Embodiments disclose a plug-in fuse element comprising a strip-shaped sheet metal part having a first end section, a second end section, and an interposed center section, wherein the first end section is a flat plug-in contact; the second end section is a connecting region configured to connect to a stranded conductor, and the center section is an overcurrent protection device. In some embodiments, a stranded conductor is connected on at least one end to a connecting region of at least one plug-in fuse element. In some embodiments, a wiring system includes at least one stranded conductor connected via a flat plug-in contact of a plug-in fuse element to a flat conductor. In some embodiments, a vehicle comprises the at least one wiring system.