Some Aspects of Regulating Cables Fire Resistance and Maintaining Functionality of Electric Wiring

G.I. Smelkov, Dr. Sci. (Eng.), Prof., Chief Research Associate, A.I. Ryabikov, Department Head E.V. Kuznetsova, Senior Researcher FGBU VNIIPO EMERCOM of Russia, Balashikha, Russia


On the basis of statistic data analysis, it is established that electric wiring — the most fire-hazardous among electrical equipment. According to the requirements of the Federal law of July 22, 2008 № 123-FL «Technical regulations on fire safety requirements», highly important index of electric wiring fire safety for objects fire protection systems — maintaining working capacity (fire resistance) under the conditions of fire during the time period required for implementation of functions of these systems and evacuation of people to a safe zone. In this regard the results of electric wiring tests on fire resistance executed in FGBU VNIIPO EMERCOM of Russia were summed up, some terminological aspects characterizing resistance of electric wiring to maintaining their functionality in case of thermal effect are considered.
Proposals on updating and making actual of GOST R 53316—2009 taking into account the received comments, revealed shortcomings and also existing requirements of Rosstandart related to the international harmonization of the normative documents were stated. Main changes were considered which are provided in the new edition of this normative document under the name «Electric wiring. Maintaining working capacity (fire resistance) under the conditions of the standard thermal effect. Test methods». Need in introduction of the number of changes and clarifications concerning the description of the test bench (furnace), conditions of placement and fixing of the tested samples in the combustion chamber, regulation of the requirements to the metering equipment, protective and alarm equipment, updating and replacement of types of cable products design at fire-resistant electrical conduit is analyzed in the article. Introduction of the section for classification of electric wiring on fire resistance limits will also become an important addition.


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DOI: 10.24000/0409-2961-2017-10-46-50
Year: 2017
Issue num: October
Keywords : fire safety electric wiring maintaining working capacity fire resistance test method standard update making actual