company news about The necessity of EN 50399:2011 standard wire and cable heat release combustion test

GB/T 31248-2014 is the core testing standard for the combustion safety of wires and cables. Its heat release combustion test is a necessary means to quantitatively evaluate the fire hazard of cables, support grading and engineering selection, and ensure the safety of personnel and facilities.

1、 Standard core positioning
GB/T 31248-2014 "Test Methods for Flame Spread, Heat Release, and Smoke Production Characteristics of Cables or Optical Cables under Fire Conditions" is a supporting test method for GB 31247-2014 "Classification of Combustion Performance of Cables and Optical Cables", used to scientifically evaluate the A/B1/B2/B3 level combustion performance of cables.

2、 The necessity of heat release combustion testing
1. Scientific quantification of fire hazard (core value)
Heat Release Rate (HRR): The amount of heat released per unit time directly determines the rate of fire growth and the temperature of the fire scene, and is a key indicator for determining whether a fire will quickly spiral out of control.
Total Heat Release (THR): The total amount of heat generated determines the duration and intensity of a fire.
FIGRA (Burning Growth Rate Index): reflects the speed of fire development, with higher values indicating greater danger.
Flame Spread (FS): Carbonization height/distance, evaluating the vertical/horizontal diffusion ability of flames along cable bundles.
Smoke production and toxicity: Smoke density, smoke production rate, and smoke toxicity directly affect personnel evacuation and rescue visibility.
Droplet: Does the molten droplet ignite the combustible material below, causing a secondary fire. translation.