UK on the other hand has the following in its distribution network
TN-S (Terra Neutral - Separate) mainly on older installations, has a live, neutral and earth all the way back to the transformer
TNC-S (Terra Neutral Combined - Separate) - Earth and neutral are the same within the supplier's network but separate within the customer's installation - so basically similar to yourself, but instead we only have single phase rather than 3 phase like many European continental countries so operator side is 2 conductors, household is 3 conductors. Often this has Protective Multiple Earthing aka PME where the supplier "stakes" the earth to neutral along the supply run, which drops the earth loop impedance massively. Badly understood though and many sparks still think you can't use a PME earth with an outbuilding and you have to drive an earth rod instead, you don't but its so pervasive that folk won't be told and won't listen even when you quote the relevant regulation from BS7671....
Biting the hand that feeds IT
