Fire resistance test for wires and cables IEC60332-1/BS4066-1 flame retardant grade This is the flame retardant standard for a single cable. According to the test regulations, a 60cm long sample is vertically fixed in a metal box opened on the front wall. A propane burner with a flame length of 175mm contacts the cable at a 45 degree angle from a position 450mm from the upper fixed end of the sample. If the damaged part of the sample is not more than 50mm from the lower fixed end, the test is passed. IEC60332-3/BS4066-3 flame retardant grade This is the flame retardant standard for bundled cables. Test regulations, bundle 3 A 5m long cable sample is fixed on a trapezoidal test stand with iron wire, and the number of samples is determined by the non-metallic materials required for different classifications. The sample is vertically hung on the back wall of the combustion furnace, and air is introduced into the combustion furnace through the air inlet on the bottom plate. The propane flat burner is in contact with the sample with a flame at 750 ℃, and the sample is subjected to forced blowing (airflow discharge of 5m3/minute, wind speed of 0 Under the condition of 9m/s, it must not ignite within 20 minutes of vertical combustion, and the cable must spread 2 Self extinguishing within 5 meters. IEC60332 is divided into Class A, Class B, Class C, and Class D to evaluate the flame retardant performance. Part of the testing standards GB/T 14983-2008 Refractory materials - Alkaline resistance test method GB/T 16555-2008- Carbon, silicon carbide Chemical analysis methods for nitride refractory materials GB/T 17617-1998 Sampling of refractory raw materials and amorphous refractory materials GB/T 17911-2006 Test methods for ceramic fiber products of refractory materials GB/T 18301-2012 Test methods for room temperature wear resistance of refractory materials GB/T 21114-2007 X-ray fluorescence spectrochemical analysis of refractory materials - Fused cast glass method GB/T 22588-2008 Flash method for measuring thermal diffusion coefficient or thermal conductivity GB/T 23293-2009 Nitride bonded refractory products GB/T 23294-2009 Wear resistant and refractory materials and their supporting refractory slurries GB/T 18301-2012 Test method for room temperature wear resistance of refractory materials
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