When exposed to flame, available heat is used to volatilize the water of hydration, thus cooling the flame and slowing decomposition. The water vapors will block the oxygen supply from the fuel, and the fire may be extinguished or its progress may be retarded. Products developed to date using zero halogen polyolefin based insulating materials are NM-B cable, THHN, and THWN conductors. Power and Control Tray Cable is under development. Product is oil, gasoline, and abrasion resistant.
Product is oil, gasoline, and abrasion resistant.
The cone calorimeter tests were conducted in accordance with ASTM E1354. The data obtained included heat release, smoke obscuration, corrosion, and total weight loss. The UL 1581 vertical tray flame test was conducted on both the PVC and zero halogen constructions. Data obtained included flame height vs. time, total smoke release, and peak smoke release. The University of Pittsburgh toxicity test was used for evaluation of toxicity of thermal decomposition of completely constructed cables.