geyser.
So it's got nothing to do with the geyser, isolator or wiring between isolator and geyser.
Any ideas? Getting a sparky to come look tomorrow....