GOST 50571.8-94 (IEC 364-4-47-81) UDC 696.6:006.354 Group E08 STATE STANDARD OF THE RUSSIAN FEDERATION Electrical installations of buildings Part 4: Protection for safety. General requirements for the application of protective measures to ensure safety. Requirements for the application of measures of protection against electric shock, Electrical installations of buildings. Part 4. Protection for safety. Application of protective measures for safety. Measures of protection against electric shock OKS 3402 Effective date 1/7/1995 Preface 1 prepared and submitted to the Technical Committee for Standardization TC 337 Electrical equipment of residential and public buildings "2 approved and put into effect by Decision of State Standard of Russia from 29.11.94 N 295 3 This standard contains full authentic text of the international standard IEC 364-4-47 (1981) "Electrical installations of buildings. Part 4. Requirements for security. Chapter 47. Application of protective measures to ensure safety. Section 470. General. Section 471. Measures of protection against electric shock "4 first introduced Introduction This standard is part of the state standards for electrical installations of buildings developed on the basis of the standards of the International Electrotechnical Commission IEC 364" Electrical installations of buildings. " On the contents of a standard set of requirements is a fundamental part of the application of general protective measures for security and protection against electric shock, the provisions which should be guided in all areas falling within the scope of the standardization and certification of electrical installations of buildings, the drafting and revision of standards, norms and rules on the device, testing and commissioning of electrical installations. Numbering sections and paragraphs in the standard are in conformity with IEC 364 standards for electrical installations of buildings. The numbering system established in the standards IEC 364, provides an indication of numbers of parts and chapters of the international standard notation for numbers of sections and paragraphs of private standards. For example, in the notation of paragraph 471.1 of the standard figure 4 represents the part number, 47 - the chapter number, 471 number of the section of the international standard IEC 364-4-47. The use of this numbering system provides vzaimouvyazku requirements of private standards set standards for the rules adopted by the IEC Technical Committee 64 "Electrical installations of buildings." The requirements of this standard is fully consistent with the requirements of the current "Regulations for Electrical (RB, Sixth Edition), approved Glavtehupravleniem and Gosenergonadzor USSR Ministry of Energy. This standard takes into account change in N 1 (1993), IEC 364-4-47, concerning the application of circuit breaker responsive to the differential current. 1. Scope This standard establishes general requirements for the application of protective measures to ensure the safety and requirements for application of protective measures against electric shock during operation of electrical equipment of buildings. Scope of Standard - GOST R 50571.1. 2. Statutory references in this standard references to the following standards: GOST 50571.1-93 Electrical installations of buildings. Key provisions of GOST 50571.3-94 Electrical installations of buildings. Part 4. Security requirements. Protection against electric shock, 470. General requirements for the application of protective measures to ensure the safety of 470.1. Protective measures should be applied to each electrical installation or part thereof, or to a separate electrical equipment, part of the installation. 470.2. Selection and application of protective measures made with regard to conditions of external influences. 470.3. Protection of electrical installations should be carried out: a) the protection of electrical equipment, part of the electrical and b) using protective measures during the installation (installation) of electrical equipment, and c) combining measures of protection from a) and b). 470.4. To ensure safety on electrical installation or part thereof should not be used mutually exclusive measures of protection. 471. Requirements for the application of protective measures against electric shock 471.1. Protection against direct contact with live parts (protection against direct contact) must be in accordance with the requirements of Section 411 and 412 GOST 50571.3. 471.2. Protection against indirect contact (protection for damage to the insulation). 471.2.1. Protection against indirect contact with the exposed conductive and conductive parts of the party if damaged insulation should be carried out by one or more of the protections set forth in Section 411 and 413 GOST R 50571.3 and 471.2.1.1-471.2.1.3 this standard. 471.2.1.1. Auto power off as a measure of protection in accordance with GOST 50571.3 413.1 should apply to any electrical installation, except those parts which used another measure of protection. 471.2.1.2. If you use auto power-off is impossible or undesirable for any reason, then some parts of electrical protection can be applied by placing electrical equipment in a non-conductive areas in accordance with GOST 50571.3 413.3 or protection by the local bonding system, not related to the land in According to GOST R 50571.3 413.4. 471.2.1.3. Use the following protective measures: a) protection through systems BSNN ZSNN and in accordance with GOST 50571.3 411.1 b) the application of electrical protection class II or equivalent insulation in accordance with GOST 50571.3 413.2 c) the electrical division circuit in accordance with GOST 413.5 P 50571.3, which can be applied to the entire electrical installation in general, but usually for some parts of electrical or some equipment. 471.2.2. Measure of protection against electric shock, indirect contact can not be applied to exposed conductive and conductive parts of the party in the following cases: a) if the brackets for suspension insulators and metal parts connected with them, arranged so that, before they can reach out a hand, b ) if part of the metal reinforcement of reinforced concrete structures are not accessible to the touch, and c) if the exposed conductive parts that are due to small size (no more than 50x50 mm) or their location is not accessible to the touch, and their connection to the protective earth conductor is difficult or unreliable For example, screws, rivets, plates, clamps and cables, etc. d) If the metal tubes or shells, protecting the electrical equipment comply with the requirements of GOST R 50571.3 413.2. 471.2.3. If, as a measure of protection is applied to power off, then plug the connector to protect outdoor installation with rated current less than 20 A intended for connection of mobile equipment outdoor, should be used circuit breaker responsive to the differential current, the setpoint response is not more than 30 mA. Notes: 1. If necessary, connect to the electrical installation of mobile equipment outdoor installation it is recommended that intended to connect one or more plug connectors are suitable for use in outdoor conditions. 2. During operation of electric, plug connectors with a rated current up to 20A, unskilled and untrained personnel is recommended as an additional measure of protection according to GOST R 50571.3 412.5 apply circuit breaker responsive to the differential current, the setpoint response is not more than 30 mA. Key words: electrical buildings security, application protection, protection against electric shock Published 06/26/2008 State 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. 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. 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