GOST 50571.25-2001 UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Part 7: Requirements for special installations Electrical installations of buildings and structures with electrically heated floors and surfaces of Electrical installations of buildings. Part 7. Requirements for special installations. Electrical installations of buildings and structures with electrical heating of floors and surfaces ACS 91.140.50 OKS 3402 Effective date 1/7/2002 Preface 1 to develop the All-Russian Research Institute for Electrification of Agriculture (VIESKh) and the All-Russian Research Institute of Standardization and Certification Engineering (VNIINMASH) with the participation of OOO "Special Systems and Technologies INTRODUCED Standardization Technical Committee TC 337" Electrical installations of buildings ", 2 adopted and put into operation the Decree of the State Standard of Russia on Dec. 24, 2001 № 570-v. 3 first introduced Introduction The standard supplements set state standards for electrical installations of buildings, developed by the Technical Committee for Standardization TC 337 "Electrical installations of buildings" on the basis of standard International Electrotechnical Commission IEC 364 "Electrical installations of buildings." Need to develop a standard due to the fact that the electrically heated floors and surfaces are now widely used in housing construction and many other industries, including agriculture. Buildings with electrically heated floors are usually used in cases where necessary to ensure the most favorable temperature distribution along the height of the room. Surface of the floor in such premises is heated to 25-30 ° C and air at a height of 2 m has a temperature of 18-20 ° C, which creates the most comfortable conditions for people. This distribution of temperature causes a slight convection currents, leading to minimal recovery of dust from the floor. Electrically heated floors appropriate to use in bathrooms and showers, baths, sanitary inspection, and other areas. When the thickness of the layer of concrete not less than 10 cm, which is incorporated in the heating cable, the important role played by thermal storage capacity electrically heated floors store heat in its thicker and thus maintain long-term temperature when power is turned off, which allows multi-tariff electricity prices off the heating system in time of high prices (usually during daytime peak loads in the network) and re-engage during the action of low prices (in the night period). Application of automatic temperature control, taking into account proceeds of heat from people, animals, appliances, and the sun contributes to the problem of energy conservation. Distributed electrical heating suitable for heating the complex form with a significant temperature differences in different areas of the room and even outdoors. For example, for heating the surfaces of playing fields or open stadiums for the periodic heating in the winter the surface of pens in the country's southern regions, where year-round, even in winter contain cattle in the open air. Feasibility of this heat must be supported by technical and economic calculations. Scope of this standard is limited primarily to the inner rooms of buildings with electrically heated floors with the inception of the heating cable in the concrete floor, but some requirements of the standard can be extended to other objects with electrically heated surfaces. 1 Scope This standard applies to electrical installations of buildings and structures with electrically heated floors and surfaces used in various sectors of the economy, and establishes requirements for specified facilities, primarily to ensure electrical safety. Scope of this standard is limited primarily to the inner rooms of buildings with electrically heated floors with the inception of the heating cable in the concrete floor, but some requirements of the standard can be extended to other objects with electrically heated surfaces, such as industrial, agricultural, commercial, entertainment, household and Other buildings, including outdoors, such as open stadiums, the hills in the subways, open paddocks for year-round cattle in the open air in livestock farms of southern regions of the country, etc. The heated surface can be roof of the house, if it is equipped with anti-icing device, the surface of a football field to create a comfortable environment to players in a cold, etc. It is intended to design, installation, commissioning and maintenance organizations of all forms of ownership. The requirements of this standard are mandatory. 2 Normative references in this standard references to the following standards: GOST 12.1.004-91 safety standards system. Fire safety. General requirements of GOST 27.002-89 Reliability in Engineering. Basic concepts. Terms and definitions GOST 10434-82 electrical contact connections. Classification. General technical requirements GOST 14254-96 (IEC 529-89) Degrees of protection provided by enclosures (code IP) GOST 26445-85 WIRES isolated. General specifications GOST 30331.1-95 (IEC 364-1-72, IEC 364-2-70) / GOST 50571.1-93 (IEC 364-1-72, IEC 364-2-70) Electrical installations of buildings. Key provisions of GOST 30331.2-95 (IEC Zb4-3-93) / GOST 50571.2-94 (IEC 364-3-93) Electrical installations of buildings. Part 3. Key features Standard 30331.3-95 (IEC 364-4-41-92) / GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock 30331.4-95 Standard (IEC 364-4-42-80) / GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects GOST R IEC 245-1-97 Rubber insulated cables of rated voltages up to and including 450/750. General requirements of GOST R IEC 245-3-97 Rubber insulated cables of rated voltages up to and including 450/750. Cables with heat resistant silicone insulated GOST R 50462-92 (IEC 446-89) Identification of conductors by colors or numerals GOST R 50509-93 (IEC 391-72) Marking of insulated conductors GOST 50571.14-96 (IEC 364-7-705 - 84) Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock premises GOST 50571.16-99 (IEC 60364-6-61-86) Electrical installations of buildings. Part 6. Test. Chapter 61. Acceptance tests GOST 50571.17-2000 (IEC 60364-4-482-82) Electrical installations of buildings. Part 4. Security requirements. Chapter 48. The choice of measures of protection depending on external conditions. Section 482. Fire protection GOST 51326.1-99 (IEC 61008-1-96) Power switches, controlled differential current for household and similar purposes without a built-in overcurrent protection. Part 1. General requirements and test methods GOST 51327.1-99 (IEC 61009-1-96) Power switches, controlled by the differential current household and similar applications with built-in overcurrent protection. Part 1. General requirements and test methods to GOST R IEC 61140-2000 protection against electric shock. General provisions for the security afforded by electrical equipment and installations in their relationship 3 Definitions In this standard, the following terms and definitions. 3.1 Main heating system: The heating system of the building (structure) that contains the installation of heating, always providing a warm room and other facilities during the heating season, for example, the system of central water heating, stove heating, electric heating, etc. 3.2 Additional heating system: The heating system of the building (structures), which contains the installation of heating, periodically providing a warm room temperature decreases below the required for creating indoor comfort conditions in conjunction with the main heating system and located in the premises of persons, livestock and other heat-generating objects. Additional heating system includes, as a rule, a device that monitors and automatically maintains the room or another object in the given temperature. 3.3 Universal heating system: The heating system of the building (structure), which combines the properties of both the main and supplemental heating systems. 3.4 Local electrical heating system: The collection in the building of separate compact heaters (heaters, elektroreflektorov, etc.). 3.5 Installing the distributed electric heating: A group of functionally interconnected electric heating sections of different types (cable, film, plate), wiring accessories general, cables and electrical wiring for external connections of electric heating elements with control cabinet or the power supply, as well as mechanical fasteners and protective elements . 3.6 Distributed electrical heating system: One or more occupants of the building or construction of installations of the distributed electric heating. 3.7 Electric Section (hot section): The design consists of a distributed electric heating elements, connector and end couplings, mounting security and protection of wires or cables are designed to heat the building elements (eg, gender) structures of various objects and products. 3.8 Distributed electric heating element (distributed heating element): Stretching the product, part of the electric heating section, which converts electrical energy into heat for heating. 3.9 Electric cable section: Electric Section, which as a distributed electric heating element using a single or multi-core heating cable. 3.10 film an electrical section: Electric Section, which as a distributed electric heating element used a heating tape. 3.11 lamellar Electric Section: Electric Section, which as a distributed heating element using a heating plate. 3.12 Heating Cable: Cable product, designed to convert electrical energy into heat for heating. Distinguish between single-and multi-core heating cable with a braided screen, which provides electrical and mechanical protection and prevents the propagation of electromagnetic fields, or without it. Cable insulation, as a rule, double, and subjected to special treatment, making it non-flammable and non-consumable. The outer layer of insulation can be more durable to protect the cable from damage caused by mechanical loads. 3.13 self-regulating heating cable: Heating cables with two parallel current-carrying conductors, between which the entire length of the heating portion is made of a semiconductor temperature-dependent material that changes its resistance depending on temperature and, hence, change and emissions of heat energy. 3.14 hot film: Electrical goods made in the form of single or multilayer flexible film or a woven material that contains elements designed to convert electrical energy into heat for heating or itself being such an element. 3.15 Hot Plate: Electrical goods made in the form of rigid plates, whose dimensions are much higher than its thickness, which contains elements designed to convert electrical energy into heat for heating or itself being such an element. 3.16 mounting ends (cold end): Elements of electric heating section, made of insulated differing in color and position of power wires (or cables with different color conductors) of a certain section, to link the electric heating element heating section with the electrical network. 3.17 coupling: Control electric heating cable sections, designed for electrical and mechanical connections lived heating cable with mounting ends or strands of another heating cable (if necessary, a serial connection between two or more heating cables) and to seal the connection. 3.18 connector: Control electric heating film or plate sections designed for electrical and mechanical connection of the heating film or plate with mounting ends and to seal the connection. 3.19 end sleeve: Control electric heating cable sections, designed for electrical and mechanical connection of the heating cable had lived together with the sealing and mechanical protection of joints, or just to seal and protect the end of the section, which is not attached mounting ends. 3.20 normalized power electric heating section: Power (in watts), electric heating allocated section in the specified temperature conditions, for example at 20 ° C. 3.21 rated power electric heating section: Power (in watts) used in the calculations when determining the linear or surface heat. 3.22 installed capacity of electric heating section: maximum power (in watts), electric heating allocated section in a specified range of conditions of its operation. 3.23 operating voltage electric heating section: Nominal effective stress, which provides for maintenance of electric heating section. 3.24 Operating temperature electric heating section: Maximum continuous exposure to the insulation of electric heating elements the temperature (in Celsius), electric heating section, under the operating voltage. 3.25 maximum temperature electric heating section: Maximum temperature (degrees Celsius) set for the electric heating section, not under the operating voltage due to the properties of materials used in the production section. 3.26 Land: According to GOST R IEC 61140. 3.27 Local land: According to GOST R IEC 61140. 3.28 exposed conductive part: According to GOST R IEC 61140. 3.29 sided conductive part: According to GOST R IEC 61140. 3.30 live parts: According to GOST R IEC 61140. 3.31 touch voltage: According to GOST R IEC 61140. 3.32 Rated voltage contact: According to GOST R IEC 61140. 3.33 step voltage: According to GOST R IEC 61140. 3.34 grounding system power supply (mains earthing system, the system grounding earthing system): The sum of the substation grounding system, grounding system exposed conductive parts of the consumer and the neutral (and sometimes phase) conductor in electrical voltage to 1 kV. 3.35 type of system grounding electrical network (a type of power supply): The indicator on the ratio of neutral to ground (or phase) of the transformer at the substation and the exposed conductive parts of the consumer and device neutral conductor. Designation of types of earthing systems - according to GOST R 50571.2 30331.2/GOST. 3.36 equipotential: According to GOST R IEC 61140. 3.37 equipotential providing protection: According to GOST R IEC 61140. 3.38 Equipotential bonding: According to GOST R IEC 61140. 3.39 alignment system of electric potentials (the device alignment of electric potentials, the short UVEP): According to GOST R IEC 61140. 4 General requirements 4.1 System distributed electric heating is recommended for heating buildings and structures as the primary, complementary and versatile heating systems, primarily in the premises and facilities with cold floors (metlahskaya tiles, tile, concrete, marble, asphalt, metal perforated cover and etc.), as well as freestanding buildings and in cases of inability to use the centralized heating systems. They are also encouraged to use as icing systems for roofs, drainage systems, covering roads, sidewalks, subways, heating systems, pipelines, tanks and processing equipment. In the agricultural production system should be used primarily for floor heating in the stalls and crates of detention of young animals (pigs, lambs and calves) in growing pigs, sheep and cattle, as well as in greenhouses, and greenhouses to create a good climate. 4.2 The surface temperature of electrical heating units distributed shall not exceed the values ??established by the construction and sanitary norms and rules. 4.3 Installation of the distributed electric heating shall be equipped with automatic systems to maintain the desired temperature, or be designed so that in the absence of temperature control was excluded the possibility of exceeding the maximum permissible temperature for a given object, and use of electric heating sections. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. Is often perceived electromechanical devices GOST 2.757-81 * Unified system for design documentation. Graphical symbols in diagrams. Elements of the switching field for switching systems GOST 2.758-81 Unified system for design documentation. Graphical symbols in diagrams. Signal Technology GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Device with a pulse-code modulation GOST 2.764-86 Unified system for design documentation. Graphical symbols in electrical circuits. Integrated optoelectronic display elements GOST 2.768-90 Unified system for design documentation. Graphical symbols in diagrams.
GOST 50571.25-2001 UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Part 7: Requirements for special installations Electrical installations of buildings and structures with electrically heated floors and surfaces of Electrical installations of buildings. Part 7. Requirements for special installations. Electrical installations of buildings and structures with electrical heating of floors and surfaces ACS 91.140.50 OKS 3402 Effective date 1/7/2002 Preface 1 to develop the All-Russian Research Institute for Electrification of Agriculture (VIESKh) and the All-Russian Research Institute of Standardization and Certification Engineering (VNIINMASH) with the participation of OOO "Special Systems and Technologies INTRODUCED Standardization Technical Committee TC 337" Electrical installations of buildings ", 2 adopted and put into operation the Decree of the State Standard of Russia on Dec. 24, 2001 № 570-v. 3 first introduced Introduction The standard supplements set state standards for electrical installations of buildings, developed by the Technical Committee for Standardization TC 337 "Electrical installations of buildings" on the basis of standard International Electrotechnical Commission IEC 364 "Electrical installations of buildings." Need to develop a standard due to the fact that the electrically heated floors and surfaces are now widely used in housing construction and many other industries, including agriculture. Buildings with electrically heated floors are usually used in cases where necessary to ensure the most favorable temperature distribution along the height of the room. Surface of the floor in such premises is heated to 25-30 ° C and air at a height of 2 m has a temperature of 18-20 ° C, which creates the most comfortable conditions for people. This distribution of temperature causes a slight convection currents, leading to minimal recovery of dust from the floor. Electrically heated floors appropriate to use in bathrooms and showers, baths, sanitary inspection, and other areas. When the thickness of the layer of concrete not less than 10 cm, which is incorporated in the heating cable, the important role played by thermal storage capacity electrically heated floors store heat in its thicker and thus maintain long-term temperature when power is turned off, which allows multi-tariff electricity prices off the heating system in time of high prices (usually during daytime peak loads in the network) and re-engage during the action of low prices (in the night period). Application of automatic temperature control, taking into account proceeds of heat from people, animals, appliances, and the sun contributes to the problem of energy conservation. Distributed electrical heating suitable for heating the complex form with a significant temperature differences in different areas of the room and even outdoors. For example, for heating the surfaces of playing fields or open stadiums for the periodic heating in the winter the surface of pens in the country's southern regions, where year-round, even in winter contain cattle in the open air. Feasibility of this heat must be supported by technical and economic calculations. Scope of this standard is limited primarily to the inner rooms of buildings with electrically heated floors with the inception of the heating cable in the concrete floor, but some requirements of the standard can be extended to other objects with electrically heated surfaces. 1 Scope This standard applies to electrical installations of buildings and structures with electrically heated floors and surfaces used in various sectors of the economy, and establishes requirements for specified facilities, primarily to ensure electrical safety. Scope of this standard is limited primarily to the inner rooms of buildings with electrically heated floors with the inception of the heating cable in the concrete floor, but some requirements of the standard can be extended to other objects with electrically heated surfaces, such as industrial, agricultural, commercial, entertainment, household and Other buildings, including outdoors, such as open stadiums, the hills in the subways, open paddocks for year-round cattle in the open air in livestock farms of southern regions of the country, etc. The heated surface can be roof of the house, if it is equipped with anti-icing device, the surface of a football field to create a comfortable environment to players in a cold, etc. It is intended to design, installation, commissioning and maintenance organizations of all forms of ownership. The requirements of this standard are mandatory. 2 Normative references in this standard references to the following standards: GOST 12.1.004-91 safety standards system. Fire safety. General requirements of GOST 27.002-89 Reliability in Engineering. Basic concepts. Terms and definitions GOST 10434-82 electrical contact connections. Classification. General technical requirements GOST 14254-96 (IEC 529-89) Degrees of protection provided by enclosures (code IP) GOST 26445-85 WIRES isolated. General specifications GOST 30331.1-95 (IEC 364-1-72, IEC 364-2-70) / GOST 50571.1-93 (IEC 364-1-72, IEC 364-2-70) Electrical installations of buildings. Key provisions of GOST 30331.2-95 (IEC Zb4-3-93) / GOST 50571.2-94 (IEC 364-3-93) Electrical installations of buildings. Part 3. Key features Standard 30331.3-95 (IEC 364-4-41-92) / GOST 50571.3-94 (IEC 364-4-41-92) Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock 30331.4-95 Standard (IEC 364-4-42-80) / GOST 50571.4-94 (IEC 364-4-42-80) Electrical installations of buildings. Part 4. Security requirements. Protection against thermal effects GOST R IEC 245-1-97 Rubber insulated cables of rated voltages up to and including 450/750. General requirements of GOST R IEC 245-3-97 Rubber insulated cables of rated voltages up to and including 450/750. Cables with heat resistant silicone insulated GOST R 50462-92 (IEC 446-89) Identification of conductors by colors or numerals GOST R 50509-93 (IEC 391-72) Marking of insulated conductors GOST 50571.14-96 (IEC 364-7-705 - 84) Electrical installations of buildings. Part 7. Requirements for special installations. Section 705. Electrical installations of agricultural and livestock premises GOST 50571.16-99 (IEC 60364-6-61-86) Electrical installations of buildings. Part 6. Test. Chapter 61. Acceptance tests GOST 50571.17-2000 (IEC 60364-4-482-82) Electrical installations of buildings. Part 4. Security requirements. Chapter 48. The choice of measures of protection depending on external conditions. Section 482. Fire protection GOST 51326.1-99 (IEC 61008-1-96) Power switches, controlled differential current for household and similar purposes without a built-in overcurrent protection. Part 1. General requirements and test methods GOST 51327.1-99 (IEC 61009-1-96) Power switches, controlled by the differential current household and similar applications with built-in overcurrent protection. Part 1. General requirements and test methods to GOST R IEC 61140-2000 protection against electric shock. General provisions for the security afforded by electrical equipment and installations in their relationship 3 Definitions In this standard, the following terms and definitions. 3.1 Main heating system: The heating system of the building (structure) that contains the installation of heating, always providing a warm room and other facilities during the heating season, for example, the system of central water heating, stove heating, electric heating, etc. 3.2 Additional heating system: The heating system of the building (structures), which contains the installation of heating, periodically providing a warm room temperature decreases below the required for creating indoor comfort conditions in conjunction with the main heating system and located in the premises of persons, livestock and other heat-generating objects. Additional heating system includes, as a rule, a device that monitors and automatically maintains the room or another object in the given temperature. 3.3 Universal heating system: The heating system of the building (structure), which combines the properties of both the main and supplemental heating systems. 3.4 Local electrical heating system: The collection in the building of separate compact heaters (heaters, elektroreflektorov, etc.). 3.5 Installing the distributed electric heating: A group of functionally interconnected electric heating sections of different types (cable, film, plate), wiring accessories general, cables and electrical wiring for external connections of electric heating elements with control cabinet or the power supply, as well as mechanical fasteners and protective elements . 3.6 Distributed electrical heating system: One or more occupants of the building or construction of installations of the distributed electric heating. 3.7 Electric Section (hot section): The design consists of a distributed electric heating elements, connector and end couplings, mounting security and protection of wires or cables are designed to heat the building elements (eg, gender) structures of various objects and products. 3.8 Distributed electric heating element (distributed heating element): Stretching the product, part of the electric heating section, which converts electrical energy into heat for heating. 3.9 Electric cable section: Electric Section, which as a distributed electric heating element using a single or multi-core heating cable. 3.10 film an electrical section: Electric Section, which as a distributed electric heating element used a heating tape. 3.11 lamellar Electric Section: Electric Section, which as a distributed heating element using a heating plate. 3.12 Heating Cable: Cable product, designed to convert electrical energy into heat for heating. Distinguish between single-and multi-core heating cable with a braided screen, which provides electrical and mechanical protection and prevents the propagation of electromagnetic fields, or without it. Cable insulation, as a rule, double, and subjected to special treatment, making it non-flammable and non-consumable. The outer layer of insulation can be more durable to protect the cable from damage caused by mechanical loads. 3.13 self-regulating heating cable: Heating cables with two parallel current-carrying conductors, between which the entire length of the heating portion is made of a semiconductor temperature-dependent material that changes its resistance depending on temperature and, hence, change and emissions of heat energy. 3.14 hot film: Electrical goods made in the form of single or multilayer flexible film or a woven material that contains elements designed to convert electrical energy into heat for heating or itself being such an element. 3.15 Hot Plate: Electrical goods made in the form of rigid plates, whose dimensions are much higher than its thickness, which contains elements designed to convert electrical energy into heat for heating or itself being such an element. 3.16 mounting ends (cold end): Elements of electric heating section, made of insulated differing in color and position of power wires (or cables with different color conductors) of a certain section, to link the electric heating element heating section with the electrical network. 3.17 coupling: Control electric heating cable sections, designed for electrical and mechanical connections lived heating cable with mounting ends or strands of another heating cable (if necessary, a serial connection between two or more heating cables) and to seal the connection. 3.18 connector: Control electric heating film or plate sections designed for electrical and mechanical connection of the heating film or plate with mounting ends and to seal the connection. 3.19 end sleeve: Control electric heating cable sections, designed for electrical and mechanical connection of the heating cable had lived together with the sealing and mechanical protection of joints, or just to seal and protect the end of the section, which is not attached mounting ends. 3.20 normalized power electric heating section: Power (in watts), electric heating allocated section in the specified temperature conditions, for example at 20 ° C. 3.21 rated power electric heating section: Power (in watts) used in the calculations when determining the linear or surface heat. 3.22 installed capacity of electric heating section: maximum power (in watts), electric heating allocated section in a specified range of conditions of its operation. 3.23 operating voltage electric heating section: Nominal effective stress, which provides for maintenance of electric heating section. 3.24 Operating temperature electric heating section: Maximum continuous exposure to the insulation of electric heating elements the temperature (in Celsius), electric heating section, under the operating voltage. 3.25 maximum temperature electric heating section: Maximum temperature (degrees Celsius) set for the electric heating section, not under the operating voltage due to the properties of materials used in the production section. 3.26 Land: According to GOST R IEC 61140. 3.27 Local land: According to GOST R IEC 61140. 3.28 exposed conductive part: According to GOST R IEC 61140. 3.29 sided conductive part: According to GOST R IEC 61140. 3.30 live parts: According to GOST R IEC 61140. 3.31 touch voltage: According to GOST R IEC 61140. 3.32 Rated voltage contact: According to GOST R IEC 61140. 3.33 step voltage: According to GOST R IEC 61140. 3.34 grounding system power supply (mains earthing system, the system grounding earthing system): The sum of the substation grounding system, grounding system exposed conductive parts of the consumer and the neutral (and sometimes phase) conductor in electrical voltage to 1 kV. 3.35 type of system grounding electrical network (a type of power supply): The indicator on the ratio of neutral to ground (or phase) of the transformer at the substation and the exposed conductive parts of the consumer and device neutral conductor. Designation of types of earthing systems - according to GOST R 50571.2 30331.2/GOST. 3.36 equipotential: According to GOST R IEC 61140. 3.37 equipotential providing protection: According to GOST R IEC 61140. 3.38 Equipotential bonding: According to GOST R IEC 61140. 3.39 alignment system of electric potentials (the device alignment of electric potentials, the short UVEP): According to GOST R IEC 61140. 4 General requirements 4.1 System distributed electric heating is recommended for heating buildings and structures as the primary, complementary and versatile heating systems, primarily in the premises and facilities with cold floors (metlahskaya tiles, tile, concrete, marble, asphalt, metal perforated cover and etc.), as well as freestanding buildings and in cases of inability to use the centralized heating systems. They are also encouraged to use as icing systems for roofs, drainage systems, covering roads, sidewalks, subways, heating systems, pipelines, tanks and processing equipment. In the agricultural production system should be used primarily for floor heating in the stalls and crates of detention of young animals (pigs, lambs and calves) in growing pigs, sheep and cattle, as well as in greenhouses, and greenhouses to create a good climate. 4.2 The surface temperature of electrical heating units distributed shall not exceed the values ??established by the construction and sanitary norms and rules. 4.3 Installation of the distributed electric heating shall be equipped with automatic systems to maintain the desired temperature, or be designed so that in the absence of temperature control was excluded the possibility of exceeding the maximum permissible temperature for a given object, and use of electric heating sections. Performing a temperature calculation of the installation of the distributed electric heating is not equipped to handle temperature control, consider the flow of heat from being in a room of people, farm animals, household appliances and lighting, the elements of hot water and solar heat. 4.4 When designing a system of distributed electric heating for use in a building or structure as an extra, should include the ability to perform its functions at any major (minimum requirements for heating) for emergency shutdown in the building or the construction of the main heating system (for example, in the breakout Hot water central hot water heating), so that she could provide in the premises of the required minimum temperature, which excludes, for example, the defrost system. 4.5 In carrying out thermal calculations of distributed electric heating of concrete floor with a minimum thickness of 10 cm, which is incorporated in the heating cable, you must take into account the heat storage capacity, allowing heat to accumulate in the thickness of the floor and thus maintain long-term thermal conditions in the room when the power is off, which reduces operating costs the introduction of multi-tariff scale electricity prices, because at the time of the highest tariff system can disable and re-engage during the term of the lowest fare (usually at night). 4.6 Setting up a part of fire safety shall conform to GOST 12.1.004. 4.7 Development, coordination, approval, and the composition of project documentation for the installation of the distributed electric heating - on SNiP 11-01-95 [1]. 5 Requirements 5.1 To ensure electrical safety of electrical power plants distributed electric heating should be done on the electrical grids of up to 1 kV earthing systems of all types, namely: TN-C, TN-S, TN-CS, TT neutral conductor and the grounded source Power, TT-earthed phase power supply, IT-earthed through a high resistance neutral power, IT-earthed through a high resistance phase power source. The principal electrical wiring diagrams are shown in figures B.1-B.5 of Annex B. 5.2 The electrical circuit of the distributed electric heating units should be given in the technical specifications of the manufacturer. 5.3 The main protection against electric shock in electrical distributed electric heating is double or reinforced insulation of live parts of distributed electric heating elements (heating and electric heating cable subsidiary veins, carrying parts assembly ends, heating films, current-carrying elements of the electric heating plates). Additional protection is to use a residual current circuit breakers (ASDC), GOST 51327.1 breakers and residual current (VDT), GOST 51326.1 with a metal sheath or armor helix electric heating cable, fiber electric heating-screen film (plate) or UVEP as shown in Figure B. 6. 5.4 Use of VDT without overcurrent protection devices installed to VDT (assuming the direction from the power source) is not allowed. 5.5 Nominal tripping differential current circuit breaker residual current should not exceed 30 mA. 5.6 After installation of electrical heating units distributed in the rooms, equipped with security systems low voltage BSNN, FSNN and ZSNN 31331.3/GOST GOST R 50571.3, it is necessary to exclude all cases of possible voltage transition from these plants on these systems. 5.7 The high-risk premises, such as baths, showers, sanitary inspection, pedestrian crossings and other similar places where people may be without shoes on a wet floor, it is necessary, along with ASDC as other additional measures of protection against electric shock applied electric alignment building, providing protection, with protection functions UVEP must be confirmed by calculation. 5.8 Alignment of electrical potentials that protects, in addition to ASDC, should be used in electrical heating units distributed along with the condition specified in 5.5, as well as in all other cases as a distributed electric heating element is used heating cables without shielding metallic braid or without helix armor of galvanized steel wires, as well as heating of the film and plates without protective shielding metal layers (see Figure B.6). 5.9 Devices alignment electrical potential should be electronically integrated with the containment system equalizing electrical potentials. Places of electrical contact of metal on both systems must be made by welding, crimping, or reliable bolted, excluding spontaneous weakening of contact (class contact compound 2 according to GOST 10434). 5.10 Other requirements Electrical - on SNIP III-4-80 [2] and GOST R 50571.3 30331.3/GOST. 6 Requirements for the construction of electric heating section 6.1 Electric install section of the distributed electric heating should include a distributed electric heating element (cable, film, plate), installation tips, and a connector terminations in relation to the two-conductor electric heating cable, or two joints in relation to a single conductor electric heating cable, connectors device applied to an electrical heating tape and plate. 6.2 Electric heating cables are manufactured in accordance with the requirements of GOST R IEC 245-1 and GOST R IEC 245-3, standards or technical specifications on the cables of specific brands, design and technological documentation, duly approved. Cable may be solid, with one two-core heating and the second auxiliary core, two-core of the two heating wires, three-conductor of the two heaters and one auxiliary wires, as well as multicore. Auxiliary vein should be made of annealed copper wires. The cable must be double or reinforced insulation from heat-resistant fire-retardant and non-melting polymer material (specially treated polyethylene, plasticized polyvinylchloride, etc.), over which it must be metal braided shield (or armor annealed), which provides mechanical and electrical protection and prevents propagation of electromagnetic fields. On top of the cable sheath, to protect it from corrosion, should be imposed shell of polymer flame retardant. If the design of heating device provides protection to the cable sheath from corrosion, eg by means of thermal insulation, the presence of a shell on top of braid is not mandatory. Allowed to use electric heating cable without shielding or armor helix with the application UVEP, protective functions of which are confirmed by calculation. 6.3 Contact link assembly ends and lived cable crimping perform only in accordance with GOST 10434, a class of compound 2, which provides a reliable electrical contact, crimping space shall be sealed by the coupler. 6.4 Mounting the ends must be in color or marked with color-coded so that you can identify the end, connected to the heating cable conductor, from the end of which is connected with an auxiliary housing, and from the end connected to the braided shield, marked by yellow-green. 6.5 is not allowed to shorten the electric heating cable (excluding self) and replace the ends of the assembly, disrupting compounds in the sleeve, made by the manufacturer. 6.6 Do not, even briefly, include electric heating cable network, collapsed into the bay. 6.7 Do not include the section of electric heating cables, electric heating film and plates to the power grid, the voltage which does not correspond to the nominal operating voltage indicated on the label or packaging. 6.8 Electric heating cables should be laid only on non-flammable or flame retardant base. 6.9 At sites where difficult or inappropriate use of the automatic temperature control (thermostats) and temperature sensors, such as heating pipes, roof edges, etc., the heating section shall be made of a self-regulating heating cable. 6.10 The design of sections with electrical heating tapes and plates should provide double or reinforced electrical isolation and, moreover, have shielded the surface. 6.11 Cable, film and plate electric heating section, in the operation of which may interact with a chemically active medium must be resistant to this environment. 6.12 Temperature field on the surface of the electric heating film or plates must be uniform, and the surface temperature should not exceed 95 ° C. Note - For electrically heated plates, designed to warm floors in the stables, the maximum power density should not exceed 300 W/m2. 7 Requirements of parameters and labeling of electric heating section 7.1 passport for each electric heating section by a manufacturer should specify the operating voltage (in volts), standardized power section (in watts), the linear heat (in watts per meter) long section (in meters) . 7.2 The passport for each film or plate-electric heating section by a manufacturer should specify the operating voltage (in volts), standardized power section (in watts), the surface heat (in watts per square meter) area of ??the section (square meters) or external dimensions (in meters). 7.3 Lower Bound MTBF live parts and electrical insulation of the distributed electric heating element section, laid in a concrete screed floor or other surface shall be not less than 20 years with a confidence level of not less than 0,9. At the same warranty period for the assembled and included in the work of electric heating section shall not be less than 16 years. 7.4 Heat transfer per unit floor area of ??residential premises, equipped with electrical heating system of the distributed, should be 80-150 W/m2. The upper limit corresponds to a poorly insulated and placed in cold regions, the bottom - a place with good insulation and southern regions. For rooms with high heat insulation should be 100-120 W/m2. Heat transfer in teploakkumulyatornyh heating systems should not exceed 200 W/m2. Quality insulation facilities shall be determined by calculating the thermal characteristics of the building in accordance with SNIP II-3-79 [3]. 7.5 To ensure specified in 7.4 is necessary to heat the premises of a certain area to apply one or more electric heating sections with certain parameters - nominal capacity and length. Electric heating cable sections of varying thickness and length shall differ in color and markings. Appendix A lists the parameters and color coding of other electric heating cable sections. 7.6 for indoors is supposed to apply a distributed installation of electrical heating, consisting of two or more single-color or multi-colored electric heating cable sections. 7.7 For each installation of the distributed electric heating should specify the type of premises for which the plant is acquired, its area, and the total nominal installed capacity of the whole setup, the number of its member electric heating section, and color of each section, their lengths and power ratings. 7.8 Electric heating section, in which there is no protective screen, such as electric heating cable without screen braiding and helix without reservation, shall be fitted with solid mounting ends are usually blue. Apply such section is permitted only at presence UVEP to 6.2. 7.9 All electric heating cables in addition to color differences in section 7.5 should be on the coat of alphanumeric markings showing the logo of the manufacturer (brand) and the inscription, which shows the length of the heating section in meters, and its rated wattage. 7.10 on the final sections of electric heating alphanumeric labeling also permitted to indicate on the surface of the couplings. 7.11 On the helix electric heating cables with armor made of galvanized steel wires with no insulation and outer shell, the requirement of color and alphanumeric label does not apply. For these cable marking is applied only on the surface of the couplings or attached to the cable tag. 8 Exposure to the installations of the distributed electric heating 8.1 The installation of the distributed electric heating, depending on its use (floor heating in residential and public buildings in the premises for cattle, heating of the ground in greenhouses, and greenhouses, heated outdoor facilities and areas, heating the roof, gutters pipes and gutters, sidewalks and outdoor heating step, heating pipes) and the form used by electric heating sections (cable, film, plate) should be included in addition to electric heating sections (one or more) temperature sensor with mounting cord and temperature controller (thermostat). Upon request, the supplied may include mounting tape, corrugated tube for a temperature sensor, an additional temperature sensor object, humidity sensor, an automatic control mode of heating, Inadequate protection devices on the emergency operation, switching devices and protection against electric shock, connecting cables, insulation, heat-reflective screens, waterproofing. 8.2 Number of electric heating sections in the installation of the distributed electric heating and power ratings are dependent mainly on the area of ??the premises in which the installation will be applied (see 7.5, 7.6), as well as the design of the outdoor heated surfaces. 8.3 Power plants distributed electric heating from the power supply should be via the current device and the circuit breaker. In justified cases, such as using protective equalizing electrical potentials with the parameters that provide safe voltages of touch and step voltage, and in several other cases of the use of VDT and ASDC can not refuse. VDT and ASDC are mandatory for distributed electric heating installations in wet areas where a person can be without shoes on a wet floor, for example in the shower, as well as where it is not possible mechanical damage to the floor, such as animal houses. 8.4 The temperature sensor in conjunction with the thermostat must be able to maintain thermal conditions on the floor (10 ± 1) ° C to (35 ± 1) ° C. It should be placed in special plastic corrugated tube 12-16 mm in diameter, set in a concrete screed floor and using a special cable supplied with the sensor is connected to a temperature controller. In cases where the sensor is not a thermistor, and is designed as a fluid-filled bulb, it must connect to the thermostat with a metal capillary tube. Sensors designed for outdoor installations, must withstand low temperatures and is not damaged at minus 50 ° C. The temperature range in outdoor settings is different from the above and must be agreed in each case with the supplier depending on the purpose of installing a distributed electric heating. General specifications GOST 2.702-75 Unified system for design documentation. Rules for making electronic circuits with GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams. Robot device GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Device switching and contact connections GOST 2.756-76 * Unified system for design documentation. Graphical symbols in diagrams. Is often perceived electromechanical devices GOST 2.757-81 * Unified system for design documentation. Graphical symbols in diagrams. Elements of the switching field for switching systems GOST 2.758-81 Unified system for design documentation. Graphical symbols in diagrams. Signal Technology GOST 2.762-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and frequency bands for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Device with a pulse-code modulation GOST 2.764-86 Unified system for design documentation. Graphical symbols in electrical circuits. Integrated optoelectronic display elements GOST 2.768-90 Unified system for design documentation. Graphical symbols in diagrams.
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