Ah - I see now - when
you said that if I was banned "there would be much fewer personal insults, much fewer condescending remarks"
you meant that
you wouldn't be writing something like that any more.
Glad we've cleared that up.
in addition to your useful and helpful post, what do you suggest?
First I'd suggest that you take note of the fact that all I was actually responding to was sparcktikus' "
so can they be put on same mcb and note made on eic to keep everyone happy"
(Please note that the OP is refering to an actual circuit in a real house owned by a real customer. This is not a thought excercise involving only a copy of BS7671 and an internet forum)
On an actual circuit in a real house owned by a real customer a borrowed neutral cannot be left.
In a real house owned by a real customer you may not, IMO, claim to have exercised a professional level of skill and care if you have all the lights, or at least all of the lights covering the stair area, lost via the operation of one RCD, no matter what disclaimers you get the customer to sign or what notes you make on the EIC.
Emergency lighting would be one resolution, or providing a neutral so that the landing light could remain on a different circuit.
Disclaimers and EIC notes would not be a resolution.