Explosion-proof assembly having at least one bushing part that comprises multiple bushing openings with one bushing surface in each case, and that is integral part of a wall or that is attached in the wall as separate component in a flameproof manner by means of a threaded connection and/or a substance bond connection, having at least one connecting body, which has at least one conductor channel extending through the connecting body in a longitudinal direction, having at least one conductor device, which extends with a mounting portion through the at least one conductor channel and has at least one electrical and/or optical conductor, wherein the at least one connecting body is connected in a flameproof manner in the mounting portion to the respective assigned conductor device, wherein each connecting body has a first delimiting surface on its outer side facing away from the conductor device, the first delimiting surface forming a flameproof Ex-gap together with a second delimiting surface, which is formed by the bushing surface of the bushing opening, wherein the first delimiting surface and the second delimiting surface are free of threads respectively, wherein the at least one connecting body is inserted into one of the bushing openings, wherein at least one securing device is provided, which is configured to establish an unthreaded, releasable and non-substance bonded connection between the at least one connecting body and the bushing part so that a relative movement between the at least one connecting body and the bushing part in the longitudinal direction is limited or prevented, and wherein each bushing opening of the bushing part is made flameproof either by arrangement of a connecting body or by insertion of a closure means. having at least one bushing part that comprises multiple bushing openings with one bushing surface in each case, and that is integral part of a wall or that is attached in the wall as separate component in a flameproof manner by means of a threaded connection and/or a substance bond connection, having at least one connecting body, which has at least one conductor channel extending through the connecting body in a longitudinal direction, having at least one conductor device, which extends with a mounting portion through the at least one conductor channel and has at least one electrical and/or optical conductor, wherein the at least one connecting body is connected in a flameproof manner in the mounting portion to the respective assigned conductor device, wherein each connecting body has a first delimiting surface on its outer side facing away from the conductor device, the first delimiting surface forming a flameproof Ex-gap together with a second delimiting surface, which is formed by the bushing surface of the bushing opening, wherein the first delimiting surface and the second delimiting surface are free of threads respectively, wherein the at least one connecting body is inserted into one of the bushing openings, wherein at least one securing device is provided, which is configured to establish an unthreaded, releasable and non-substance bonded connection between the at least one connecting body and the bushing part so that a relative movement between the at least one connecting body and the bushing part in the longitudinal direction is limited or prevented, and wherein each bushing opening of the bushing part is made flameproof either by arrangement of a connecting body or by insertion of a closure means.