Abstract: A cable bus system is provided. The system may include a first cable bus support block mounted to a bus housing. The first block has a body with a front face, back face, and top face. The body of the first block defines a first cable receiving feature that extends from the front face to the back face of the body. First marking indicia is present on the front face of the first block. A second cable bus support block is adjacent the first block. The second block has a body with a front face, back face, and bottom face. The body of the second block defines a second cable receiving feature that extends from the front face to the back face of the body of the second block. Second marking indicia is present on the front face of the second block.