Abstract

It is important to investigate the flammability of circuit subjected to arc discharge in terms of fire safety. In this research, the flammability of electric wire was investigated as a most simplified circuit. Furthermore, stable arc discharge is assumed by using TIG arc welding machine. The electric wire subjected to arc discharge is ignited in any arc energy, however, the probability that the electric wire burns independently after arc discharge varies with arc energy. Finally, the result was summarized by introducing a dimensionless number that shows the energy balance between arc energy and latent heat energy of insulator of electric wire.

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