Electrical network and method for protecting the network against electrical arcs

The network has a load (6) connected on one side to a voltage source (2) via a supply line (4) and on the other to earth, whereby the supply line is formed by two parallel conducting lines (4A,4B), each containing a fuse (12A,12B), to protect the network against a serial spark. Both fuses together are rated for the maximum load current. AN Independent claim is also included for a method of protecting a conductor network, especially a 42 Volt on-board vehicle electrical system.