Fit a nail guard into each notch, covering the new wires. Drive the plates down tightly making sure they are flush and not protruding from the stud surface.
In the center of each plate notch, cut a second, 3/4 inch notch for the cable. Make the depth about 1/2 inch to accept the cable thickness, but keep the entire notch depth to a maximum of 7/8 inch for load-bearing 2x4 studs and 1-7/16 inches for non load-bearing studs.
A two wire cable run from a light fixture to a switch on a wall. Its only function is to control the on and off state of the light. Underground Feed cable used to run electricity underground. The sheathing on this cable is thicker and more durable than the NM cable used for interior applications.
A plug-in device that will detect the wiring configuration of an electrical outlet. Through a system of lights this tester will confirm a receptacle is properly wired as well as indicate a problem with the wiring and what the problem is. This is important for polarized, grounded receptacles that can be improperly wired and still power a lamp or other simple test device.
After choosing the electrical source, decide where to cut the walls and ceilings to run the new cable. For example, to run from an existing wall receptacle up to a new ceiling light fixture, a small hole should be cut in the corner where the wall and ceiling meet. The top plate is then notched to pass the cable and afterwards a metal plate is attached over the notch to protect the wires.
Hold the wires together so the ends match up and twist them together in a clockwise direction using lineman pliers. Make 1 or 2 turns to form a solid union being careful not to dig into the copper with the plier jaws.
After cutting the hole, put the 2x4 between the joists again and set it so the outlet box sits flush with the finished ceiling surface. Have a helper hold a board over the outlet hole to support the box and keep it at the proper level while securing it in place with two, 3 inch deck screws through each joist. If needed, metal L-brackets may be added at the corners for more support.
A pipe through which an electrical cable is run to protect it from damage. Conduit is available in metal and pvc plastic. Conduit is required in places like unfinished basements where electrical wiring is exposed and therefore vulnerable to damage.