Overhaul of a residential building - repair of the power supply system

1. This project considers the overhaul of engineering networks of a residential building located

   At:....................................................

2. These drawings are made on the basis of:

   - Terms of reference for the design;

   - Architectural and construction drawings;

   - Technical passport.  

3. According to the degree of ensuring the reliability of power supply, consumers of a residential apartment building, according to SP 256.1325800.2016, belong to the III category.  

4. Mains voltage - 50Hz, 380/220 V, power factor 0.96, The design power of the designed electrical installation, according to SP 256.1325800.2016, is 33.7 kW.

5. The project provides for the replacement of distribution and group house-wide networks and equipment.

6. The project uses a grounding system of TN-C-S type.

7. Dismantle the old ones: ASU, floor boards, lighting fittings, distribution networks,

   systems of equalization of potentials with subsequent installation of new equipment according to the project.

8. Install ASU in compliance with the installation dimensions (ELECTRICAL installation 4.1.14):  

  -ASU should be installed in a place that does not interfere with evacuation routes, passage and opening of doors;  

   Tire N and PE tires should be made of copper, a jumper to bring the system to TN-C-S should be performed in the ASU.

9. Main lines of power supply of apartments and lighting lines of MOP from ASU to SCHE are laid in separate lines:

  - When installing electrical wiring, mark cable cores and wires for color identification according to GOST  R 50462-2009;

  -Laying of power supply lines in the attic to perform in metal pipe wiring;

  -Laying power supply lines in the technical room to perform in plastic  

   smooth-walled pipes;  

  -Laying of lighting  lines in the attic room to perform in metal pipe wiring;  

  -Risers of the main power lines of the SCHE and the lighting line in the MOSFET are made hidden in the strab: for  

   ensuring the changeability of wiring in the strab main power lines OF THE SCE and lighting    lines

   Make in plastic smooth-walled pipes.  

10. Place the SHE at a height of at least 2.2 m, perform the inputs in the SHE with subsequent sealing of the passage, provide plugs for closing free sockets after installing modular equipment, on the SHE perform marking with electrical safety signs and numbering of shields in accordance with the executive scheme. All connections and wiring of trunk lines must be carried out inside the SCE. All connections and wiring of lighting lines must be made in a separate junction box next to the SHE (ELECTRICAL installation 7.1.32.3).  

11. The wiring of lighting lines in the MOS is carried out hidden in the trab in plastic corrugated tubes.

12. Provide a separate line for powering the socket groups of the cold water metering unit.

13. The main grounding bus (HSS) is made inside the input-switchgear (ASU) as a HSS using the PE bus.

14. To protect the building from high potential drift through external metal communications and for  

   all metal structures at the entrance to the building must be connected to     each other and the main grounding bus RE VRU, as well as attached to the grounding circuit.

15. The location of the grounding circuit should be determined on the spot, after coordination of earthworks:  

   - use a round hot-dip galvanizing rod of 16 mm (at least 2.5 m for each electrode) as electrodes, the distance between the electrodes is not less than the length of the electrode (> 2.5 m);  

   -strapping of electrodes in the form of a triangle or rectangle (at least 3-4 electrodes)

    hot-dip galvanized steel strip with a cross-section of 40x4.  

16. Explanatory inscriptions on the schematic diagram of the supply network are adopted according to GOST21,608-84.

17. During the production of works, organizational and technical measures must be taken in

in accordance with the current safety regulations, ensuring the safe production of work.

Working drawings are developed in accordance with applicable norms, rules and standards.