阻燃电缆标准（Flame retardant cable standard）.docVIP

阻燃电缆标准（Flame retardant cable standard） Main technical indexes of flame retardant cable 1. finished cable conductor (R) DC resistance (GB3956 compliant) 2. 50HZ3.5KV/5min AC voltage test: no breakdown of IEC flame retardant in flame retardant performance evaluation of cable, the International Electrotechnical Commission were developed IEC60332-1, IEC60332-2 and IEC60332-3 three standard. IEC60332-1 and IEC60332-2 are used to evaluate the flame retardance of single cable under oblique and vertical distribution (domestic corresponding to GB12666.3 and GB12666.4 standards). IEC60332-3 (domestic corresponding to GB12666.5-90, GB12666.5 has been used to replace GB/T 18380.3-2001) evaluation of bundles of flame retardant cable vertical burning capacity, much higher requirements in flame retardant ability compared with bunched cable vertical burning. The IEC60332-1/BS4066-1 flame retardant (single wire or cable vertical burning test Flame Test On Single Vertical Insulated Wires/Cables) this is a single cable flame retardant standard. Test regulations, a 60cm long specimen is vertically fixed on the front wall of the opening of the metal box, propane burner flame length 175mm flame from the upper part of the fixed end 450mm from sample position on the cone and cable at a 45 degree angle contact, if the sample is close to the fixed end lower part combustion damage does not exceed 50mm, the test. Flame retardant cable The IEC60332-3/BS4066-3 flame retardant (bunched wires or cable vertical burning test Flame Test On BunchedWires/Cables) this is the standard flame retardant bunched cables. The test stipulates that the cable specimens with long bundles of 3.5m shall be fixed on the ladder test rack by wire, and the number of specimens shall be determined according to the non-metallic materials required by different classifications. The sample is hung vertically on the back wall of the combustion furnace, and the air is introduced into the combustion furnace through the air inlet