Why are electrical appliances in the kitchen shocking?

Boris asks:
Hello, in the apartment there are automatic machines for each room. We bought a hood for manicure (an electric fan) and when turned on, the metal grill on the fan beats current and the refrigerator also beats a little. This situation is only in the kitchen. In the remaining rooms I connected a fan, it does not beat with electricity. He opened sockets in other rooms, there are only two wires, without grounding, although it only beats with current in the kitchen? Please help with information. Thanks in advance.

The answer to the question:
Hello! Grounding in the apartment is not at all, I understand correctly? Ungrounded refrigerators are often shocked, and often this indicates that the compressor has struck the casing. At the expense of the fan, the situation is more interesting.
Did you open the sockets in the kitchen? They are not accidentally connected by "earth" among themselves?

Let's consider two options.

The first is real, but slightly fantastic:

Perhaps you changed the wiring in the kitchen and laid a three-core cable, connected the sockets “as expected” with the connection of three wires (phase, zero and ground), but the third core is not connected to the ground bus.

As a result, the cases of all kitchen appliances connected to the sockets are connected through it, and if voltage appears on the case of one of the devices (for example, a leak to the case in the compressor of the refrigerator), all devices that are plugged into the sockets of this room will beat with current ...

Then you need to try to disconnect the protective conductor from the outlet where you turn on the hood, but only if this protective conductor is not connected to the ground bus and there is none at all.
And the second, more commonplace solution to the problem is to try turning the plug at the outlet in the refrigerator and at the hood.

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Posted: Updated: 14.02.2019 no comments yet
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