Since posting the above I have got abit more info. The electrician did not test the existing circuits before wiring them to new consumer unit and the RCD but confirmed it is a "fault "with the existing lighting circuit (for the main house) which could be down to wiring/electronics such as dimmer...
Hi
We are in the process of having a kitchen extension. This has resulted in the electrician replacing the consumer unit. The electrician has said there is a fault with the lighting circuit but has not wired it to the RCD. Is this acceptable?
Our worry is that it is not safe and need...