Study of Combustion Characteristics of Cables inside a Common Duct by Cone Calorimeter Test

The spacial characteristics of an underground common duct often lead to disasters resulting in great damage life and property. In the case a cable fire, additional damages such as failure power fire prevention equipment occur. Accordingly, derive risk factors cone calorimeter test was performed this study. simulation factor obtained by measuring temperature changes with time, while heat release rate (which depends on type) determined combustion subject. measurements were conducted mainly for incombustible general communication cables used duct. According test, cable, ignition time measured be 26 s maximum 187 kW/m<sup>2</sup> 190 s. For flame resisting 20 179 40 154 100 results will response originating from