Approximate analytical solution and numerical calculations of the ignition
of a condensed material (CM) by a wire heated by direct electric current ar
e used to study the effect of electrophysical characteristics and geometric
al dimensions of the conductor and the thermokinetic properties of the soli
d fuel on the ignition delay. The results obtained are in satisfactory agre
ement with experimental data. Results of parametrical analysis are generali
zed by an interpolation formula.