Abstract: A pre-wired junction block incorporates cable receptacles at each of the four corners thereof. The receptacles are adapted to receive the three bare wires of a Romex®-type three wire cable. The junction block is provided with connection holes in a face thereof to receive short rigid jumper wires from electrical fixtures such as electrical outlets and electrical switches. The connection holes are identified on the face of the junction block with indicia to identify the hot and neutral connections of an outlet side of the junction block face, and are identified with indicia to identify connections to a switch side of the junction block face to properly receive the jumper wires of an electrical outlet or the jumper wires of an electrical switch respectively.