Electric Cables Installed in OSB Boards Surfaces and Their Temperature
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This paper discusses the impact of low-level electrical current on the temperature of electrical cables installed in surface grooves of oriented strand board (OSB). The three-wire power electrical cable (copper conductors each with a cross-section of 1.50 mm2) with fire reaction class B2ca and construction OSB intended for use in dry or humid environments were investigated. The electrical cable was powered by an alternating current (AC) power supply (230 V) and connected to incandescent light bulbs with a total power input of 200, 400 and 600 W (this power input corresponded to an electric currents of 0.87, 1.74 and 2.61 A). Incandescent light bulbs were connected in parallel to the cable. During the test, thermocouples were used to measure temperatures on the surface of the electrical cable, on the surface of the OSB at a distance of 2 cm from the centre of the cable and the ambient temperature. The data obtained show that as the electrical current increases, the temperature of the cable installed in the OSB surface grooves increases. The maximum cable temperature (30.1 °C) was recorded at an incandescent light bulb of 600 W. The recorded temperature (30.1 °C) is lower than the core temperature limit of the investigated cable under normal operation (90 °C).
KeywordsOriented Strand Board (OSB) Electrical cable Electrical current Temperature Temperature limit
This work was supported by the Slovak Research and Development Agency under the contract No. APVV-16-0223. This work was also supported by the KEGA under the contract No. 030UMB-4/2017.
- 1.ČSN 33 2000-5-52:2012 (2012) Low-Voltage Electrical Installations. Part 5-52: Selection and Erection of Electrical Equipment – Wiring Systems. Czech Office for Standards, Metrology and testing, PragueGoogle Scholar
- 5.EN 300:2006: Oriented Strand Boards (OSB): Definitions, Classification and Specifications. European Committee for Standardization, Brussels (2006)Google Scholar
- 7.Zachar M (2010) Selected deciduous wood species flash ignition and ignition temperature determination. In: Mrackova E, Markova I (eds) Proceedings of the 3rd international scientific conference fire engineering. Technical University in Zvolen, Zvolen, pp 431–438Google Scholar
- 8.Markova I, Hroncova E, Tomaskin J, Turekova I (2018) Thermal analysis of granulometry selected wood dust particles. BioResources 13:8041–8060Google Scholar
- 10.Reinprecht L, Vidholdova Z (2008) Thermowood: its preparation, properties and application. Technical University in Zvolen, ZvolenGoogle Scholar