I suspect a live wall, that comes down to the level of kitchen and bathroom furniture , washing machines etc is actually far more dangerous than a live ceiling, unless the ceiling is low, or the occupants are girraffes.
Ceilings and ceiling voids are a bit of a free for all regulation wise - cables in joists are regulated, cables between them less so.
If you are standing on steps to reach the ceiling you will not be so well earthed, Though I suppose some folk will stand in the sink to change the lamps.
However, it is not uncommon to see T and E skinned to the core by sharp metal edges and gorrilla installers, so there is some wisdom in adding RCD protection if it is practical to do so.
I suspect a live wall, that comes down to the level of kitchen and bathroom furniture , washing machines etc is actually far more dangerous than a live ceiling, unless the ceiling is low, or the occupants are girraffes.
Ceilings and ceiling voids are a bit of a free for all regulation wise - cables in joists are regulated, cables between them less so.
If you are standing on steps to reach the ceiling you will not be so well earthed, Though I suppose some folk will stand in the sink to change the lamps.
However, it is not uncommon to see T and E skinned to the core by sharp metal edges and gorrilla installers, so there is some wisdom in adding RCD protection if it is practical to do so.