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Effective flame retardant flame retardant cable length is? Jan 12, 2017

In accordance with the requirements of national standard GB12666.5-90 consists of (a, b, c) at three levels.

Each sample line intercept 3.5 metres, using a blowtorch flame (815 c) burn-like line for 40 minutes (a, b) \\\\20 minutes (c), the cable carbide surface not more than 2.5 metres in height, self-extinguishing time less than or equal to 60 minutes, according to GB\\\\T18380.3-2001 's request, flame retardants levels divided into A\\\\B\\\\C\\\\D four grades.