From the exteranl electric meter cupboard/incoming supply the wires run inside a stud wall to an internal RCD board in a small cupboard in my hallway.
This is very drafty.
I cannot insulate/plug any gaps behind the meter, so wondered if it is safe to carefully insulate around the RCD - obviously taking care not to disturb incoming or outgoing wires.
Planned on using rockwool fibre but concerned if it may cause overheating?
There is not eough room to insulate the cupboard door - have already thought of that.