OP
Engineer54
An all RCBO CU/DB be they SP+N or SP is by far superior to the common split 17th ed CU's or it's predecessors. They are to all intent and purpose, an industry cost effective compromise, that to my mind is not really fit for purpose. eg, ...a problem on one circuit can and will affect several other circuits.
Where a TT installation is involved, the RCBO's should be SP+N or DP.....
Where a TT installation is involved, the RCBO's should be SP+N or DP.....