Abstract: A pre-wired electrical circuit box for structures and/or distributive wiring, comprising a circuit box made of nonconducting material, adapted to be mounted to the structure or appendage of a building. A plurality of electrical circuit boards of insulating material, assembled coaxially in parallel, spaced relation and locked in angular relation to each other. A plurality of electrical fastenings or connectors attached to each of the circuit boards at their periphery in selected, individual, angularly-spaced pattern. The fastenings on each board are connected to each other in selected manner. The spaced boards are of lesser diameter than the container box, and are inserted into the box, coaxially therewith, and fastened in fixed angular position. A plurality of small diameter openings in the wall of the circuit box are provided so that ends of wires can be cleared of insulation and inserted through appropriate openings opposite each one of the fastenings on the boards.