Analysis of determination of fire resistance limits of cable lines

Fire Resistant cables are designed to maintain the circuit integrity of the cable even during fire conditions. In general, the fire-resistant cables are made up of flame retardant zero halogen materials, so that the fire hazard such as flame propagation and smoke release of these cables are controlled. These material characteristics show us completely dangerous of such emissions influence on humans and animals. That’s why all fire-resistant halogen-free materials are subject to destructive testing in a combustion chamber with connected gas analyzer. This paper describes the analysis of determination of cable lines fire resistance limits according to the existing Ukrainian test standards. Fire-resistant halogen-free cables were tested in a fire furnace located individually and in bundles. The limit of fire resistance and the class of the cable product are determined according to the fire resistance classification and temperature mode.