code 71.11.
Works on the development and implementation projects of the electrical equipment only up to 35 kW.

code 42.22
Laying power transmission lines up to 0.4-35 kW over long distances through the transmission towers. Installing the laying city power transmission lines.
code 43.21
Installation work for electric power up to 0.4-35 kW.

from the symbol 33.14
Works only on maintenance, installation (tuning, programming and reprogramming), restoration of communication systems, communication lines, telephone facilities, data network systems, as well as branch telephone exchanges.
from the symbol 42.2
Works on the construction, restoration and installation of communication systems only, transmission lines, radio communications, telephone communications and data network systems.
from the symbol 42.22
Work on the construction, restoration and installation of communication systems only, communication lines, radio communications, telephone and data network systems, taking into account the construction of industrial engineering structures.
from the symbol 43.21
Works on installation, restoration, installation (tuning, programming and reprogramming) of the tele-communications system and tv-radio antennas, and other communications.

from the symbol (code) 33.14.90:
Repair/prevention works of an equipment determining the place of a fire only, an audible warning (signal) and an automatic system.
from the symbol (code) 43.21:
Installation works of an automatic fire protection system in buildings and constructions only.
from the symbol (code) 71.11:
Works on the projection of a system of equipment that determines the place of a fire, an audible warning (signal) and an automatic system.