Abstract: A method for identification of a power supply source, a power supply system and a system having at least one load is disclosed. The at least one load receives power from the power supply system and makes measurements of the AC output signal of the power supply source. A supervisory device operatively coupled to the at least one load is disclosed. The supervisory device receives measurements from the at least one load and determines an identification of the power supply source of the power supply system by demodulating and decoding the received measurements.

Abstract: The device for parallel connection of a plurality of electrical feeder units comprises a power output socket, and for each feeder unit: a connector equipped with a power input plug, and at least one power conductor between said plug and the output socket. The connector comprises detection means designed to detect connection of said connector to the feeder unit. A controlled switch equipped with a control input is connected in series on the at least one power conductor, said control input being coupled to the detection means, detection of connection of the connector to the feeder unit enabling closing of said switch.