Ok i have replaced a 8.5kw shower with another 8.5kw shower. its running on 10mm cable, on a 40amp mcb, the isolation switch is 45amps.
When the shower was replaced, the rcd on the cu kept tripping the instant it was turned on. So after looking about, the isolation switch was found to be a bit dodgy and replaced.
Heres where the fun lies, the old isolation switch had two connection points for earth from both supply and load. The new one has 1 point, that both have to be pushed into.
With both earths connected to this single point, the rcd instantly trips the second the shower powers up. With either one or the other connected it doesnt trip.
Its current state is that the mcb is off, and the the supply earth is connected to the point, the isolation switch is off with the pull cord for the switch removed to stop anyone using it.
So what now ideas? suggestions ? or is it now time to call in a sparky?
When the shower was replaced, the rcd on the cu kept tripping the instant it was turned on. So after looking about, the isolation switch was found to be a bit dodgy and replaced.
Heres where the fun lies, the old isolation switch had two connection points for earth from both supply and load. The new one has 1 point, that both have to be pushed into.
With both earths connected to this single point, the rcd instantly trips the second the shower powers up. With either one or the other connected it doesnt trip.
Its current state is that the mcb is off, and the the supply earth is connected to the point, the isolation switch is off with the pull cord for the switch removed to stop anyone using it.
So what now ideas? suggestions ? or is it now time to call in a sparky?