The indoor power supply project is an integral part of the project of any building and structure. The project is being carried out for both newly constructed facilities and facilities in which reconstruction is envisaged.


A professionally executed project is always carried out in accordance with applicable rules and regulations, based on the architectural features of a building or structure, related engineering requirements, while taking into account the wishes of the customer.

Since design is one of the main stages in the construction of an engineering structure, increased requirements are imposed on its implementation. In the future, it will determine not only the comfort of people, but also the safety, reliability and efficiency of the operation of electrical equipment at the facility, including the effectiveness of preventive and repair work.
We design indoor power supply for:
  • residential complexes,
  • shopping centers,
  • hospitals and clinics,
  • restaurants and cafes,
  • educational institutions,
  • office premises,
  • car dealerships and trade and exhibition centers,
  • hotels,
  • sports and recreation complexes
  • oil extraction plants,
  • food processing plants,
  • enterprises for storage and handling of grain,
  • enterprises of the paint and varnish industry, etc.

Residential complexes

Medical centers


A professionally executed internal power supply project is the key to the uninterrupted and safe distribution of electricity both in an industrial facility and in a residential building. On the basis of this project, the end consumers are provided with energy resources.
When carrying out projects of internal power supply, we rely on our experience in the production of switchboard equipment. As a result, we do not use standard, template solutions due, as a rule, to their redundant functionality. For each customer, together with the project, we develop individual power distribution boards, automatic transfer switches, reactive power compensation devices, etc.


At the first stage of design, a technical assignment is prepared jointly with the Customer. The next stage is the preparation of a working project, in accordance with which the necessary electrical work will be carried out. The project is divided into calculation and graphic parts. It is necessary to pay special attention to the accuracy of the calculations, since the internal power grid must withstand the planned load and have a safety margin.
Typically, a power supply project includes the following technical documentation:
  • Explanatory note;
  • Calculation of loads, short-circuit currents, voltage losses in lines, etc .;
  • Schematic diagrams of the power supply network;
  • Distribution network schematic diagrams;
  • Control schematic diagrams;
  • Electrical equipment layout plan;
  • Plans for lighting and distribution networks, grounding networks;
  • Cable list;
  • Biil of materials and equipment
  • Estimated documentation of the cost of electrical equipment and electrical installation work.

Technical specification (requirements)

The most important document in the design is the technical requirements. There is a document that provides comprehensive information on how exactly the project documentation should be executed. The Terms of Reference is drawn up in close cooperation between the Contractor and the Customer and must be performed in such a way that:

  • The customer received exactly the product he wanted to receive;
  • The customer spent a minimum and sufficient amount of financial resources on the construction;
  • The contractor completed the work for the minimum and sufficient time for this.
Explanatory note and calculation of electrical loads:
  • Electrical indicators of the design object;
  • Brief description of the design object;
  • Calculation of electrical loads;
  • Calculation of reactive power compensation devices;
  • Principles of reception and distribution of electricity applied in the project;
  • Electricity metering solutions;
  • Basic solutions for the laying of all electrical networks;
  • Protective measures;
  • Energy saving and environmental protection solutions.
Calculation of electrical loads is needed in order to obtain the initial data for the correct selection of the main elements of electrical networks and to ensure their safe operation. Based on the calculations of electrical loads, the selection of the elements of the electrical network is made. In particular, the rated power (rated current) serves as the basis for choosing the rated currents of protective switching devices and the cross-sections of conductive conductors of wires and cables in distribution and group networks.

Electrical diagrams

Single-line wiring diagrams provide the most disclosed idea of how the equipment used on the site works.

The schematic diagrams display all functional units of the electrical circuit, connections between them, data on the wiring used, etc. They serve as the basis for the development of other project documents: cable logs, electrical panels and consoles, external connection diagrams, etc.

Cable list
A cable list is a table in which all the necessary information about cables is indicated: brand, length, method of laying, from where and where the cable is laid. Such a table visually displays information on each cable route at the facility and makes it easier for electricians to lay them.
Plans for laying electrical networks and cable structures

On the plans for laying cable routes, the location of networks and electrical equipment, electrical panels, consoles, electrical appliances, etc. is displayed. The plans are drawings and sections of the premises with an indication of the ways of laying the methods to a specific electrical consumer at each specific site.


Cable routing is usually carried out in trays or in ducts laid on cable structures. A feature of laying on cable trays is protection against mechanical damage, good placement, ease of installation, accessibility for cable inspection, good appearance.


The use of cable structures, trays, boxes of appropriate designs allows them to be used in difficult operating conditions.


For each section in the drawing, a section is made with the arrangement of cables in trays in order to minimize the intersections of the wiring and for quick orientation along the laying of electrical networks.


Internal lighting.
Electric lighting is an important part of any task, because it determines the comfort and efficiency of working indoors as usual, and in an emergency it can help save lives.   When designing indoor electric lighting, the purpose of the room is taken into account. These can be office premises, residential buildings, shopping centers, shops, hospitals, industrial workshops of factories and enterprises, etc. In all cases, when developing lighting, the standardized illumination is taken into account in accordance with the current standards and the wishes of the customer, decoration of premises, the creation of shadows with columns, equipment or elements interior. All calculations are performed in the DiaLux program.   A well-thought-out lighting control system allows you to use lighting efficiently and comfortably. Lighting control can be performed locally with rocker switches or pushbutton switches using impulse relays. It is also possible to automatically control lighting from motion / presence sensors, illumination, scenarios or schedule from the smart home system or the dispatching post of the dispatching system (BMS).
Outdoor Lighting.
To ensure the safe movement of people and vehicles at night, outdoor lighting is being developed. It includes a set of lighting devices – lamps and projectors that create the necessary illumination on the surface, as well as controls for them. Outdoor lighting is usually controlled automatically from a twilight switch or manually from a control room. To save energy, it is possible to turn off some of the lamps at night. The choice of the type of fixtures and the methods of their installation, as well as their arrangement, are additionally agreed with the customer in order to create the necessary landscape design. All outdoor lighting calculations are carried out in the DiaLux program, and the final visualizations are attached to the project documentation.
Biil of materials and equipment.
The specification of equipment and materials is a very important section of the project documentation. The specification includes data on the complete set of all electrical equipment, all the necessary materials for the purchase and installation of the project. Also, based on the specification of equipment and materials, an estimate is made. To do this, the specification indicates the necessary data on equipment and materials: full name indicating technical characteristics, type (series), brand, article, GOST (TU), manufacturer, quantity.
Many years of experience in such a responsible area as the design of internal power supply allows us to make a reasonable and effective selection of equipment and materials. Preference is given to those units and materials that, at an adequate cost, show the highest reliability and efficiency. Devices for reducing energy losses, short circuits, network overloads, as well as elements of the grounding system, uninterrupted supply and safety of the equipment used are all components of the project.