The voltage on the pin - damaged installation or extension cords?

Hello,

At the beginning, I apologize for the lack of professional language, but I don't know much about electricity ...

In short, it looks like that when you connect several electrical devices on the extension cords - voltage appears on the pin on the extension cord - the screwdriver for checking the voltage lights up. It does not matter what specific devices I connect - it does not matter how many extension cords I use - with two - three there is voltage, sometimes when connecting only one extension cord. I thought it was a problem with the installation, so I unscrewed the socket, replaced it with a new one and disconnected the ground wire for testing - still the same.

Therefore, I have a question - is it the fault of the installation or extension cords in this situation? I prefer to make sure before throwing them all out and buying new ones - extension cords, mostly with filters, from the mid-range price range. Or another question asked - if after disconnecting the grounding socket, there is still this problem on the pin on the extension cord, it means that it has nothing to do with the installation?

What else I noticed in the installation - it can be useful for problem analysis:

- the installation is about 6 years old
- copper wires
- there is a differential that turns everything off
- there is also voltage on the ground wire in 3 cans - but they are not related to these electrical sockets (I checked it by turning off the fuse responsible for these boxes - there was still electricity in the sockets)
- nothing like that happened before, only about a month ago I felt an unpleasant tingling when removing the plug when I touched the pin

These screwdrivers are not generally good for such measurements, so the measurement may be falsified. It would be best to check it with a voltage indicator that forces the flow of more current, which excludes various types of leakage, etc., false measurement.

If you have disconnected the pin from the socket and you have voltage on the `` pin '', it means damage to the extension cord, or an induction may occur.
What difference? 30mA? The current on the "pin" may be so small that you can feel it, and for the differential it is too small to turn off the circuit.
I understand that the voltage on the `` pin '' appears without any devices connected ?!
Coiled or unwound extension cords when checking with neon lights !?

Buddy tomoman, problem with the N cable. It's strange only that the differential does not crash you. Installation is control. Such symptoms should not be underestimated

Quote:

but I don't know much about electricity ...

And someone advises you to rummage in cans ...
Call an electrician because your experiments may end badly!

Perhaps one of the devices in the installation is causing the problem. Disconnect all devices and check again, it is strange that the differential did not work (probably the operating current is too low), it is best to check the voltage and current with a meter on the pin, then you can look for a further cause.

Thank you all for the answers - I am completing the data:

- I measured with a meter - voltage between 9 and 10 V
- extension cords unfolded - the voltage on the pin appears regardless of whether the devices are connected or not

After tightening the wires on the strips in the switchgear.
Connect a 15W or 40 bulb between the phase and the pin, whatever you have at hand, as the differential will turn it off, ok.

Quote:

measured with a meter - voltage between 9 and 10 volts

These are stray currents with a value of microampere, so the neon lamp is lit, the meter shows 10V and there is really nothing there

As I understand PE - is it a grounding conductor? In one box there are two such wires that are not paired with each other as in other boxes. This could be it?

tomoman wrote:

As I understand PE - is it a grounding conductor? In one box there are two such wires that are not paired with each other as in other boxes. This could be it?

I do not know what you have in the installation, do this test with the bulb as above. All PE should be connected, maybe this one is not connected anywhere ...

PE is ground, yellow green ....

lubamet wrote:

These are stray currents with a value of microampere, so the neon lamp is lit, the meter shows 10V and there is really nothing there

Do I know - touching the pin is not pleasant, the feeling of tingling in the finger and temporary "sticking" ...

tomoman wrote:

lubamet wrote:

These are stray currents with a value of microampere, so the neon lamp is lit, the meter shows 10V and there is really nothing there

Do I know - touching the pin is not pleasant, the feeling of tingling in the finger and temporary "sticking" ...

It can't be 10V then
Something stinks about this installation or your measurements.

Is it like this in every outlet or does one have such symptoms? Maybe this will clear things up.

tomoman wrote:

It does not matter what specific devices I connect - it does not matter how many extension cords I use - with two - three there is voltage, sometimes when connecting only one extension cord.

And here you have the answer.
In owl practice, I have met an extension cord that had a pin and a suitable plug, and in the cable only 2 wires (extension cord from the supermarket)
and I suspect that is where the problem is.

tomoman: disconnect from the mains all devices with earthed plugs and check what is happening on the PE conductor - just like you did so far. If the symptom has resolved, search by connecting the receivers one after the other - I put on the stove - if the PE pin still has disturbing symptoms, the cause is in the fuse / connection board. Poor connection of N conductors between the apartment installation and the power supply system.

With these devices and extension cords I give up - there is no rule in it - when it seems to me that I found a faulty device / extension cord, it is the same. Oh, the whole thing is only in 3 sockets in the house, but beware - if in the one where I have everything connected, I remove the plug, then the phenomenon does not occur in the other ones and it seems okay.

I tweaked the cables on the strip, they were not loose anyway.

tomoman wrote:

With these devices and extension cords I give up - there is no rule in it - when it seems to me that I found a faulty device / extension cord, it is the same. Oh, the whole thing is only in 3 sockets in the house, but beware - if in the one where I have everything connected, I remove the plug, the phenomenon does not occur in the other ones and it seems okay.

I tweaked the cables on the strip, they were not loose anyway.

The PE conductor from these 3 sockets is connected together but not connected anywhere - this is indicated by the symptoms.
Make a test with a light bulb!

tomoman wrote:

With these devices and extension cords I give up - there is no rule in it - when it seems to me that I found a faulty device / extension cord, it is the same. Oh, the whole thing is only in 3 sockets in the house, but beware - if in the one where I have everything connected, I remove the plug, the phenomenon does not occur in the other ones and it seems okay.

I tweaked the cables on the strip, they were not loose anyway.

In my opinion, only a good electrician saves you.
Regards.

lubamet wrote:

The PE conductor from these 3 sockets is connected together but not connected anywhere - this is indicated by the symptoms.
Make a test with a light bulb!

I'll do it tomorrow after work - I have to go for a light bulb and some wires :D

Exactly, and in cans, all cables should be (of course with colors) fastened together? Because I have in one box, for example, that the PE conductors are fastened together by 2 - 6 wires in total, or 3 pairs - maybe I can fasten them all together?

tomoman wrote:

lubamet wrote:

The PE conductor from these 3 sockets is connected together but not connected anywhere - this is indicated by the symptoms.
Make a test with a light bulb!

I'll do it tomorrow after work - I have to go for a light bulb and some wires :D

Exactly, and in cans, all cables should be (of course with colors) fastened together? Because I have in one box, for example, that the PE conductors are fastened together by 2 - 6 wires in total, or 3 pairs - maybe I can fasten them all together?

They should, but you can only wonder what if ...
Start with the bulb, if the differential doesn't work, connect them together.
I am also for an electrician because these are not balls.

tomoman wrote:

Exactly, and in cans, all cables should be (of course with colors) fastened together? Because I have in one box, for example, that the PE conductors are fastened together by 2 - 6 wires in total, or 3 pairs - maybe I can fasten them all together?

At the beginning you wrote that the cans have nothing to do with the sockets / separate circuit /. Leave those cans alone, it's probably the lighting. Unfortunately, in many installations this is the second phase to the chandelier with a switch. This is very confusing so don't interfere.

My friend, I urge you to invite an electrician to your home, it is about your and your family's safety and there is no joke with electricity

Call an electrician and let him check the continuity of the PE wire, if it is not connected, he can light the neon lamp and if the insulation between L and the housing is damaged, the differential may not work.

Theoretically, continuity can be checked with a light bulb, it is a not very professional test, but 100 times better than checking with a neon lamp or a multimeter because it misses the point at all - it will almost always show strange things.

lubamet wrote:

Theoretically, continuity can be checked with a light bulb, it is a not very professional test, but 100 times better than checking with a neon lamp or a multimeter because it misses the point at all - it will almost always show strange things.

Of course, you can check with a powerful light bulb, but it requires intervention in the dashboard because the differential will turn off the voltage within hundredths of a second. The author wrote that he knows little about electricity, so it's better to look for a professional.

From what you write, it appears that for your own health it would be better if you did not go into the installations yourself. You have received comprehensive answers from your colleagues, leave the rest to the electrician.