A question with such a title came from a reader Xenia.
I remind you that this is already the 33rd publication in the series "question-answer on electrical work". You can familiarize yourself with some of the past parts by clicking on the links after this publication.
The text of the question itself sounded like this (literally):
Good day! Why can the machine knock out when the electric kettle or washing machine is turned on? At the same time, if the lights are on in the whole apartment and a vacuum cleaner, two computers and something else are working, then there is no such problem. Previously, this did not exist, appeared some time ago, what can be done? Could there be a problem with the vending machine?
I considered the issue and consulted Xenia within the framework of my knowledge and qualifications as follows:
Hello!
Alternatively, you can try changing the circuit breaker, but I'm afraid that the reason is in the wiring or the connection points of the electric kettle and washing machine. The circuit breaker reacts to short-circuit currents and overload currents. In the first case, the circuit breaker trips instantly in a fraction of a second, and in the second, it can work after a few minutes. Therefore, your situation is more like a short circuit.
To understand the reasons in more detail, I would like to see the power supply diagram of your apartment, indicating the connection points for the electrical equipment you described. I can assume that in the final electrical circuit of the sockets (which are intended for washing the machine and the electric kettle), the destruction of the insulation of the wires began, due to which, at the time of start-up, a short closure.
Perhaps the reason is in the junction box, where the insulation crumbles, and conductive channels appear between the phase and neutral conductors. Also, the reason may be in the outlet group or in a specific outlet, if a breakdown occurs at its terminals at the moment of switching on.
To find the cause, check the entire power circuit from the distribution board with the circuit breaker to the connection point.
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P.S. Link to some past parts - Part 32, Part 31, Part 30, Part 29, Part 28, Part 27.