"IMHO we need to return to proper earthing and cease new PME installations.
In built up areas, 4 core mains with the armouring providing a metallic earth path back to the substation. This armouring to be additionally earthed by local earth rods at each consumer, where possible, and by earth tape at joints in addition.
In rural areas, TT with a requirement that new installations have DUPLICATED RCD/RCBO protection. E.G. each circuit on an RCBO and with a from end 100ma time delayed RCD to give a second line of defence.
"
I agree. If possible a different make and also in a slightly different location (mainly "stiction" and damage issues) although usually not practical.
You would need to ensure the 30mA RCDs (RCBOs/RCCBs) auto switch on the N pole too).
"IMHO we need to return to proper earthing and cease new PME installations.
In built up areas, 4 core mains with the armouring providing a metallic earth path back to the substation. This armouring to be additionally earthed by local earth rods at each consumer, where possible, and by earth tape at joints in addition.
In rural areas, TT with a requirement that new installations have DUPLICATED RCD/RCBO protection. E.G. each circuit on an RCBO and with a from end 100ma time delayed RCD to give a second line of defence.
"
I agree. If possible a different make and also in a slightly different location (mainly "stiction" and damage issues) although usually not practical.
You would need to ensure the 30mA RCDs (RCBOs/RCCBs) auto switch on the N pole too).
