Electric Shock When Touching Dishwasher Door and Steel Sink - Grounding Issue?

Hello.
I have the following problem: when I touch the inner part of the dishwasher door and the steel sink, there is a puncture, i.e. I feel a big tingling sensation on my fingers. I tried to connect the dishwasher to other sockets, but the effect is the same. The socket is grounded. Please give me some suggestions and possibly information that I should include in order to diagnose the problem.

Dear Colleague, if the socket has an efficient and effective installation
protection, the cause may be a lack of connection between the socket and
the dishwasher casing. There may be a lack of contact in the plug
protective socket, broken protective wire, missing wire connection
protective device with the housing. All this should be checked and removed one by one
a break, because lack of protection may end tragically.

ajpier wrote:

Try zeroing.

Keep doing this and you`ll kill someone else.

I made several measurements and the voltage between:
phase and the dishwasher housing is 116 V
zero and the dishwasher housing 104 V
ground and the dishwasher housing 0 V
sink and the housing of the 70 V dishwasher
Please advise what to do to diagnose the cause of the puncture.

komarex1982 wrote:

I made several measurements and the voltage between:
phase and the dishwasher housing is 116 V
zero and the dishwasher housing 104 V
ground and the dishwasher housing 0 V

This means that the grounding (pin) in the socket is not connected to anything or there is a damaged PE cable somewhere further down (what you probably call grounding). The fault needs to be removed very urgently - it may cause electric shock.
PS.
Take the bulb holder and check if it lights up when you plug it between the phase and the pin in the socket. During this test, make sure the thread does not touch any electrical appliances in your home. If you have a residual current fuse, it will trip during this test. If you don`t have it, the bulb should glow normally and brightly. It may sound like a slogan, but it would be best if you called an electrician.

And don`t use the dishwasher until you fix the problem, because it can only get worse (hopefully not tragically!). THIS IS NOT A JOKE ANYMORE!!

Hello, Tomek and the term ux are absolutely right, and your colleagues who warn you are also right, it`s no joke that it`s just as bad in other places in your apartment. If I could suggest something, apart from the fact that an electrician`s visit is recommended, try this: unplug the dishwasher and use a piece of wire to connect the tap and the dishwasher housing very firmly, the wire should be at least 4 mm2, because it may turn out that it is stuck much deeper. (and I had a similar case in my career) and an electrician`s visit is absolutely necessary, don`t ignore it. Regards, MIREK.

Hello, my problem is similar - a puncture on a new, unused Electrolux dishwasher.
Breakdown occurs when connected to a two-wire installation.
Unfortunately, the installation in the entire apartment is 2-wire, without PE and without a differential switch.

I can connect the pin to N in the socket, then of course the voltage on the housing "disappears".
The dishwasher has one socket with the gas hob and connecting the gas hob to the gas riser also earths the entire system.
So I could say there is no problem,
but I don`t like the fact that I received a puncture in the standard version of the new dishwasher.

Should I do this "zeroing in the socket"?
Should I complain about the dishwasher, since the breakdown occurs only when connected to a 2-wire installation, and it is intended for a 3-wire installation?

You should:
1. Complain about a dishwasher
2. Urgently call an electrician and tidy up the installation.

Hello, hello...

After all, this "puncture" is a normal thing in practically all washing machines, dishwashers, refrigerators and computers...
Thanks to the anti-interference filter, 115V is maintained on the housing and this is not strange. The efficiency of such a "source" is very low and is unlikely to do any harm.

Complaining about a dishwasher will not help, because:
-this is most likely not a fault
-the dishwasher is not used in accordance with the requirements of the instructions, so the warranty is not valid

Why is it not being used as required?
Because it is not connected to a socket with a protective contact, and it is connected.
Well, the manual probably recommends connecting it to your own circuit, but let`s leave it alone for now...

Advice(s) for @albi_ :
1. Check the layout of the apartment`s power supply network (call the power supply company or check the contract with it)
2. If it is a TN-C system, there is a PEN cable in the socket, not an N cable. The PEN cable should be connected first to the protective contact and then to the socket contact by a bridge.

And then it will be absolutely OK. The same applies to a computer, washing machine or refrigerator (they all probably have voltage on their casing).

Thank you for your advice.
I don`t have a contract with ZE, but I will find out from the cooperative.
According to the description on the switchboard: there is an N and R line, N is connected to grounding. I presume that in the current nomenclature it is called PEN.

Taking care of the electrical system probably means replacing the board and all the wires in the apartment, thank you.
I connected the protective pin to the N line.

The voltage was about 100v - that`s what the "meter" in the test tube showed.
The efficiency is low, I experienced it when connecting a gas stove (dishwasher - stove hose - I - grounded gas pipe).

Thank you once again and I promise that the next renovation will include replacing the installation.

michcio wrote:

Hello, hello...

After all, this "puncture" is a normal thing in practically all washing machines, dishwashers, refrigerators and computers...
Thanks to the anti-interference filter, 115V is maintained on the housing and this is not strange. The efficiency of such a "source" is very low and is unlikely to do any harm.

The voltage from the anti-interference filter cannot be felt even if there is no connection to the "pin". Something`s not right here.

Hello. The voltage from the anti-interference filter will almost always be felt due to the capacitors located in the filter system. These devices are intended for use in installations with a protective conductor and then the problem will disappear. Therefore, they should be connected only to such (of course functional) installations. Regards.

Anti-interference filters include, among others: two capacitors connected in series, their connection point is led to the grounding pin (and the housing) and hence half of the supply voltage on the housing if the pin is not connected.

Some time ago, my mother-in-law had a similar problem at home. One day, standing barefoot on the floor, I started washing my hands. I was quite spoiled. I said loudly - Hey, the sink is kicking! and my grandmother confirmed my observation in a low voice... My hands fell. He has known about the case for a long time and says nothing. There was a gas-electric stove next to the sink. A few weeks earlier, a friend of the house, Mr. Rysiek, was repairing the rotary switch in the stove. There are a lot of wires connected to the switch, and due to time they have a similar brownish color to each other. After replacing the switch, Mr. Ryś was left with a yellow-green cable that had nowhere to connect. Fortunately, there was another connector in the switch... My hair would stand on end if I had one. This simply qualified as a crime story. The PE cable became detached during disassembly from the upper cooker plate. Without knowing what and how, the guy connected the phase to the kitchen casing and, by the way, to the adjacent sink... The installation was old, so it did not work properly. It`s a miracle that no one was hurt.