GOST 50669-94 UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electricity and electrical mobile (inventory) of buildings made of metal or a metal frame for street trading and public service Specifications Mobile (inventory) buildings of metal or with metal frame power suply and electrical safety for street trade and household services. Technical requirements OKS 3402 Effective date for new construction 01.01.1995 for conversion of buildings constructed before 01/01/1996 a developed and submitted by the Technical Committee for Standardization TC 337 Electrical equipment of residential and public buildings "2 approved and put into effect by Decision of Russian State Standard from 24.05.94 N 156 3 PUT FIRST amended, published in IUSe N in April 1996 INTRODUCTION This standard builds on GOST 23274, which for a large class of mobile (inventory) of buildings set common technical requirements for electrical installations, including requirements for electricity and electrical safety. However, these requirements were inadequate in relation to mobile buildings made of metal or having metal frame and designed for street trading and consumer services (retail pavilions, kiosks, tents, cafes, booths, vans, boxed garages, etc.). These buildings have recently mass distribution in urban and rural areas. Operational experience has shown that intensive interaction with people leads to severe elektrotravmatizmu predominantly due to the closures of the wiring on the metal buildings and insufficient use of modern zlektrozaschitnyh technical activities. This standard establishes new technical requirements for electricity and electrical mobile (inventory) of buildings made of metal or having metal frame designed for street trading and consumer services that meet international standards of IEC 364 for electrical installations of buildings and different from the requirements of paragraphs 1.2 and 1.6 GOST 23274, which do not apply to these buildings. This standard is applied provided IEC 364-3-93 Power Grid CT - grounded by the low voltage transformer voltage of 6-10/0, 4 kV, direct link exposed conductive parts of electrical equipment of buildings (the consumer) to the ground and neutral conductor. Permitted to use an electric network TN-S system with grounded neutral and the vanishing of exposed conductive parts, with separate zero workers and protective earth conductor. As an additional elektrozaschitnogo technical measures used by circuit breaker. The advantage of the electrical network of TT is that the exposed conductive parts (metal body and frame of mobile buildings), electrical potential under normal operating conditions (in the absence of closure on the case) is always zero. The presence of residual current device provides, first, reliable off-fault case and, secondly, reduces the likelihood elektroporazheniya people who accidentally touches the live parts. Standard is for new construction above the buildings from January 1, 1995 and for the conversion of previously constructed buildings - from January 1, 1996 1 Scope This Standard specifies requirements for electricity and electrical mobile (inventory) of buildings made of metal or having metal framework, intended for street trading and consumer services (retail pavilions, kiosks, tents, cafes, booths, vans, boxed garages, etc.). Standard should be applied in conjunction with GOST 23274. 2 Normative references in this standard references to the following standards: GOST 13109-87 Electrical energy. Requirements for the quality of electrical energy in electric networks of general purpose GOST 19734-80 Cable-distributive devices - for residential and public buildings. General specifications GOST 23274-84 Buildings Mobile (inventory). Installation. General specifications GOST 50571.1-93 Electrical installations of buildings. Basic principles. 3 Definitions In this standard, the following terms. 3.1 Elektrotravmatizm a phenomenon characterized by a set of electric shock. 3.2 The closure on the body - an electrical connection with the live parts exposed conductive parts. 3.3 exposed conductive parts - netokoveduschie of available human touch between them or between them and land in violation of insulation of live parts may occur with respect to ground voltage exceeds the maximum permissible value for human touch voltage. Thus under netokoveduschey part of the electrical conductive means which are not in the course of its work under the operating voltage. 3.4-electrically live parts of electrical installations, which is in the process of its work under the operating voltage. 3.5 water-distribution system - a set of structures, machines and devices, placed on the input supply line to the building or its separate part, as well as on the outgoing lines from it. 3.6 The opening device - a lockable flap that is fastened on the outer wall of the building and intended to enter the outdoor wiring or cables, their subsequent entry into the building and transit output going to the next building. 3.7 Input (from overhead power line) - wiring that connects an offshoot of the overhead power line with internal wiring, starting from the insulators mounted on the outer surface (wall, roof) building, to clamp input device. 3.8 touch voltage - the voltage that appears on your body while you touch the two points of the conductors or conductive parts contained in the circuit, including the damage to the insulation. 3.9 Setting of leakage current - nominal value of leakage current at which the device is triggered breaker. 10.3 Leakage current of the mains with earthed neutral - current flowing through the section of the circuit which is connected in parallel with the neutral conductor, and in the absence of neutral conductor - residual current. 3.11 CT Network - mains supply, which has a point directly related to the land, and exposed conductive parts are connected to electrical earth electrode is electrically independent of the neutral earthing the power source. 3.12 Network TN - mains supply, which has a point directly related to the land, and exposed conductive parts of electrical joining this point through the protective earth conductor. 3.13 The network TN-S - network TN, in which zero work and zero protective conductors working separately across the network. 4 TECHNICAL REQUIREMENTS 4.1 General requirements - according to GOST R 50571.1 and GOST 23274. 4.2 Requirements for Electricity 4.2.1 Electricity buildings should be carried out from the mains voltage of 380/220 V with a grounded neutral. Diagram of power supply - Power Grid CT. Allowed to use electricity network TN-S system with grounded neutral, and vanishing with separate zero workers and protective earth conductor. 4.2.2 Deviation voltage power consumers of the buildings from the nominal - in accordance with GOST 13109. 4.2.3 Outside the wiring harness to separate buildings should be carried out: - Network TT - Two-wire single-phase or three-phase four - for the network TN-S - single-phase three-wire or three-phase pyatiprovodnoy. When electricity transit three or more (up to twelve) are located next to the buildings exterior wiring is recommended to perform three-phase four (to - the network of TT) or pyatiprovodnoy (for the network TN-S). 4.2.4 Single-phase loads are located next to buildings that receive electricity transit from the same external wiring should be distributed evenly over the phases. The difference in the currents of the most and the least-loaded phases in place of connection to the mains electricity supply must not exceed 15%. 4.2.5 Outside the wiring that goes to the building, should be attached to the mains supply in the near located residential and other buildings (in water-distribution facilities, main, secondary group, floor distribution boxes and residential shields) or on the anvil overhead line power (VL). 4.2.6 At the point of joining the outside wiring to the mains electricity supply to 4.2.5 should be installed devices protect against short-circuit current eamykaniya. 4.2.7 Entering into a separate building should be carried out through the roof in a metal tube with double insulation. In this case, if the input is performed by an offshoot of the IL, then on the roof should be installed with a traverse of insulators. When electricity transit of two or more buildings on their walls must be installed input devices. The design of input devices - according to GOST 19734. When connecting via the input device of wires or cables and transit deriving from it the cable to the device must be installed two metal pipes with double insulation. In this case, the vertical distance from the branch wires or cables to the input and from the wires or cable input and output of transit to the roof must be not less than 0,5 m and the distance from the wire or cable to the ground - not less than 2,75 m. For prevent the ingress of water through metal pipes in the building and opening the device pipe should be protected from leaking in the water. To this end, we recommend the pipe to bend toward the ground and carry gland seals of insulating material. Entries into the building from the input devices must be made through the wall conduit. 4.2.8 To connect the transit load clamps input devices should be strengthened on the basis of a ten-fold the rated current of a single building. 4.2.9 water-distribution systems of buildings should include the control and protection devices, including the RCD to the set point for leakage current below 30 mA, and have a meter of active energy. Type of water-distribution device should be defined in the draft or working documents on the electrical installation of the building, duly approved, depending on the type and purpose of the building. 02/04/1910 induction and switchgear should be installed inside the building at the entrance. Aisle width service in the light before induction and switchgear buildings must be at least 0.8 m (and not less than 0,6 m in front of an open cabinet door), the height of the passage - not less than 1,9 m GOST 23274. 02/04/1911 The buildings should be set at least two outlets: 6 and 10A, both with a contact for the protective conductor (the latest for electrical power up to 2,2 kW). This contact must be electrically connected to metal housing or frame of the building. 02/04/1912 Connecting buildings to the mains electricity supply must be carried out in accordance with technical requirements of power supply organization. Note - The list of technical specifications for electrical connection of the building (or buildings) to the supply mains is given in Appendix A. 4.3 4.3.1 Electrical safety Electrical safety of people as outside, and inside should be provided elektrozaschitnyh complex technical activities, including the use of RCD as a place of connection to external electrical supply network, and inside the building, re-grounding neutral conductor - for a network of TT (protective earth conductor - for a network TN-S) in place of connection to external electrical supply mains, ground - for a network of TT (neutral - network TN-S) of the metal shell or frame of the building, double-insulated bushings. 4.3.2 RCD should be installed in accordance with 4.2.9. 4.3.3 Re-earthing neutral main conductor for the network CT (protective earth conductor - for a network TN-S) in order to exclude atmospheric overvoltages that can cause failure of the RCD and cause breakdown of insulation of wires should be performed in place of connection to external wiring mains electricity supply to the RCD. In the first place should be used nearby natural or man-grounding, and in their absence must be provided artificial earthing. Resistance to re-ground zero of the working or protective conductor must not exceed 30 0m. When the resistivity r of the earth more than 100 ohms * m is allowed to increase this rate to 0,01 r times, but not more than tenfold. Allowed not to comply with repeated ground zero working or protective conductor in place of connection outside of the wiring to the mains, if the network is carried laid in the ground cable or an air line of less than 200 m, as well as having at least one re-grounding of overhead line with a length of more than 200 m. 4.3.4 Grounding the metal case or frame of the building should be done by constructing near each building grounding device, whose resistance R, 0m in the worst season should not exceed: touch voltage values ??equal to 12 divided by 1.4, multiplied by on the IV set-point of UST leakage current in amperes. R = 12 / (1.4 IV), where 12 - the value of touch voltage, V. 4.3.5 Inside the building all the exposed conductive parts of fixed equipment shall be connected: - Network CT - grounding conductors to grounding device referred to in 4.3. 4 - for the network TN-S - protecting the neutral conductor with vanishing metal housing or frame of the building. In this case, the smallest size of grounding or protective neutral conductor shall be installed in accordance with Table 1.7.1 of "Rules for Electrical, approved Glavtehupravleniem and Gosenergonadzor USSR Ministry of Energy. As a protective earthing or neutral conductor may also be used in metal building construction. 4.3.6 The need for lightning protection of buildings in accordance with GOST 23274 shall be determined in planning permission, depending on the type of building and location on the map of the average duration of thunderstorms and in accordance with "Instructions for lightning protection of buildings and structures", approved by the USSR Ministry of Energy 30 July 1987 4.4 Requirements for electrical installation regulations - on 1.5.1-1.5.7 GOST 23274. 4.5 Requirements for in-service inspection 4.5.1 Operational control of electrical installations and means to ensure electrical safety should be carried out jointly with the authorities Gosenergonadzor responsible for the electrical equipment and include the acceptance tests and periodic monitoring. 4.5.2 Acceptance testing should be carried out before entering the building in operation (initial and after the relocation), and after repair and is to check the availability of technical documentation, technical inspection and testing in accordance with the requirements of this standard, "Regulations for Electrical, approved Glavtehupravleniem and Gosenergonadzor USSR Ministry of Energy and the Rules of operation of electrical consumers, "approved Glavgosenergonadzorom. The scope of acceptance tests should include checking the maximum response of independent releases and thermal circuit breakers designed to protect against short circuit and overload protection, regardless of the current ratings of circuit breakers. Verification of electrical installations of buildings for compliance with fire safety requirements should be conducted before entering the building into operation in accordance with the "Model Regulations on fire safety for residential buildings, hotels, hostels, houses administrative offices and individual garages, approved by the Ministry of Internal Affairs of the USSR, the 4.5.3 11/20/1978 periodic monitoring should be carried out during the operation of the building responsible for the electrical equipment and be to conduct periodic inspections and testing of electrical installations and means of ensuring electrical safety in accordance with the requirements of this standard, "Rules of operation of electrical consumers," and "Rules of safety in the operation of electrical consumers," approved Glavgosenergonadzorom . 4.5.4 Each building must be a document (certificate or an act-tolerance) of compliance systems, electricity and electrical safety requirements of this standard, issued in the manner prescribed Glavgosenergonadearom. The document should also be pointed out that the grounding device of each building and re-earthed neutral main conductor for the network CT (protective earth conductor - for a network TN-S) on the input (in place of connection to the mains outside the wiring that goes to the buildings) compliant this standard. Verification of compliance re-grounding requirements of this standard must be met to any and all buildings at least once a year. 4.5.5 The person responsible for the electrical equipment of the building, should regularly check the efficiency of RCD by pressing "Control". For UST installed in the building, so the check should be carried out monthly. Annex A (normative) List of technical requirements for connection to the mains electricity supply electric mobile building (or buildings) of metal or a metal frame for street trading and public service A1 Background A1.1 authorized power, kW. A1.2 Installed power, kW. A1.3 Permit power supply organization to join N _______ of _______ A1.4 Category ensure reliability of power supply of the building. A1.5 Number of phase I (one or three). A1.6 The sequence of the transit system to connect power supply of buildings belonging to different legal entities (with two or more buildings located nearby). A2 must be developed and agreed with the authorities Gosenergonadzor project power building (or buildings). The project shall be: - setting in place of connection to external electrical supply power supply devices protect against short circuit and protective device (RCD) with a set point for leakage current to 30 mA - uniform distribution of single-phase loads are located near buildings (not more than twelve) receiving electricity transit from the same external wiring. The difference in the currents of most and least loaded phases in the introductory unit first to move the energy of the building should not exceed 15% - putting in a separate building across the roof in a metal tube with double insulation (if the input is performed by an offshoot of the IL, then on the roof of the building should establish traverse with insulators) - buildings with electricity transit installed on the walls of their input devices, which construction should comply with GOST 19734. Entries into the building from the input devices must be made through the wall conduit - the existence in each building water-distribution device that contains the control apparatus and protection, including the RCD to the set point for the leakage current does not exceed 10 mA, and the counter is active electricity - grounding metal body or frame of the building by constructing near each building grounding device, whose resistance to the worst season should not exceed 300 0m - Network CT (or neutral - to the network TN-S). - Grounding inside buildings of all exposed conductive parts of fixed electrical equipment. At the same time as the grounding conductors may also be used in metal structures for buildings - ground zero re-working of the conductor for the network of TT (or no protective conductor - for a network TN-S in place of connection to external electrical supply mains (to RCD) with an impedance of more than 30 0m (with resistivity r of the earth more than 100 ohms * m is allowed to increase this rate to 0,01 r times, but not more than ten-fold). It must first be used in nearby natural or existing artificial grounding grounding. It is allowed perform re-ground zero of the working conductor, if supplied by the electrical network made laid in the ground or cable is overhead of less than 200 m and 200 m, but has at least one re-grounding of the neutral conductor; - the need for lightning protection of buildings depending on their type and location on the map the average duration of thunderstorms and in accordance with "Instructions for lightning protection of buildings and structures", approved by the USSR Ministry of Energy July 30, 1987 A3 and perform a measurement of resistance earthing of each building, re-working ground zero or zero protective conductor, the insulation resistance wires and cables of external and internal electrical wiring, circuit resistance "phase-zero" for the most remote consumer (insulation resistance and circuit "phase-zero" measured in the detached RCD) and checking the response of maximal independent releases and thermal circuit breakers. A4 object is to produce for inspection Inspector Gosenergonadzor by submitting the following documents: - Draft a utility power, consistent with Gosenergonadzor - the act of carrying on the division of ownership and operational responsibility between the owner (or owners) of a building (or buildings) and the energy supplying organization - the resolution of territorial authorities for the installation of the facility including its address and bind to the general plan - the energy supplying organization permission to join the electrical system of the object to the supply mains, indicating the allowed power - the disposal of (or agreement building owners) to appoint a person responsible for the electric - the protocols of measurement of insulation resistance of cables and wires outside and domestic electrical wiring and circuit resistance "phase-zero" - the protocol of measurement of resistance of grounding devices of each building and re-ground zero of the working conductor - the act of the hidden works on installation of grounding devices and wiring (which does not require the installation of internal wiring in the factory manufacture of building) - a document (certificate or an act-tolerance) and the contract for the use of electricity, issued in accordance with the procedure established Glavgosenergonadzorom. Note. Measuring and testing electrical systems of buildings should be carried out by the testing laboratories accredited to perform these tests. INTRODUCTION 1 Scope 2 Normative references 3 Definitions 4 SPECIFICATIONS Annex A (normative). The list of technical requirements for connection to the mains electricity supply electric mobile building (or buildings) of metal or a metal frame for street trading and public service Published 26/06/2008 Standards on the topic "Electrical, lighting, security systems," GOST 15597-82 Fixtures for industrial buildings. General specifications GOST 2.702-75 Unified system for design documentation. The rules of electrical circuits GOST 2.752-71 Unified system for design documentation. Graphical symbols in diagrams . Devices robot GOST 2.755-87 Unified system for design documentation. Graphical symbols in electrical circuits. Devices 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 * Single system 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. GOST 2.762-85 signal technology * Unified system for design documentation. Graphical symbols in electrical circuits. Frequencies and ranges of frequencies for transmission systems GOST 2.763-85 * Unified system for design documentation. Graphical symbols in electrical circuits. Devices with PCM 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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