Earth Leakage Trip Switch tripping

[louiscribber]

Apartment is 8 years old

Up until 2 days ago, no problem with electrics.

I have a problem now.
When I turn on the water, it turns on a pump, to pressurize the water.

This causes the "Earth Leakage Trip Switch" to trip.

The pump does not turn off, and stays on until the tap is turned off.
Whatever circuit the pump is on is not affected by the tripping earth leakage trip switch.


When the tap is off, I reset the earth leakage trip switch.....and everything works again.


I wonder what might be causing the problem ? Any educated guesses ?

 

[holmslaw]

..

 

[PrenticeBoyofDerry]

Is your Consumer unit a split board?
Half MCBs protected by RCD and half not?

 

[louiscribber]

View media item 31317 View media item 31318

Thanks

Its the blue earth protection trip switch which is tripping.

What does "cross connection between the pump circuit and the one with the rcd" mean ?

What would cause a cross connection ? It worked for 8 years, and now its suddenly it trips the blue switch...

Could water explain the cross connection ?

 

[flameport]

It worked for 8 years, and now its suddenly it trips the blue switch...

In that case the pump or the wiring connected to it is faulty, and will need to be replaced.