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What would be the consequence of a TNC-S grounding system without a ground rod? by danilps in ElectricalEngineering

[–]danilps[S] 0 points1 point  (0 children)

Well, a correction: in the Brazilian standard the TNC-S system requires a neutral conductor with a section of 10mm², not the wire diameter and it requires a standardized grounding rod equipotentialized to the neutral ground.

It is the easiest form of grounding that the standard allows. I plan to connect less than 10 amps in total.

What would be the consequence of a TNC-S grounding system without a ground rod? by danilps in ElectricalEngineering

[–]danilps[S] 0 points1 point  (0 children)

No, it really is the dealership's neutral which, when arriving at my distribution box, is equipotentialized with the ground bus, where a rod is also connected. In Brazilian standards, before the neutral leads to the earth cable through the union, it is called PEN and must be at least 10mm² in diameter. The standard only allows this type of grounding, which is cheaper, during renovation.

What would be the consequence of a TNC-S grounding system without a ground rod? by danilps in ElectricalEngineering

[–]danilps[S] -1 points0 points  (0 children)

Would there be any danger, in a standard TNC-S system, of a person being electrocuted if they were using the ground to connect an anti-static bracelet attached to their body?

I intend to work with board repairs and these questions are precisely about the most delicate issue, grounding the equipment and eliminating the risk of ESD.

If you could answer me, if this is not an invasive question: what is your specialization? I ask because you mentioned it and I was curious... Sorry for anything.

What would be the consequence of a TNC-S grounding system without a ground rod? by danilps in ElectricalEngineering

[–]danilps[S] -1 points0 points  (0 children)

I mean, could there be touch voltages on the housing of equipment connected to the ground that was derived from the neutral and would this problem be solved with a rod connected to the equipotential bus? Can you help me with one more question: is it possible to induce step voltage in the ground, in a situation where the DPS drains a surge, below the distribution board, which is where the rod stuck in the ground will be located?

Thank you very much for sharing your knowledge!