how to get this RCD right

[FlipFlopDude]

I got one of those double board consumer units with an RCD on each side. The left side has all six ring mains for the house, and the right side is for the lights, hob and cooker.

Here's the weird thing. So, whenever I plug something in and use power from any of the sockets on the left side, the RCD on the right side trips, turning off all my lights and the cooker, but the sockets stay on!

This happens with anything that uses a bit of power, like a vacuum cleaner, kettle, or water heater. I have an alarm system, but I completely disconnected it, and the problem is still happening.

Some of the MCBs on the left side were tripping the right safety switch too, so I've turned them off for now. Does anyone know what happened here?

 

[circleofdown]

I got one of those double board consumer units with an RCD on each side. The left side has all six ring mains for the house, and the right side is for the lights, hob and cooker.

Here's the weird thing. So, whenever I plug something in and use power from any of the sockets on the left side, the RCD on the right side trips, turning off all my lights and the cooker, but the sockets stay on!

This happens with anything that uses a bit of power, like a vacuum cleaner, kettle, or water heater. I have an alarm system, but I completely disconnected it, and the problem is still happening.

Some of the MCBs on the left side were tripping the right safety switch too, so I've turned them off for now. Does anyone know what happened here?

This is probably a neutral-to-earth fault or cross wiring between the RCD on each side. Gotta check the neutral wiring very carefully and actually not use shared neutrals between RCD zones.

 

[Deleted member 119]

Its not a weird thing, you have installed the unit incorrectly and have not tested circuits before installation,test all circuits and when you find the in connected circuits, repair and install correctly.
Or just put everything on one RCD