Earthing and Neutral

[josemi.rodriguez]

In a TN-S neutral system, can the neutral transformer be connected to the earthing of the transformer?
And a second question, the earthing of the transformer can be connected to the earthing of the building?

[gtpol57]

This may be usefull :

[link Point to another website Only the registered members can access] (especially post #9)

[gtpol57]

Supplementary :
To my opinion, as a general rule, if you have a total earthing resistance of about 1 Ohm, or less, you can bind all the grounding systems.
In any other case you must better separate them.
(A safe separation distance is 20 to 30 m).