Step 4 · Run Wiring and Connect to Box
Carefully pull the electrical cable from its source (e.g., ceiling fixture, switch, or junction box) through the wall cavity to the installed electrical box. Leave sufficient slack (about 6-8 inches) of wire extending from the box. Strip about 3/4 inch of insulation from the ends of the black (hot), white (neutral), and green or bare (ground) wires using wire strippers.