An electric network architecture for confined environments, includes: a main network including a plurality of electric wires capable of supplying in parallel electric power along the confined medium to a same load, wherein each wire is protected and can be insulated at each end; a primary distribution assembly including at least one primary distribution subassembly including a selection element connected to at least one of the wires and to a dedicated electric power source; at least one secondary distribution assembly connected to at least a portion of the main network and for powering at least one dedicated load, wherein each secondary distribution assembly includes at least one selection element connected to an output terminal to which an electric load is to be connected, the selection element being capable of closing or opening the electric link established between the output terminal and at least one of the wires of the main network.