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.
1. No LV net has both TT and TN* customers. I'm not sure that's always the case in Germany, but I infer it's typical given that I've seen pages about a "network" (i.e. its customers!) all changing from one form to another: e.g. TT-TN or TN-TT). Imagine a DNO in the UK suddenly requiring that!
Certainly not the case in the UK. Even a single customer can present mix of TN and TT - e.g. my house is TN but the detached garage, connected to the same supply, is TT.
1. No LV net has both TT and TN* customers. I'm not sure that's always the case in Germany, but I infer it's typical given that I've seen pages about a "network" (i.e. its customers!) all changing from one form to another: e.g. TT-TN or TN-TT). Imagine a DNO in the UK suddenly requiring that!
Certainly not the case in the UK. Even a single customer can present mix of TN and TT - e.g. my house is TN but the detached garage, connected to the same supply, is TT.
