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.
So this stops you having a installation earth electrode with a resistance equal to or less than the resistance of the distribution network electrodes, is that to stop the consumer installation earth rod becoming the primary network earth with the possibility of associated diverted currents.
20/0.2631 = 76 ohms minimum consumer earth rod resistance.
So this stops you having a installation earth electrode with a resistance equal to or less than the resistance of the distribution network electrodes, is that to stop the consumer installation earth rod becoming the primary network earth with the possibility of associated diverted currents.
20/0.2631 = 76 ohms minimum consumer earth rod resistance.
