Perhaps you can shed some light on this condition for TNCS systems in the Irish Rules. I can only see that as RE decreases RB becomes more onerous but to be honest I am not really getting the essence.
Presumably that is the same international standard rewritten as a local regulation.
So does BS7671 say it’s up to the DNO to keep their PME network earthing resistance down sufficiently lower that their consumers earthing via intended and unintended paths to earth through supplementary electrodes and extraneous-conductive parts in contact with the mass of earth?
Whereas the Irish Regulations tell you what the DNO/DSO needs to achieve?
Presumably that is the same international standard rewritten as a local regulation.
So does BS7671 say it’s up to the DNO to keep their PME network earthing resistance down sufficiently lower that their consumers earthing via intended and unintended paths to earth through supplementary electrodes and extraneous-conductive parts in contact with the mass of earth?
Whereas the Irish Regulations tell you what the DNO/DSO needs to achieve?
