A system for power distribution and communication over a two-wire network comprises a control unit (dedicated or distributed) configured to receive power from the two-wire network and provided with a transceiver circuitry connected to the two-wire network, a power converter unit having a power converter which converts incoming voltage to a DC-voltage of less than 50 V and feeds the DC-voltage to the two-wire network, and a power fuse unit with a power fuse identity connected between the power converter and the two-wire network. The power fuse unit forwards the DC-voltage to the two-wire network and comprises a transceiver circuitry connected to the two-wire network and a fuse. The system monitors an amount of power consumed in the network and activates a power switch in the power fuse unit when the amount of power consumed in the two-wire network exceeds predetermined limits.