Abstract: In order to improve an electrical supply network for on-board electrical systems of vehicles, comprising at least one network system with a current feed-in connection, with at least one load connection and with a supply line system which is guided from the current feed-in connection to the at least one load connection and has at least one current-carrying line harness and at least one protective casing surrounding this, in such a manner that an electric arc can either be avoided or when an electric arc is formed this can be terminated again as quickly as possible, it is suggested that the supply line system be provided with a detector line system which is connected at a first end to a detector circuit and is connected at at least one additional end to an end element, that the detector circuit generate a test signal which is influenced in the defect-free state by the detector line system and the end element and that the detector circuit detect a defect due to deviation of the test signal from a reference value

Abstract: In order to design the circuit arrangement for a control device for units connected to an electric supply network of a motor vehicle as load, comprising a control signal generator for generating a pulse-width modulated control signal, a power output stage with at least one power switch for supplying the respective load, wherein the power switch can be activated in a pulse-width modulated manner by the control signal applied to a control input thereof and has connections for connection to the supply network as well as to the load, one of these connection being formed by at least one conductor element, such that, on the one hand, line inductances which are as low as possible occur and, on the other hand, electric resistances which are also as low as possible it is suggested that a current connection carrier on the network side and a current connection carrier on the load side be provided in the at least one power output stage and that the at least one conductor element of each power switch be connected to one o