So what would happen in this scenario ?
Wylex components.
TT installation
Main Supply into house >> 100mA TimeDelay RCD >> Switch fuses >> Consumer Units with single pole RCBO (e.g on socket circuit).
You get a N-E short on the socket circuit.
The RCBO trips, but can't isolate the N-E short.
Will the TD RCD then trip turning off the whole house? And presumably the main RCD can't be reset until the fault removed or that CU main switch turned off.
Wylex components.
TT installation
Main Supply into house >> 100mA TimeDelay RCD >> Switch fuses >> Consumer Units with single pole RCBO (e.g on socket circuit).
You get a N-E short on the socket circuit.
The RCBO trips, but can't isolate the N-E short.
Will the TD RCD then trip turning off the whole house? And presumably the main RCD can't be reset until the fault removed or that CU main switch turned off.