Hello,
I recently had a kind of OHS and began to wonder. I kindly ask you for a factual answer, not laughing or showing how much more you know from me.
For the essence of the problem, we assume installation without any safeguards (differentials, etc.).
It is certainly the case that if we grip the phase conductor and our body is grounded, then due to the grounding of the N conductor, we will close the circuit and the current will kick us off.
1) Paralysis occurs at home and not so rarely - so it is certainly possible.
2) But how are we grounded at home? There are often ceramic tiles, wooden floors, parquet floors, rubber flaps etc. So how are we grounded if the resistance is huge.
3) If someone on 2) answers that sometimes the resistance is not so big and the circuit is closed, do they have a differential if I took the phase wire and just put it on the floor, would the differential work?
4) Whether in this whole matter can matter that between up. grounded concrete of the house, or grounded reinforcement of this concrete, and a man forms a capacitor, and since the current is variable (AC 50Hz) it flows through such a capacitor and despite the lack of grounding (insulating floor) the current can flow? If so, could such a current shock / be felt?
5) Since fuses, differentials and other electrical standards are in force in construction law / practice, why does the concrete not be lined with a thin layer of insulating rubber before laying the floor - eliminating (almost) the possibility of getting a human shock at home?
If anyone wants to write that such a topic has already been, unfortunately I have not seen anywhere answers to 3), 4) and 5) question.
I recently had a kind of OHS and began to wonder. I kindly ask you for a factual answer, not laughing or showing how much more you know from me.
For the essence of the problem, we assume installation without any safeguards (differentials, etc.).
It is certainly the case that if we grip the phase conductor and our body is grounded, then due to the grounding of the N conductor, we will close the circuit and the current will kick us off.
1) Paralysis occurs at home and not so rarely - so it is certainly possible.
2) But how are we grounded at home? There are often ceramic tiles, wooden floors, parquet floors, rubber flaps etc. So how are we grounded if the resistance is huge.
3) If someone on 2) answers that sometimes the resistance is not so big and the circuit is closed, do they have a differential if I took the phase wire and just put it on the floor, would the differential work?
4) Whether in this whole matter can matter that between up. grounded concrete of the house, or grounded reinforcement of this concrete, and a man forms a capacitor, and since the current is variable (AC 50Hz) it flows through such a capacitor and despite the lack of grounding (insulating floor) the current can flow? If so, could such a current shock / be felt?
5) Since fuses, differentials and other electrical standards are in force in construction law / practice, why does the concrete not be lined with a thin layer of insulating rubber before laying the floor - eliminating (almost) the possibility of getting a human shock at home?
If anyone wants to write that such a topic has already been, unfortunately I have not seen anywhere answers to 3), 4) and 5) question.
), this capacity is several dozen to several hundred picofarads. This gives a dozen microamps for 220VAC and 50 Hz. The neon probe is lit. As an example, I will give my colleague the following experiment - a 40W / 220V bulb in his fingers behind a threaded plinth touched to the output of a high power WCZ generator (100W transmitter several MHz) with a foot, thanks to the existence of this capacity, it lights up full. The current flowing through the body is imperceptible despite the value of several dozen milliamperes, due to the effect of "skin" at WCZ, but this is another "fairy tale".
