Hello. I have the following problem. I submitted an application to the housing cooperative for permission to install an electric instantaneous water heater and an induction cooker. Of course, this requires a three-phase installation and an increase in power. They initially agree on 22 kW and 40 A protection. Apartment in a block of flats from the late 1970s, two-wire installation. The response I received from sp-ni amazed me and honestly I don't know what to think about it. I will quote some fragments. I faked the particularly controversial ones.
Submit to SP-ni diagrams of the premises' power supply and electrical installations in the apartment, including:
- internal power lines supplying the residential premises on the section from the bunk box to the switchboard in the apartment
- a floor board with an electricity measurement system and pre-meter protection
- residential switchboard, which should be equipped with appropriately selected: residual current circuit breaker with a switching current of 30.0 mA, overvoltage protection , automatic S-type circuit breakers protecting electrical circuits in the apartment that supply power to receiving devices
- electrical installations inside the apartment
The working arrangement of electrical installations in a residential premises: TN-S
What does all this mean? Do all these requirements apply to a new section of the installation, or do they expect me to tear out the entire installation in the apartment?
After all, things like differential will not work in a two-wire installation
And how can you write that the electrical installation system should be TN-S when the existing installation from the 1970s is two-wire. The third thing is, how can I present them with diagrams of all electrical installations in the apartment, since the installation was done by them 35 years ago and they should know what is in the walls, not me.
Please tell me who is abnormal here - me or them - because I am starting to feel dark despair.
Submit to SP-ni diagrams of the premises' power supply and electrical installations in the apartment, including:
- internal power lines supplying the residential premises on the section from the bunk box to the switchboard in the apartment
- a floor board with an electricity measurement system and pre-meter protection
- residential switchboard, which should be equipped with appropriately selected: residual current circuit breaker with a switching current of 30.0 mA, overvoltage protection , automatic S-type circuit breakers protecting electrical circuits in the apartment that supply power to receiving devices
- electrical installations inside the apartment
The working arrangement of electrical installations in a residential premises: TN-S
What does all this mean? Do all these requirements apply to a new section of the installation, or do they expect me to tear out the entire installation in the apartment?


Please tell me who is abnormal here - me or them - because I am starting to feel dark despair.
