Which TN-C-S or TT grounding system to choose?
IN A PRIVATE HOUSE IN A SHIELD, THE EARTH IS SEPARATELY FROM THE STREET, AND THE PHASE AND ZERO PASS THROUGH THE RCD TO THE BOILER, according to the tn-cs SYSTEM, it is said that it is better to connect the input zero and the ground block so as not to suffer from a zero break, AND IF THE LEAKAGE IS LEAK OUT WILL THE BOILER ARE ZERO PRESENT ALSO ON THE HOUSING SO LIKE TIRES CONNECTED? OR BETTER DO NOT CONNECT, LEAVE TT.
But what about the fact that “zero will be present on the case”? You do not know that zero is grounded in TN by definition? Based on this, I don’t understand what you are afraid of?
TN-C-S is recommended because you re-ground an already grounded zero, after which you get full N and PE conductors, and PE will continue to perform its function no matter what.
TT is recommended if the line from which the input is in poor condition, which is often observed in the private sector with old high-voltage transmission lines, for example, in order to protect against equalizing currents flowing through your ground electrode system.
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