This report documents the second phase of a multi-year program called CHRISTIFIRE (Cable Heat Release, Ignition, and Spread in Tray Installations during Fire). The overall goal of the program is to quantify the burning characteristics of grouped electrical cables. This phase of the program involved bench-scale and large-scale experiments. Bench-scale experiments were performed using a cone calorimeter in which 10 cm (4 in) by 10 cm (4 in) cable segments were exposed to a relatively high heat flux to determine their burning rate, heat of combustion, and other properties. The large scale experiments consisted of loaded cable trays situated in vertical and horizontal configurations. For the vertical experiments, two cable trays were positioned either in the open air, or in a vertical channel that was open at the top and bottom. For the horizontal experiments, from one to four loaded cable trays were positioned horizontally with a 30 cm (1 ft) separation from the ceiling and tray to tray. The purpose of both sets of full-scale experiments was to determine the heat release and spread rates of burning cables in a variety of realistic configurations.
Citation: NUREG/CR-7010, Vol. 2
Pub Type: Others
Electrical cables, Fire experiments