A conveyor system, comprising - two frame profiles (2, 3) which run such that they are spaced apart from one another, - a plurality of motorized conveyor rollers arranged in between, - an insulator which runs along the at least one frame profile and - a plurality of electric conductors which are arranged in the insulator and are electrically connected to drive electronics of the conveyor rollers, wherein the form factor f of an electric conductor, which is defined as a quotient of the circumference of a circle which is equivalent in area to the cross section of the electric conductor and of the circumference of said cross section of the electric conductor, is in the range from f= 0.88 to f=1.00, and - a connection box which is disposed separately from the conveyor roller, characterized in that the insulator comprises a plurality of receptacles which are open on the longitudinal side and one electric conductor is mounted in each receptacle, wherein the insulator having the plurality of receptacles which are open on the longitudinal side and the electric conductors forms a power supply bus, and that different sections of the power supply bus are interconnected via a connecting cable, wherein the connecting cable is equipped with plugs (17, 18), which can be plugged into the connection boxes, and that for the electrical connection of multiple sections of electric conductors, the plugs (17, 18) comprise contacts extending around the electric conductors in a spring-loaded manner. - two frame profiles (2, 3) which run such that they are spaced apart from one another, - a plurality of motorized conveyor rollers arranged in between, - an insulator which runs along the at least one frame profile and - a plurality of electric conductors which are arranged in the insulator and are electrically connected to drive electronics of the conveyor rollers, wherein the form factor f of an electric conductor, which is defined as a quotient of the circumference of a circle which is equivalent in area to the cross section of the electric conductor and of the circumference of said cross section of the electric conductor, is in the range from f= 0.88 to f=1.00, and - a connection box which is disposed separately from the conveyor roller, characterized in that the insulator comprises a plurality of receptacles which are open on the longitudinal side and one electric conductor is mounted in each receptacle, wherein the insulator having the plurality of receptacles which are open on the longitudinal side and the electric conductors forms a power supply bus, and that different sections of the power supply bus are interconnected via a connecting cable, wherein the connecting cable is equipped with plugs (17, 18), which can be plugged into the connection boxes, and that for the electrical connection of multiple sections of electric conductors, the plugs (17, 18) comprise contacts extending around the electric conductors in a spring-loaded manner. the insulator comprises a plurality of receptacles which are open on the longitudinal side and one electric conductor is mounted in each receptacle, wherein the insulator having the plurality of receptacles which are open on the longitudinal side and the electric conductors forms a power supply bus, and that different sections of the power supply bus are interconnected via a connecting cable, wherein the connecting cable is equipped with plugs (17, 18), which can be plugged into the connection boxes, and that for the electrical connection of multiple sections of electric conductors, the plugs (17, 18) comprise contacts extending around the electric conductors in a spring-loaded manner.