An automatic monitoring system for monitoring the integrity of a wiring having a number of cables, the monitoring system having an integrity measuring unit designed to be coupled to the electrical wires in order to carry out measurements and check for the presence of faults along the electrical conductors, and a detection unit to detect a voltage present in the electrical wires and to enable the integrity measuring unit in case the voltage has a predetermined relation with a voltage threshold, indicating the fact that the electrical load is not powered by the power supply source. The integrity measuring unit has an impedance measuring circuit to apply a measurement signal to a circuit formed by the pair of electrical wires and to obtain a value of the impedance of the same circuit. The integrity measuring unit checks for the presence of a fault depending on the impedance value.