Abstract: The flame-proof electric device includes a flame-proof partition separating a flame-proof lead-in chamber for the current conductors and power supply cable and a flame-proof component chamber. The flame-proof partition has mounted thereon an interlocking disconnecting switch, a flame-proof casing and at least one first, at least one second and at least one third lead-through current-conducting terminals. The first lead-through current-conducting terminal is connected with the power supply cable and the interlocking disconnecting switch which is also connected through a serial connection of the third and second lead-through current-conducting terminals with the components of the electric circuitry within the flame-proof component chamber.