Electrical network for a confined environment intended to transport electric power from at least one electric power source to a plurality of electrical loads: a) the electrical network including a main electrical network including a plurality of electrical conductors that are electrically insulated from one another, capable of distributing electric power between a primary distribution assembly of the at least one electric power source and a secondary distribution assembly to the plurality of loads; b) wherein the primary distribution assembly includes, for each electric power source, at least one primary distribution sub-assembly selector means, which selector means includes a plurality of switches, which switches: - include a common terminal, common to all switches of the selector means considered, intended to be connected to a terminal of the corresponding electric power source; - each include a second terminal connected to one of the electrical conductors of the main electrical network; c) wherein the secondary distribution assembly includes, for each electrical load, a secondary distribution sub-assembly selector means, which selector means includes a plurality of switches, which switches: - include an electrical output terminal, common to all switches of the selector means considered, intended to be connected to the corresponding electrical load; - each include a second terminal connected to one of the electrical conductors of the main electrical network; and d) the electrical network including an instrumentation and control circuit adapted to manage the electrical network, and other devices for measuring voltages and currents at the primary sub-assemblies and secondary assemblies, so as to ensure, for each electrical load, by actions carried out by the instrumentation and control circuit on the switches of the secondary distribution sub-assembly selector means associated with each electrical load, the closing or opening of one or more electrical connections from among the electrical connections established between the electrical output terminal and the relevant electrical conductors of the main electrical network and the power supply to the corresponding electrical load with electric power, in a dynamic manner, and so as to locate and insulate a fault in the electrical network, based on the voltage and current measurements and the variations thereof at the primary sub-assemblies and secondary assemblies. a) the electrical network including a main electrical network including a plurality of electrical conductors that are electrically insulated from one another, capable of distributing electric power between a primary distribution assembly of the at least one electric power source and a secondary distribution assembly to the plurality of loads; b) wherein the primary distribution assembly includes, for each electric power source, at least one primary distribution sub-assembly selector means, which selector means includes a plurality of switches, which switches: - include a common terminal, common to all switches of the selector means considered, intended to be connected to a terminal of the corresponding electric power source; - each include a second terminal connected to one of the electrical conductors of the main electrical network; - include a common terminal, common to all switches of the selector means considered, intended to be connected to a terminal of the corresponding electric power source; - each include a second terminal connected to one of the electrical conductors of the main electrical network; c) wherein the secondary distribution assembly includes, for each electrical load, a secondary distribution sub-assembly selector means, which selector means includes a plurality of switches, which switches: - include an electrical output terminal, common to all switches of the selector means considered, intended to be connected to the corresponding electrical load; - each include a second terminal connected to one of the electrical conductors of the main electrical network; and - include an electrical output terminal, common to all switches of the selector means considered, intended to be connected to the corresponding electrical load; - each include a second terminal connected to one of the electrical conductors of the main electrical network; and d) the electrical network including an instrumentation and control circuit adapted to manage the electrical network, and other devices for measuring voltages and currents at the primary sub-assemblies and secondary assemblies, so as to ensure, for each electrical load, by actions carried out by the instrumentation and control circuit on the switches of the secondary distribution sub-assembly selector means associated with each electrical load, the closing or opening of one or more electrical connections from among the electrical connections established between the electrical output terminal and the relevant electrical conductors of the main electrical network and the power supply to the corresponding electrical load with electric power, in a dynamic manner, and so as to locate and insulate a fault in the electrical network, based on the voltage and current measurements and the variations thereof at the primary sub-assemblies and secondary assemblies.