In order to provide an electrocoating plant for coating workpieces, in particular vehicle bodies, comprising at least one immersion bath, in which at least one electrode is disposed, a conveying device, which brings the workpieces into the immersion bath and out of the immersion bath again, and a power supply device, which generates from an a.c. input voltage an output voltage, in particular a d.c. output voltage, one output potential of which is applied to at least one of the workpieces to be coated and the other output potential of which is applied to at least one of the electrodes disposed in the immersion bath, which enables an individual output potential to be applied to each workpiece in a simple manner, it is proposed that the power supply device comprise at least one current control unit which moves together with a workpiece associated with the current control unit through at least one section of the electrocoating plant and provides the output potential for the workpiece associated with the current control unit.