A method for the attachment of marking labels to a plurality of electrical devices that can be arranged on a support rail, each having a marking field to which a marking label that can be inscribed can be secured, the electrical devices being arranged side by side in a row along a longitudinal direction to provide an assembly, such that the marking fields of the electrical devices connect to one another along the longitudinal direction, and form a continuous row extended along the longitudinal direction, includes: attaching a marking strip, having a plurality of marking labels which are associated with the marking fields of the electrical devices and which can be inscribed using a laser inscription device, along the row of electrical devices; and separating the marking labels, such that at least one marking label is arranged on the marking field of each electrical device.