A snap switch wired under the provisions of this exception and located within reach of earth, grade, conducting floors, or other conducting surfaces shall be provided with a faceplate of nonconducting, noncombustible material or shall be protected by a ground-fault circuit interrupter."
Leave the device hanging free so it doesn’t make contact with anything and test it to be sure the wiring is correct. Flip the switch on and turn the power back on at the breaker box to test the light circuit. Use a receptacle analyzer to test a receptacle for proper wiring. If there’s a problem with the wiring turn the power off again and correct the problem.
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.
Electric cable with spiral metal sheathing. Early armored cable, BX cable, carried two electric wires with no ground. The metal sheath served as the ground. Later versions carried an aluminum ground wire, wound in the spiral. Newer armored cable includes an insulated ground wire.
A current-carrying wire in an electrical circuit, also called the grounded circuit wire, it serves as the return path for current, and is connected to ground at the service panel. In household electrical circuits the neutral wire is colored white or gray. Some circuits make use of the white or gray wire as a hot wire, when this is done it will be marked with black tape or paint to identify it as hot.
A junction box has several holes with removable plugs in the sides and back. Choose holes conveniently located for the cables you are splicing and remove the plugs. Have a cable clamp for each one and loosen the screws to open the collar. Pull about 8 to 10 inches of cable through the clamp and tighten the collar around it so it’s firmly held but not pinching the plastic.
Leave the wires bent into hooks if you will be using the terminal screws to connect the new device. If you will be using the holes in the back, cut the wires right below the hook so you will have a straight piece to insert into the holes. Strip about ½inch of insulation off the copper to make the connection.
This page offers some options for locating an electrical source for a new wall receptacle or a light fixture, and running the new cable required. To make this job easier, it’s best to have a second person at one end or the other of a new run, to sight the end of the fish tape and help guide cable. Also be sure to always turn off the affected circuits before working on household electricity.