In manuals, step-by-step diagrams and other manuals related to various electrical installation work, there are links to the PUE 7th edition 2016. This is the abbreviated name for a manual with detailed Rules for the construction of electrical installations. This manual is a reference book for everyone whose work is related to electricity in one way or another.
Current sections of the sixth and seventh editions with changes and additions
Main content
Rules for the construction of electrical installations can be characterized as a selection of normative legal acts, as well as an official document of the established form, adopted within the competence of the authorized government agency(Ministry of Energy).
These rules characterize devices, structural features, special claims in relation to separate systems and their components, components and communications of electrical installations.
The scope of distribution of PUE is a variety of installations used as lighting for buildings, places and structures external lighting in cities, towns and villages, in areas owned by organizations and institutions, as well as when installing ultraviolet irradiation distributed for health purposes.
The publication talks about the requirements for the electrical part of lighting, these include:
- lighting of structures, buildings and premises;
- electrical installations for lighting in open areas of streets;
- advertising lighting.
The 2015/2016 book also regulates and describes in detail the features of the use of electrical equipment located in residential premises and public buildings, entertaining and sports complexes. Using the available data in practice, you can be sure that safety precautions are observed and the current power is sufficient for all electrical appliances.
Important!
The provisions collected in the 2016 manual greatly simplify the design and installation of electrical wiring, and also describe the rules for operating various electrical installations. Therefore, anyone involved in electrical installation work should download the manual.
An electrician lays electrical wiring
Features of the latest 7th edition
This edition of the rules does not take into account recommendations for fire protection of electrical installations (according to GOST R 50571.17-2000), as well as protection from increased voltage caused by accidental electrical contact between live parts under voltage and the ground in electrical installations with a power of more than one kV, discharges thunderstorms and switching switches (according to GOST R 50571.18-2000, GOST R 50571.19-2000), and directed actions of electromagnetic forces (GOST R 50571.20-2000).
For more than half a century, PUEs have been subject to constant revision and addition. These actions were necessary, because both technology and technology are constantly developing, which makes it absolutely necessary to constantly strengthen the requirements for the safety and security of electrical installations. Variants of modifications of the PUE were noted in improved sequential editions.
The publication with serial number 1 was dated 1947-1949, the second issue - 1950-1956, they were issued gradually. Subsequently, the chapters of issue number three were combined into one book, and this was done for a whole year: from 1964 to 1965.
The fourth version was sent to print 6 years later, in 1971, after which another five years passed before the creation of the next, fifth edition, which was published as separate issues from 1976 to 1982.
The next version, used since June 1, 1985 in the USSR, was the sixth in a row, and was prepared with the help of the organization of the Ministry of Energy and Electrification.
The seventh issue was not published immediately: both single chapters and separate sections were released for review.
Sections and chapters of the 7th edition
The 2016 book is divided into 7 sections, each of which consists of several chapters. The first section provides general definitions and describes what an electrical installation is and what types of electrical networks there are. In addition, regulatory data is described, as well as protective measures for the operation of electrical systems and principles for the use of grounding are regulated.
The second section provides detailed information on how to choose the right electrical wiring, select the cable cross-section, the material of its manufacture, and the installation method. This part of the book describes all operations related to electrical sewerage. Here the word “sewage” is not used in the usual meaning for all of us as a drain dirty waters. Electrical energy channeling describes how current is transferred from a source to a consumer.
Transfer of electrical energy from source to consumer
When it comes to the operation of electrical networks, safety of use occupies a special place. Therefore, the entire third chapter is devoted to automatic devices that must shut off the current in the event of dangerous voltage. These measures help to avoid short circuits and overheating of wires during operation.
In any apartment, all electrical wires converge in one place - in the electrical panel. The electricity meter is usually located there as well. In order to always have light in the house, the current must pass through a complex distribution system consisting of many substations different levels. All regulatory data on distribution systems are contained in the fourth chapter of the PUE.
The fifth section talks about electrical power plants (generators, electric motors, electrical equipment for elevators and cranes).
The sixth section of 2015 gives detailed instructions for performing stages of lighting of all types:
- external;
- internal;
- advertising
The final seventh section describes the electrical equipment necessary for residential and public buildings, electricity metering systems, and voltage levels in networks. In addition, the section regulates the rules for the safe operation of electrical equipment in places of increased danger, for example, in fire or explosion hazardous areas.
How to use PUE?
Thanks to the systematization of all quantities, the use of PUE helps to avoid complex calculations; just download this manual. Let's look at one simple example in practice. So, in order to find out the required wire cross-section in the general case, you need to use the formula:
It is clear that it is difficult to understand how all these variables and constants are designated without deep knowledge in the field of electrodynamics and electrical engineering. Therefore, to calculate the required cross-section, they use a ready-made table from the rules, which can be viewed for free.
Permissible continuous current for wires and cords with rubber and polyvinyl chloride insulation with copper conductors
| Current cross-section provo- conductor, mm 2 | Current, A, for wires laid | |||||
|---|---|---|---|---|---|---|
| Open That | in one pipe | |||||
| two one- vein | three one- vein | four one- vein | one two- vein | one three- vein |
||
| 0,5 | 11 | - | - | - | - | - |
| 0,75 | 15 | - | - | - | - | - |
| 1 | 17 | 16 | 15 | 14 | 15 | 14 |
| 1,2 | 20 | 18 | 16 | 15 | 16 | 14,5 |
| 1,5 | 23 | 19 | 17 | 16 | 18 | 15 |
| 2 | 26 | 24 | 22 | 20 | 23 | 19 |
| 2,5 | 30 | 27 | 25 | 25 | 25 | 21 |
| 3 | 34 | 32 | 28 | 26 | 28 | 24 |
| 4 | 41 | 38 | 35 | 30 | 32 | 27 |
| 5 | 46 | 42 | 39 | 34 | 37 | 31 |
| 6 | 50 | 46 | 42 | 40 | 40 | 34 |
| 8 | 62 | 54 | 51 | 46 | 48 | 43 |
| 10 | 80 | 70 | 60 | 50 | 55 | 50 |
| 16 | 100 | 85 | 80 | 75 | 80 | 70 |
| 25 | 140 | 115 | 100 | 90 | 100 | 85 |
| 35 | 170 | 135 | 125 | 115 | 125 | 100 |
| 50 | 215 | 185 | 170 | 150 | 160 | 135 |
| 70 | 270 | 225 | 210 | 185 | 195 | 175 |
| 95 | 330 | 275 | 255 | 225 | 245 | 215 |
| 120 | 385 | 315 | 290 | 260 | 295 | 250 |
| 150 | 440 | 360 | 330 | - | - | - |
| 185 | 510 | - | - | - | - | - |
| 240 | 605 | - | - | - | - | - |
| 300 | 695 | - | - | - | - | - |
| 400 | 830 | - | - | - | - | - |
Where are the Rules used?
Today, the Electrical Installation Rules are considered the main and main document establishing requirements for standardization objects, mandatory for execution by design engineers.
When creating any version of new electrical installations, they are required to comply with the PUE, which describes electrical devices and the laws of their creation, affecting the important fundamental requirements of individual systems, parts and communications of the power system.
Power System Communications
7th edition on current moment used in Russia. The previous PUE, 6th edition, is still used in Armenia, Belarus, Kazakhstan, Kyrgyzstan, Moldova, Tajikistan and Uzbekistan. However, in Russia it is considered obsolete.
Video on the topic
Chapter 1.2. POWER SUPPLY AND ELECTRICAL NETWORKS
-Scope, definitions
-General requirements
-Categories of electrical receivers and ensuring reliability of power supply
-Voltage levels and regulation, reactive power compensation
Chapter 1.7. GROUNDING AND ELECTRICAL SAFETY MEASURES
-Scope of application.
-Terms and definitions.
-General requirements
-Measures for protection against direct contact
-Measures to protect against direct and indirect contact
-Protection measures for indirect contact
-Grounding devices for electrical installations with voltages above 1 kV in networks with an effectively grounded neutral
-Grounding devices for electrical installations with voltages above 1 kV in networks with an isolated neutral
-Grounding devices for electrical installations with voltages up to 1 kV in networks with a solidly grounded neutral
-Grounding devices for electrical installations with voltages up to 1 kV in networks with an isolated neutral
-Grounding devices in areas with high earth resistivity
-Grounding conductors. Grounding conductors Main grounding bus
-Protective conductors (P-conductors)
-Combined neutral protective and neutral working conductors (RELT conductors)
-Conductors of the potential equalization system
-Connections and connections of grounding, protective conductors and conductors of the equalization and potential equalization system
-Portable electrical receivers
-Mobile electrical installations.
-Electrical installations of premises for keeping animals
Chapter 1.8. ACCEPTANCE TEST STANDARDS
1.8.13. General provisions Synchronous generators and compensators DC machines
1.8.14. Electric motors AC
1.8.15. Power transformers, autotransformers, oil reactors and grounding arc suppression reactors (arc suppression coils)
1.8.16. Instrument current transformers
1.8.17. Voltage transformers Oil switches
1.8.18. Air circuit breakers
1.8.19. SF6 circuit breakers, Vacuum circuit breakers
1.8.20. Load switches
1.8.21. Disconnectors, separators and short circuiters
Complete switchgears for indoor and outdoor installation (KRU i-KRUN)"
1.8.26. Complete busbars (busbars)
1.8.27. Busbars and connecting busbars
1.8.28. Dry current-limiting reactors
1.8.29. Electrostatic precipitators
1.8.30. Capacitors
1.8.31. Valve arresters and surge suppressors
1.8.32. Tubular arresters
1.8.33. Fuses, fuse-disconnectors with voltages above 1 kV
1.8.34. Bushings and bushings
1.8.35. Suspension and support insulators
1.8.36. Transformer oil
1.8.37. Electrical apparatus, secondary circuits and electrical wiring with voltage up to 1 kV
1.8.38. Batteries
1.8.39. Grounding devices
1.8.40. Power cable lines
Overhead power lines with voltage above 1 kV
Chapter 1.9. INSULATION OF ELECTRICAL INSTALLATIONS
-General requirements
-Insulation
External glass and porcelain insulation of electrical equipment and Qpy
Selecting insulation based on discharge characteristics
Determination of the degree of pollution
Usage rates of the main types of insulators and insulating structures (glass and porcelain)
Section 2. TRANSMISSION OF ELECTRICITY
Chapter 2.4. OVERHEAD POWER LINES WITH VOLTAGE UP TO 1 KB.
-Scope of application. Definitions
-General requirements
-Climatic conditions
-Wires. Linear fittings
-Location of wires on supports
-Insulation
-Grounding. Surge protection
-Supports
-Dimensions, intersections and approaches.
-Intersections, approaches, joint suspension of overhead lines with communication lines of wired broadcasting and radio communications
-Intersections and approaches of overhead lines with engineering structures
Chapter 2.5. OVERHEAD POWER LINES
VOLTAGE ABOVE 1 KB
-Scope of application. Definitions
-General requirements.
- Requirements for the design of overhead lines, taking into account the features of their repair and maintenance.
-Protection of overhead lines from exposure environment
-Climatic conditions and loads
-Wires and lightning protection cables.
-Location of wires and cables and distances between them
-Insulators and fittings
-Surge protection, grounding
-Supports and foundations
-Large transitions
-Suspension of fiber-optic communication lines on overhead lines.
-Passing overhead lines through uninhabited and difficult to reach terrain.
-Passage of overhead lines through plantings
-Passage of overhead lines through populated areas
-Intersection and bringing together overhead lines
-Intersection and approach of overhead lines with communication, signaling and wire broadcasting structures
-Intersection and approach of overhead lines with railways
-Intersection and convergence of overhead lines with highways.
-Intersection, convergence or parallel movement of overhead lines with trolleybus and tram lines
-Intersection of overhead lines with water spaces
-Passing overhead lines across bridges
-Passage of overhead lines across dams and dikes
-Approximation of overhead lines with explosion and fire hazardous installations
-Intersection and convergence of overhead lines with above-ground and above-ground pipelines, oil and gas transport structures and cable cars
-Intersection and convergence of overhead lines with underground pipelines
-Convergence of overhead lines with airfields and heliports
-Appendix 1. Distances between wires and between wires and cables according to dancing conditions
Appendix 2. Reference material to Chapter 2.5 PU9.
List of reference normative documents
Section 4. SWITCH DEVICES AND SUBSTATIONS
Chapter 4.1. SWITCH DEVICES WITH VOLTAGE UP TO 1 KB AC AND UP TO 1.5 KB DC
-Scope of application
-General requirements
-Installation of instruments and apparatus
-Tires, wires, cables
-Distribution device designs
-Installation of switchgear in electrical rooms
-Installation of distribution devices production premises-Installation of distribution devices outdoors.
Chapter 4.2. SWITCHGEARS AND SUBSTATIONS WITH VOLTAGES ABOVE 1KB
-Scope, definitions.
-General requirements. Open distribution devices
-Biological protection from exposure to electric and magnetic fields
-Enclosed switchgears and substations
-Intrashop switchgears and transformer substations
-Complete, pole, mast transformer substations and network sectioning points
-Lightning surge protection
-Protection of rotating electrical machines from lightning surges
-Protection against internal overvoltage
-Pneumatic farming
-Oil farming
-Installation of power transformers and reactors
-Application. Reference material for Chapter 4.2 of the PUE.
-List of reference normative documents
Section 6. ELECTRIC LIGHTING
Chapter 6.1. GENERAL PART
-Scope of application. Definitions
-General requirements
-Emergency lighting
-Implementation and protection of lighting networks
-Safety protection measures
Chapter 6.2. INTERIOR LIGHTING.
-General requirements
-Power supply lighting network
-Group network
Chapter 6.3. OUTDOOR LIGHTING
-Light sources, installation of lighting fixtures and supports
-Power supply for outdoor lighting installations
-Implementation and protection of outdoor lighting networks
Chapter 6.6. LIGHTING AND ELECTRICAL INSTALLATION DEVICES
-Lighting fixtures
-Electrical installation devices
Section 7. ELECTRICAL EQUIPMENT OF SPECIAL INSTALLATIONS
Chapter 7.1. ELECTRICAL INSTALLATIONS OF RESIDENTIAL, PUBLIC, ADMINISTRATIVE AND DOMESTIC BUILDINGS.
-Scope of application. Definitions. General requirements. Electricity supply.
-Input devices, distribution boards, distribution points, group boards
-Electrical wiring and cable lines
-Internal electrical equipment
-Electricity metering
-Safety protection measures
Chapter 7.2. ELECTRICAL INSTALLATIONS FOR ENTERTAINMENT ENTERPRISES, CLUB INSTITUTIONS AND SPORTS FACILITIES
-Scope of application. Definitions
-General requirements. Electricity supply
-Electric lighting
-Power electrical equipment,
-Laying of cables and wires
-Safety protection measures
Chapter 7.5. ELECTROTHERMAL INSTALLATIONS
-Scope of application.
-Definitions.
-General requirements
-Installation of direct, indirect and resistance arc furnaces Induction and dielectric heating installations
-Installation of resistance furnaces of direct and indirect action
-Electron beam installations
-Ion and laser installations.
Chapter 7.6. ELECTRIC WELDING INSTALLATIONS
-Scope of application
-Definitions
-General requirements
-Requirements for premises for electric welding installations and welding stations
- Installations for electric welding (cutting, surfacing) by fusion
-Electric welding installations using pressure
Chapter 7.10. ELECTROLYSIS AND ELECTROLYSIS INSTALLATIONS
-Scope of application
-Definitions. Composition of installations
-General requirements.
- Installations for electrolysis of water and aqueous solutions
-Electrolysis plants for hydrogen production (hydrogen stations)
-Electrolysis plants for chlorine production
-Magnesium electrolysis installations
-Aluminum electrolysis plants
-Aluminum electrolytic refining plants
-Electrolysis plants for ferroalloy production
-Electrolysis plants for nickel-cobalt production
-Copper electrolysis installations
-Galvanic coating installations
Chapter 1.1 General part
General instructions for electrical installations
Chapter 1.2 Power supply and electrical networks
Scope of application. Definitions
General requirements
Categories of electrical receivers and ensuring reliability of power supply
Voltage levels and regulation, reactive power compensation
Chapter 1.7 Grounding and electrical safety precautions
Scope of application. Terms and definitions
General requirements
Precautions against direct contact
Measures to protect against direct and indirect contact
Protective measures for indirect contact
Grounding devices for electrical installations with voltages above 1 kV in networks with an effectively grounded neutral
Grounding devices for electrical installations with voltages above 1 kV in networks with an isolated neutral
Grounding devices for electrical installations with voltages up to 1 kV in networks with a solidly grounded neutral
Grounding devices for electrical installations with voltages up to 1 kV in networks with an insulated neutral
Grounding devices in areas with high earth resistivity
Grounding switches
Grounding conductors
Main ground bus
Protective conductors (PE conductors)
Combined neutral protective and neutral working conductors (PEN conductors)
Potential equalization system conductors
Connections and connections of grounding, protective conductors and conductors of the equalization and potential equalization system
Portable electrical receivers
Mobile electrical installations
Electrical installations of animal premises
Chapter 1.8. Acceptance testing standards
1.8.1 – 1.8.12. General provisions
1.8.13. Synchronous generators and compensators
1.8.14. DC machines
1.8.15. AC motors
1.8.16. Power transformers, autotransformers, oil reactors and grounding arc suppression reactors (arc suppression coils)
1.8.17. Instrument current transformers
1.8.18. Voltage transformers
1.8.19. Oil switches
1.8.20. Air circuit breakers
1.8.21. SF6 circuit breakers
1.8.22. Vacuum circuit breakers
1.8.23. Load switches
1.8.24. Disconnectors, separators and short circuiters
1.8.25. Complete switchgear for indoor and outdoor installation (KRU and KRUN)
1.8.26. Complete busbars (busbars)
1.8.27. Busbars and connecting busbars
1.8.28. Dry current-limiting reactors
1.8.29. Electrostatic precipitators
1.8.30. Capacitors
1.8.31. Valve arresters and surge suppressors
1.8.32. Tubular arresters
1.8.33. Fuses, fuse-disconnectors with voltages above 1 kV
1.8.34. Bushings and bushings
1.8.35. Suspension and support insulators
1.8.36. Transformer oil
1.8.37. Electrical devices, secondary circuits and electrical wiring with voltage up to 1 kV
1.8.38. Batteries
1.8.39. Grounding devices
1.8.40. Power cable lines
1.8.41. Overhead power lines with voltage above 1 kV
Chapter 1.9 Insulation of electrical installations
Scope of application. Definitions
General requirements
Overhead line insulation
External glass and porcelain insulation of electrical equipment and switchgear
Selecting insulation based on discharge characteristics
Determining the degree of contamination
Usage rates of the main types of insulators and insulating structures (glass and porcelain)
Section 2. Electricity sewerage
Chapter 2.4 Overhead power lines with voltage up to 1 kV
Scope of application. Definitions
General requirements
Climatic conditions
Wires. Linear fittings
Location of wires on supports
Insulation
Grounding. Surge protection
Supports
Dimensions, intersections and approaches
Intersections, approaches, joint suspension of overhead lines with communication lines, wire broadcasting and rk
Intersections and approaches of overhead lines with engineering structures
Chapter 2.5 Overhead power lines with voltage above 1 kV
Scope of application. Definitions
General requirements
Requirements for the design of overhead lines, taking into account the features of their repair and maintenance
Protection of overhead lines from environmental influences
Climatic conditions and loads
Wires and lightning protection cables
Location of wires and cables and distances between them
Insulators and fittings
Surge protection, grounding
Supports and foundations
Big transitions
Suspension of fiber-optic communication lines on overhead lines
Passage of overhead lines through unpopulated and inaccessible areas
Passage of overhead lines through plantings
Passage of overhead lines through populated areas
Intersection and convergence of overhead lines with each other
Intersection and proximity of overhead lines with communication, signaling and wire broadcasting structures
Intersection and convergence of overhead lines with railways
Intersection and convergence of overhead lines with highways
Crossing, approaching or paralleling overhead lines with trolleybus and tram lines
Intersection of overhead lines with water spaces
Passage of overhead lines across bridges
Passage of overhead lines across dams and dikes
Proximity of overhead lines with explosion- and fire-hazardous installations
Intersection and convergence of overhead lines with above-ground and above-ground pipelines, oil and gas transport structures and cable cars
Intersection and approach of overhead lines with underground pipelines
Approximation of overhead lines with airfields and heliports
Application. Distances between wires and between wires and cables according to dancing conditions
Section 4. Switchgears and substations
Chapter 4.1 Switchgear voltages up to 1 kV AC and up to 1.5 kV DC
Scope of application
General requirements
Installation of instruments and apparatus
Tires, wires, cables
Switchgear designs
Installation of distribution devices in electrical rooms
Installation of distribution devices in production premises
Installation of switchgear outdoors
Chapter 4.2 Switchgears and substations with voltages above 1 kV
Scope, definitions
General requirements
Open distribution devices
Biological protection from exposure to electric and magnetic fields
Enclosed switchgears and substations
In-shop switchgears and transformer substations
Complete, pole, mast transformer substations and network sectioning points
Lightning surge protection
Pneumatic farming
Oil farming
Installation of power transformers and reactors
Application. Reference material for Chapter 4.2 of the PUE. List of reference normative documents
Section 6. Electric lighting
Chapter 6.1 General part
Scope of application. Definitions
General requirements
Emergency lighting
Implementation and protection of lighting networks
Protective Security Measures
Chapter 6.2 Interior lighting
General requirements
Supply lighting network
Group network
Chapter 6.3 Outdoor lighting
Light sources, installation of lighting fixtures and supports
Power supply for outdoor lighting installations
Implementation and protection of outdoor lighting networks
Chapter 6.4 Illuminated advertising, signs and illumination
Chapter 6.5 Lighting Control
General requirements
Interior lighting control
Outdoor lighting control
Chapter 6.6 Lighting devices and electrical installation devices
Lighting devices
Electrical installation devices
Section 7 Electrical equipment of special installations
Chapter 7.1 Electrical installations of residential, public, administrative and domestic buildings
Scope of application. Definitions
Input devices, distribution boards, distribution points, group boards
Electrical wiring and cable lines
Internal electrical equipment
Electricity metering
Protective Security Measures
Chapter 7.2 Electrical installations of entertainment enterprises, clubs and sports facilities
Scope of application. Definitions
General requirements. Electricity supply
Electric lighting
Power electrical equipment
Laying cables and wires
Protective Security Measures
Chapter 7.5 Electrothermal installations
Scope of application
Definitions
General requirements
Installations of direct, indirect and resistance arc furnaces
Induction and dielectric heating installations
Installations of direct and indirect resistance furnaces
Electron beam installations
Ion and laser installations
Chapter 7.6 Electric welding installations
Scope of application
Definitions
General requirements
Requirements for premises for welding installations and welding stations
Installations for electric welding (cutting, surfacing) by fusion
Electric pressure welding plants
Chapter 7.10 Electrolysis and electroplating plants
Scope of application
Definitions. Composition of installations
General requirements
Installations for electrolysis of water and aqueous solutions
Electrolysis plants for hydrogen production (hydrogen stations)
Electrolysis plants for chlorine production
Magnesium electrolysis plants
Aluminum electrolysis plants
Aluminum electrolytic refining plants
Electrolysis plants for ferroalloy production
Nickel-cobalt electrolysis plants
Copper electrolysis plants
Electroplating plants
7.1.1. This chapter of the Rules applies to electrical installations of: residential buildings listed in SNiP 2.08.01-89 “Residential Buildings”; public buildings listed in SNiP 2.08.02-89 "Public buildings and structures" (except for buildings and premises listed in Chapter 7.2): administrative and domestic buildings listed in SNiP 2.09.04-87 "Administrative and domestic buildings" ; Additional requirements may apply to electrical installations of unique and other special buildings not included in the above list.
The requirements of this chapter do not apply to special electrical installations in medical institutions, organizations and institutions of science and scientific services, to dispatch and communication systems, as well as to electrical installations, which by their nature should be classified as electrical installations industrial enterprises(workshops, boiler rooms, heating points, pumping stations, laundry factories, dry cleaning factories, etc.).
7.1.2. Electrical installations of buildings, in addition to the requirements of this chapter, must meet the requirements of the chapters of Section. 1-6 PUE to the extent that they are not changed by this chapter.
7.1.3. Input device (ID) is a set of structures, devices and devices installed at the input of the supply line into the building or its separate part.
The input device, which also includes devices and devices of outgoing lines, is called an input distribution device (IDU).
7.1.4. Main distribution board (MSB) is a distribution board through which the entire building or its separate part is supplied with electricity. The role of the main switchboard can be performed by an ASU or a low voltage switchboard of a substation.
7.1.5. Distribution point (DP) is a device in which protection devices and switching devices (or only protection devices) are installed for individual electrical receivers or their groups (electric motors, group panels).
7.1.6. Group panel - a device in which protection devices and switching devices (or only protection devices) are installed for separate groups lamps, plug sockets and stationary electrical receivers.
7.1.7. Apartment panel - a group panel installed in an apartment and designed to connect the network that supplies lamps, plug sockets and stationary electrical receivers of the apartment.
7.1.8. Floor distribution panel - a panel installed on the floors of residential buildings and intended to supply power to apartments or apartment panels.
7.1.9. Electrical room - room. accessible only to qualified service personnel, in which VU, ASU, main switchboard and other distribution devices are installed.
7.1.10. Supply network - a network from a substation switchgear or a branch from overhead power lines to the VU, ASU, main switchboard.
7.1.11. Distribution network - network from VU, ASU, main switchboard to distribution points and switchboards.
7.1.12. Group network - a network from panels and distribution points to lamps, plug sockets and other electrical receivers.
General requirements. Electricity supply
7.1.13. Electrical receivers must be powered from a 380/220 V network with a TN-S or TN-C-S grounding system.
When reconstructing residential and public buildings with a network voltage of 220/127 V or 3 x 220 V, the network should be switched to a voltage of 380/220 V with a TN-S or TN-C-S grounding system.
7.1.14. External power supply to buildings must meet the requirements of Chapter 1.2.
7.1.15. In the dormitories of various institutions, in schools and others educational institutions etc. the construction of built-in and attached substations is not allowed.
In residential buildings, in exceptional cases, it is allowed to place built-in and attached substations using dry transformers in agreement with state supervisory authorities, and must be fully implemented sanitary requirements to limit noise and vibration levels in accordance with current standards.
The construction and placement of built-in, attached and free-standing substations must be carried out in accordance with the requirements of the chapters of Section. 4.
7.1.16. It is recommended that power and lighting electrical receivers be powered from the same transformers.
7.1.17. The location and layout of transformer substations must provide for the possibility of round-the-clock unhindered access to them for personnel of the energy supply organization.
7.1.18. Power supply for safety lighting and evacuation lighting must be carried out in accordance with the requirements of Chapter. 6.1 and 6.2, as well as SNiP 23-05-95 “Natural and artificial lighting”.
7.1.19. If there are elevators in the building, which are also intended for transporting fire departments, their power supply must be provided in accordance with the requirements of Chapter. 7.4.
7.1.20. Electrical networks of buildings must be designed to power advertising lighting, shop windows, facades, illumination, outdoor, fire-fighting devices, dispatch systems, local television networks, light indicators of fire hydrants, safety signs, bell and other alarms, light fencing lights, etc., in in accordance with the design specifications.
7.1.21. When supplying single-phase consumers of buildings from multiphase distribution network It is allowed for different groups of single-phase consumers to have common N and PE conductors (five-wire network) laid directly from the ASU; combining N and PE conductors (four-wire network with PEN conductor) is not allowed.
When supplying single-phase consumers from a multiphase supply network with branches from overhead lines, when the PEN conductor of the overhead line is common to groups of single-phase consumers powered from different phases, it is recommended to provide protective shutdown of consumers when the voltage exceeds the permissible limit, arising due to load asymmetry when the PEN breaks conductor. The disconnection must be carried out at the entrance to the building, for example, by influencing the independent release of the input circuit breaker using a maximum voltage relay, and both the phase (L) and neutral working (N) conductors must be disconnected.
When choosing devices and devices installed at the input, preference, other things being equal, should be given to devices and devices that remain operational when the voltage exceeds the permissible voltage, arising due to load asymmetry when the PEN or N conductor breaks, while their switching and other performance specifications may not be met.
In all cases, it is prohibited to have switching contact and non-contact elements in PE and PEN conductor circuits.
Connections that can be disassembled with a tool are allowed, as well as connectors specially designed for this purpose.
Input devices, distribution boards, distribution points, group boards
7.1.22. A VU or ASU must be installed at the entrance to the building. One or more VU or ASU may be installed in a building.
If there are several economically separate consumers in a building, it is recommended that each of them install an independent VU or ASU.
The ASU is also allowed to supply power to consumers located in other buildings, provided that these consumers are functionally connected.
For branches from overhead lines with a rated current of up to 25 A, the VU or ASU may not be installed at the inputs to the building if the distance from the branch to the group panel, which in this case performs the functions of the VU, is no more than 3 m. This section of the network must be carried out with a flexible copper cable with with a conductor cross section of at least 4 mm 2, flame retardant, laid in a steel pipe, and the requirements for ensuring a reliable contact connection with the branch wires must be met.
For air input, surge suppressors must be installed.
7.1.23. Before entering buildings, it is not allowed to install additional cable boxes to separate the service scope of external supply networks and networks inside the building. Such separation must be carried out in the ASU or main switchboard.
7.1.24. VU, ASU, main switchboard must have protection devices on all inputs of supply lines and on all outgoing lines.
7.1.25. Control devices must be installed at the input of supply lines to the VU, ASU, and main switchboards. On outgoing lines, control devices can be installed either on each line, or be common to several lines.
A circuit breaker should be considered as a protection and control device.
7.1.26. Control devices, regardless of their presence at the beginning of the supply line, must be installed at the inputs of the supply lines in retail premises, utilities, administrative premises, etc., as well as in consumer premises that are administratively and economically isolated.
7.1.27. The floor panel must be installed at a distance of no more than 3 m along the length of the electrical wiring from the supply riser, taking into account the requirements of Chapter. 3.1.
7.1.28. VU, ASU, main switchboard, as a rule, should be installed in electrical switchboard rooms accessible only to maintenance personnel. In areas prone to flooding, they should be installed above the flood level.
VU, ASU, main switchboard can be located in rooms allocated in operational dry basements, provided that these rooms are accessible to maintenance personnel and are separated from other rooms by partitions with a fire resistance limit of at least 0.75 hours.
When placing VU, ASU, main switchboards, distribution points and group panels outside electrical switchboard rooms, they must be installed in convenient and accessible places for maintenance, in cabinets with an enclosure protection degree of at least IP31.
The distance from pipelines (water supply, heating, sewerage, internal drains), gas pipelines and gas meters to the installation site must be at least 1 m.
7.1.29. Electrical switchboard rooms, as well as VU, ASU, main switchboard are not allowed to be located under toilets, bathrooms, showers, kitchens (except for apartment kitchens), sinks, washing and steam rooms of baths and other rooms associated with wet technological processes, except in cases where special measures have been taken for reliable waterproofing to prevent moisture from entering the premises where the distribution devices are installed.
It is not recommended to lay pipelines (plumbing, heating) through electrical rooms.
Pipelines (plumbing, heating), ventilation and other ducts laid through electrical switchboard rooms should not have branches within the room (with the exception of a branch to the heating device of the switchboard room itself), as well as hatches, valves, flanges, valves, etc.
Laying gas and pipelines with flammable liquids, sewerage and internal drains through these premises is not permitted.
Doors to electrical rooms must open outward.
7.1.30. The premises in which ASUs and main switchboards are installed must have natural ventilation and electric lighting. The room temperature should not be lower than +5 o C.
7.1.31. Electrical circuits within the VU, ASU, main switchboard, distribution points, group panels should be carried out with wires with copper conductors.
Electrical wiring and cable lines
7.1.32. Internal wiring must be carried out taking into account the following:
1. Electrical installations of different organizations, separate administratively and economically, located in the same building, can be connected by branches to a common supply line or fed by separate lines from the ASU or main switchboard.
2. It is allowed to connect several risers to one line. On branches to each riser supplying apartments in residential buildings with more than 5 floors, a control device combined with a protection device should be installed.
3. In residential buildings, lamps in staircases, lobbies, halls, floor corridors and other indoor premises outside apartments must be powered via independent lines from the ASU or separate group panels powered from the ASU. Connecting these lamps to floor and apartment panels is not allowed.
4. For staircases and corridors with natural light, it is recommended to provide automatic control of electric lighting depending on the illumination created by natural light.
5. It is recommended to supply power to electrical installations of non-residential buildings using separate lines.
7.1.33. Supply networks from substations to VU, ASU, main switchboard must be protected from short-circuit currents.
7.1.34. Cables and wires with copper conductors should be used in buildings
Supply and distribution networks, as a rule, must be made of cables and wires with aluminum conductors if their design cross-section is 16 mm 2 or more.
The power supply to individual electrical receivers related to the engineering equipment of buildings (pumps, fans, heaters, air conditioning units, etc.) can be provided by wires or cables with aluminum conductors with a cross-section of at least 2.5 mm 2.
In museums, art galleries, and exhibition spaces, it is permitted to use lighting busbar trunking systems with a degree of protection IP20, in which the branch devices to the lamps have detachable contact connections located inside the busbar trunking box at the time of switching, and busbar trunking systems with a degree of protection IP44, in which the branching devices to the lamps are made with using plug connectors that ensure the branch circuit is broken until the plug is removed from the socket.
In these premises, lighting busbar trunking systems must be powered from distribution points by independent lines.
In residential buildings, the cross-sections of copper conductors must correspond to the calculated values, but not be less than those indicated in Table 7.1.1.
1 Until 2001, according to the existing construction backlog, the use of wires and cables with aluminum conductors was allowed.
Table 7.1.1. The smallest permissible cross-sections of cables and wires of electrical networks in residential buildings.
7.1.35. In residential buildings, laying vertical sections of the distribution network inside apartments is not allowed.
It is prohibited to lay wires and cables from the floor panel in a common pipe, common box or channel that supply lines to different apartments.
Fire-retardant installation in a common pipe, common box or channel of building structures made of non-combustible materials, wires and cables of supply lines of apartments together with wires and cables of group lines of working lighting of staircases, floor-by-floor corridors and other indoor premises is allowed.
7.1.36. In all buildings, group network lines laid from group, floor and apartment panels to general lighting fixtures, plug sockets and stationary electrical receivers must be three-wire (phase - L, neutral working - N and neutral protective - PE conductors).
Combining zero working and zero protective conductors of different group lines is not allowed.
The neutral working and neutral protective conductors are not allowed to be connected on panels under a common contact terminal.
Conductor cross-sections must meet the requirements of clause 7.1.45.
7.1.37. Electrical wiring in the premises should be replaced: hidden - in the channels of building structures, embedded pipes; open - in electrical skirting boards, boxes, etc.
In technical floors, undergrounds, unheated basements, attics, ventilation chambers, damp and especially damp rooms, it is recommended that electrical wiring be carried out openly.
In buildings with building structures made of non-combustible materials, permanent, monolithic installation of group networks is allowed in the grooves of walls, partitions, ceilings, under plaster, in the floor preparation layer or in the voids of building structures, carried out with cable or insulated wires in a protective sheath. The use of permanently embedded laying of wires in panels of walls, partitions and ceilings, made during their manufacture at construction industry factories or carried out in the installation joints of panels during the installation of buildings, is not allowed.
7.1.38. Electrical networks laid behind impenetrable suspended ceilings and in partitions are considered as hidden electrical wiring and should be carried out: behind ceilings and in the voids of partitions made of flammable materials in metal pipes with localization capabilities and in closed boxes; behind ceilings and in partitions made of non-combustible materials 2 - in pipes and ducts made of non-flammable materials, as well as flame retardant cables. In this case, it must be possible to replace wires and cables.
2 Suspended ceilings made of non-combustible materials mean those ceilings that are made of non-combustible materials, while other building structures located above suspended ceilings, including interfloor ceilings, are also made of non-combustible materials.
7.1.39. In rooms for cooking and eating, with the exception of apartment kitchens, open laying of cables is allowed. Open wiring of wires in these rooms is not allowed.
In apartment kitchens, the same types of electrical wiring can be used as in living rooms and corridors.
7.1.40. In saunas, bathrooms, toilets, showers, as a rule, hidden electrical wiring should be used. Open cable routing is allowed.
In saunas, bathrooms, toilets, showers, laying wires with metal sheaths, in metal pipes and metal sleeves is not allowed.
In saunas for zones 3 and 4 according to GOST R 50571.12-96 "Electrical installations of buildings. Part 7. Requirements for special electrical installations. Section 703. Premises containing sauna heaters" electrical wiring with a permissible insulation temperature of 170 o C must be used.
7.1.41. Electrical wiring in attics must be carried out in accordance with the requirements of Section. 2.
7.1.42. Through the basements and technical undergrounds of sections of the building, it is allowed to lay power cables with a voltage of up to 1 kV, supplying electrical receivers of other sections of the building. The specified cables are not considered as transit; laying transit cables through basements and technical undergrounds of buildings is prohibited.
7.1.43. Open laying of transit cables and wires through storerooms and warehouses is not permitted.
7.1.44. Lines supplying refrigeration units of trade and catering, must be laid from the ASU or main switchboard of these enterprises.
7.1.45. The selection of conductor cross-sections should be carried out in accordance with the requirements of the relevant chapters of the PUE.
Single-phase two- and three-wire lines, as well as three-phase four- and five-wire lines when supplying single-phase loads, must have a cross-section of zero working (N) conductors equal to the cross-section of phase conductors.
Three-phase four- and five-wire lines when feeding three-phase symmetrical loads must have a cross-section of zero working (N) conductors equal to the cross-section of phase conductors, if the phase conductors have a cross-section of up to 16 mm 2 for copper and 25 mm 2 for aluminum, and for large cross-sections - not less than 50% of the cross-section of phase conductors.
The cross-section of PEN conductors must be at least the cross-section of N conductors and at least 10 mm 2 for copper and 16 mm 2 for aluminum, regardless of the cross-section of the phase conductors.
The cross-section of PE conductors must be equal to the cross-section of phase conductors when the latter cross-section is up to 16 mm 2, 16 mm 2 when the cross-section of phase conductors is from 16 to 35 mm 2 and 50% of the cross-section of phase conductors for larger cross-sections.
The cross-section of PE conductors not included in the cable must be at least 2.5 mm 2 - if there is mechanical protection and 4 mm 2 - if there is none.
Internal electrical equipment
7.1.46. In food preparation rooms, except for apartment kitchens, lamps with incandescent lamps installed above workplaces (stoves, tables, etc.) must have a bottom safety glass. Lamps with fluorescent lamps must have grilles or grids or lamp holders that prevent the lamps from falling out.
7.1.47. In bathrooms, showers and toilets, only electrical equipment should be used that is specifically designed for installation in the corresponding areas of these premises in accordance with GOST R 50571.11-96 "Electrical installations of buildings. Part 7. Requirements for special electrical installations. Section 701. Bathrooms and shower rooms", the following requirements must be met:
- - electrical equipment must have a degree of protection against water not lower than:
- in zone 0 - IPx7;
- in zone 1 - IPx5;
- in zone 2 - IPx4 (IPx5 - in public baths);
- in zone 3 - IPx1 (IPx5 - in public baths);
- - in zone 0, electrical appliances with voltages up to 12 V, intended for use in the bath, can be used, and the power source must be located outside this zone:
- - only water heaters can be installed in zone 1;
- - in zone 2 water heaters and lamps of protection class 2 can be installed;
- - in zones 0, 1 and 2, the installation of junction boxes, switchgear and control devices is not allowed.
7.1.48. Installation of plug sockets in bathrooms, showers, soap rooms of baths, rooms containing heaters for saunas (hereinafter referred to as “saunas”), as well as in washing rooms of laundries is not allowed, with the exception of bathrooms in apartments and hotel rooms.
In the bathrooms of apartments and hotel rooms, it is allowed to install plug sockets in zone 3 according to GOST R 50571.11-96, connected to the network through isolation transformers or protected by a residual current device that responds to a differential current not exceeding 30 mA.
Any switches and sockets must be located at a distance of at least 0.6 m from the doorway of the shower stall.
7.1.49. In buildings with a three-wire network (see clause 7.1.36.), plug sockets with a current of at least 10 A with a protective contact must be installed.
Plug sockets installed in apartments, living rooms in dormitories, as well as in rooms for children in children's institutions (kindergartens, nurseries, schools, etc.) must have a protective device that automatically closes the sockets of the socket when the plug is removed.
7.1.50. The minimum distance from switches, sockets and electrical installation elements to gas pipelines must be at least 0.5 m.
In rooms for children in children's institutions (kindergartens, nurseries, schools, etc.), switches should be installed at a height of 1.8 m from the floor.
7.1.52. In saunas, bathrooms, toilets, soap rooms, steam rooms, washing rooms, laundries, etc. installation of switchgear and control devices is not permitted.
In washbasin rooms and zones 1 and 2 (GOST R 50571.11-96) of bathrooms and shower rooms, it is allowed to install switches operated by a cord.
7.1.53. Switching devices for the lighting network of attics containing elements of building structures (roofing, trusses, rafters, beams, etc.) made of flammable materials must be installed outside the attic.
7.1.54. Switches for work, safety and evacuation lighting of premises intended for occupancy large quantity people (for example retail premises shops, canteens, hotel lobbies, etc.) should be accessible only to service personnel.
7.1.55. A lamp should be installed above each entrance to the building.
7.1.56. House license plates and fire hydrant signs installed on exterior walls of buildings must be illuminated. Electric light sources for license plates and hydrant indicators must be powered from the internal lighting network of the building, and fire hydrant indicators installed on external lighting poles must be powered from the external lighting network.
7.1.57. Fire safety devices and security alarms, regardless of the category of reliability of the building's power supply, must be powered from two inputs, and in their absence, by two lines from one input. Switching from one line to another should be automatic.
7.1.58. Electric motors, distribution points, separately installed switching devices and protective devices installed in the attic must have a degree of protection of at least IP44.
Electricity metering
7.1.59. In residential buildings, one single- or three-phase billing meter (with three-phase input) should be installed for each apartment.
7.1.60. Calculation meters in public buildings that house several electricity consumers must be provided for each consumer, isolated in administrative and economic terms (studio, shops, workshops, warehouses, housing maintenance offices, etc.).
7.1.61. In public buildings, estimated electricity meters must be installed on the ASU (main switchboard) at the points of balance demarcation with the energy supply organization. If there are built-in or attached transformer substations, the power of which is fully used by consumers of a given building, the calculated meters should be installed at the low-voltage terminals of power transformers on combined low-voltage switchboards, which are also the building’s ASU.
ASU and metering devices for different subscribers located in the same building may be installed in one common room. By agreement with the energy supplying organization, settlement meters can be installed at one of the consumers, from which the ASU supplies other consumers located in the building. At the same time, control meters should be installed at the inputs of the supply lines in the premises of these other consumers for settlements with the main subscriber.
7.1.62. Estimated meters for the general house load of residential buildings (lighting of staircases, building management offices, yard lighting, etc.) are recommended to be installed in ASU cabinets or on main switchboard panels.
When installing apartment panels in the hallways of apartments, meters, as a rule, should be installed on these panels; installation of meters on floor panels is allowed.
7.1.64. To safely replace a meter directly connected to the network, a switching device must be provided in front of each meter to remove voltage from all phases connected to the meter.
Disconnecting devices for removing voltage from settlement meters located in apartments must be located outside the apartment.
7.1.65. After the meter connected directly to the network, a protection device must be installed. If several lines equipped with protection devices extend after the meter, installation of a common protection device is not required.
Protective Security Measures
7.1.67. Grounding and protective safety measures for electrical installations of buildings must be carried out in accordance with the requirements of Chapter. 1.7 and additional requirements given in this section.
7.1.68. In all rooms, it is necessary to connect the open conductive parts of general lighting fixtures and stationary electrical receivers (electric stoves, boilers, household air conditioners, electric towels, etc.) to the neutral protective conductor.
7.1.69. In building premises, metal cases of single-phase portable electrical appliances and desktop office equipment of class I according to GOST 12.2.007.0-75 "SSBT. Electrical products. General safety requirements" must be connected to the protective conductors of a three-wire group line (see clause 7.1.36.).
The protective conductors must be connected to the metal frames of partitions, doors and frames used for laying cables.
7.1.70. In rooms without increased danger, it is allowed to use pendant lamps that are not equipped with clamps for connecting protective conductors, provided that the hook for their suspension is insulated. The requirements of this paragraph do not cancel the requirements of paragraph 7.1.36. and are not the basis for making two-wire wiring.
7.1.71. To protect group lines supplying plug sockets for portable electrical appliances, it is recommended to provide residual current devices (RCDs).
7.1.72. If the overcurrent protection device (circuit breaker, fuse) does not provide an automatic shutdown time of 0.4 s at a rated voltage of 220 V due to low values of short circuit currents and the installation (apartment) is not covered by a potential equalization system, the installation of an RCD is mandatory.
7.1.73. When installing an RCD, selectivity requirements must be consistently met. With two- and multi-stage circuits, the RCD located closer to the power source must have a setting and response time that is at least 3 times greater than that of the RCD located closer to the consumer.
7.1.74. In the coverage area of the RCD, the neutral working conductor should not have connections with grounded elements and the neutral protective conductor.
7.1.75. In all cases, the use of RCDs must ensure reliable switching of load circuits, taking into account possible overloads.
It is not allowed to use RCDs in group lines that do not have overcurrent protection, without an additional device that provides this protection.
When using RCDs that do not have overcurrent protection, their design verification in overcurrent modes is necessary, taking into account the protective characteristics of the upstream device that provides overcurrent protection.
7.1.77. In residential buildings, it is not allowed to use RCDs that automatically disconnect the consumer from the network in the event of a loss or unacceptable drop in the network voltage. In this case, the RCD must remain operational for a period of at least 5 s when the voltage drops to 50% of the nominal voltage.
7.1.78. In buildings, RCDs of type “A” can be used, which react to both alternating and pulsating fault currents, or “AC”, which react only to alternating leakage currents.
The sources of pulsating current are, for example, washing machines with speed controllers, adjustable light sources, televisions, VCRs, personal computers etc.
7.1.79. In group networks feeding plug sockets, an RCD with a rated operating current of no more than 30 mA should be used.
It is allowed to connect several group lines to one RCD through separate circuit breakers (fuses).
Installation of RCDs in lines supplying stationary equipment and lamps, as well as in general lighting networks, is usually not required.
7.1.81. The installation of RCDs is prohibited for electrical receivers, the disconnection of which could lead to situations dangerous for consumers (disabling the fire alarm, etc.).
7.1.82. It is mandatory to install an RCD with a rated operating current of no more than 30 mA for group lines supplying outlet networks located outdoors and in particularly dangerous and hazardous areas. increased danger, for example in zone 3 of bathrooms and shower rooms in apartments and hotel rooms.
7.1.83. The total leakage current of the network, taking into account the connected stationary and portable electrical receivers in normal operation, should not exceed 1/3 of the rated current of the RCD. In the absence of data, the leakage current of electrical receivers should be taken at the rate of 0.4 mA per 1 A of load current, and the network leakage current at the rate of 10 μA per 1 m of phase conductor length.
7.1.84. To increase the level of fire protection during short circuits to grounded parts, when the current value is insufficient to trigger the maximum current protection, at the entrance to an apartment, individual house, etc. It is recommended to install an RCD with a trip current of up to 300 mA.
7.1.85. For residential buildings, subject to the requirements of clause 7.1.83. RCD functions according to paragraphs. 7.1.79. and 7.1.84. can be performed by one device with an operating current of no more than 30 mA.
7.1.86. If the RCD is intended to protect against damage electric shock and fire or only for protection against fire, then it must disconnect both the phase and neutral working conductors; overcurrent protection in the neutral working conductor is not required.
7.1.87. At the entrance to the building, a potential equalization system must be installed by combining the following conductive parts:
- main (main) protective conductor;
- main (main) grounding conductor or main grounding clamp;
- steel pipes for communications between buildings and between buildings;
- metal parts of building structures, lightning protection, central heating, ventilation and air conditioning systems. Such conductive parts must be connected to each other at the entrance to the building.
7.1.88. All open conductive parts of stationary electrical installations, third-party conductive parts and neutral protective conductors of all electrical equipment (including plug sockets) must be connected to the additional potential equalization system.
For bathrooms and shower rooms, an additional potential equalization system is mandatory and must include, among other things, the connection of third-party conductive parts extending outside the premises. If there is no electrical equipment with neutral protective conductors connected to the potential equalization system, then the potential equalization system should be connected to the PE bus (clamp) at the input. Heating elements embedded in the floor must be covered with a grounded metal mesh or a grounded metal shell connected to a potential equalization system. As additional protection for heating elements, it is recommended to use an RCD with a current of up to 30 mA.
It is not allowed to use local potential equalization systems for saunas, baths and shower rooms.
Rules for the construction of electrical installations (PUE) are the main regulatory and technical document that guides designers when calculating electrical installations of all types and modifications.
In other words, PUE are rules that describe the principles of constructing electrical devices, as well as the basic requirements for power systems, electrical components, elements and communications.
In fact, the PUE is the Bible and the main reference book for any qualified electrician. If a master comes to you who does not know what the Electrical Installation Rules are, he is not an electrician. Hit him in the neck.
The rules described in the PUE apply to newly constructed or reconstructed electrical installations of direct and alternating current with voltage up to 750 (kV), including special electrical installations.
Currently on site Russian Federation The PUE is valid in the form of separate sections and chapters of the 7th edition and current sections and chapters of the 6th edition.
History of the creation of the Rules
PUE has existed for more than 65 years (the first edition was published back in 1949). Due to the constant development of technology, the emergence of new technologies, and increased requirements for electrical safety and reliability of electrical installations, these rules are continuously supplemented and revised.
For example, the fifth edition was published in separate sections from 1976 to 1982. PUE 6 was developed and put into effect by the USSR Ministry of Energy and Electrification on June 1, 1985, and most of it is still in effect today.
The outdated chapters of PUE 6 are gradually being replaced by the corresponding chapters of PUE 7, as they are developed taking into account the most modern GOSTs, SNiPs and recommendations of working groups. Thus, the 6th edition of the PUE is still valid, with the exception of some outdated chapters (see the list below).
In the period from 2000 to 2003, the following chapters of PUE 6 lost force (and accordingly chapters of PUE 7 came into force):
- July 1, 2000 - section 6 in its entirety, as well as chapters 7.1, 7.2;
- January 1, 2003 - chapters 1.1, 1.2, 1.7, 7.5, 7.6;
- September 1, 2003 - Chapter 1.8;
- October 1, 2003 - chapters 2.4, 2.5;
- November 1, 2003 - chapters 4.1, 4.2.
How does the PUE 7th edition differ from the PUE 6?
The published sections and chapters of PUE-7 tightened the electrical safety requirements, which began to practically comply with international standards and standards. Some concepts were also introduced, for example:
- TN-S grounding system;
- grounding system TN-C-S;
- TN-C grounding system;
- CT grounding system;
- IT grounding system;
- protective grounding has replaced the concept of grounding;
- etc.
I would like to note that PUE-7 still does not take into account the requirements for the protection of electrical installations from fires in accordance with GOST R 50571.17-2000, from overvoltages during ground faults in electrical installations above 1000 (V), from switching and lightning overvoltages and discharges in accordance with GOST R 50571.19-2000, GOST R 50571.18-2000 and GOST R 50571.20-2000. Thus, it is obvious that PUE 7 is not a complete publication, and will certainly be supplemented in the future.
On our website is presented, consisting of the PUE of the 6th edition with all the chapters from the 7th edition that have entered into force. Thus, this is the most complete and up-to-date version of the Electrical Installation Rules taking into account all official changes and additions.
You can also (PDF, 3 MB) to print it on paper.
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