OP
- Reaction score
- 27
But the problem remains of flouting the regulation requiring concealed cable protection by 30mA RCD ...Thx. I forgot about the tails having to be no more than 3m in length. So the 16mm main supply to the remote CU needs a protective break in it to be within the 3m. Hence a fuse, which will also solve the selectively between the mcb's at the remote CU and 63A mcb at the meter.
It appears best, as been suggested, to remove all, to have a fused switch, so all tripable protective devices are in one location inside the flat. The sub CU has two RCDs. So no going outside (lockable cupboard) to see what the problem is, or setset an RCD. Also the RCD has to be checked every six months by the user, so needs to be accessible.