Fire ignition of NYM cable shield vapor on excessive electric current in multi core cables

Abstract

People oftenky use electrical appliances exceeds the technical specifications, but if done technically prevention of the manufacture of the cable to prevent the occurrence of fire, the fire risk will be minimized. Under the rules of SNI, heated wires or fed by the overcurrent, to be able to not burn. However, in some ocassions, electrical wires burned and turned into a heat source for fires. NYM cable flame characteristics in the event of overload currents, laminar diffusion flame occurs, the process of liquefaction, pyrolysis, diffusion, and combustion clearly seen. NYM cable flame propagation patterns in the incidence of overload start happening at that point reaches ignition temperature, which occurs due to an electric wire heat reaching the melting temperature of copper. Flame propagates in all directions where their fume and oxygen along the cable and around the cable. In certain circumstances, occur splash / explosion of the fuel to evaporate.