Models of horizontal electric cables and cable trays exposed to a fire plume

✍ Scribed by L.W. Hunter

• Publisher: Elsevier Science
• Year: 1979
• Tongue: English
• Weight: 598 KB
• Volume: 35
• Category: Article
• ISSN: 0010-2180
• DOI: 10.1016/0010-2180(79)90036-1

✦ Synopsis

Models are developed to describe horizontal insulated cables and cable trays exposed to a fire plume. The models also apply to cables protected by fire-retardant coatings. A cable or coated cable can ignite when its surface is hot enough to generate flammable gas, unless the level of 0 2 available is insufficient for ignition. Then the gas can often accumulate elsewhere and burn later. A first set of models predicts the delay time to the onset of gasification. Other models estimate the attainable mass flux of flammable gas generated by a tray of cables when the cables do not ignite directly. Longitudinal heat flow is identified as a factor tending to prevent direct ignition of single-conductor cables in the cool plumes encountered over cable-tray fires.