Tape each joint after applying a layer of compound. Water may assist embed the tape if the compound is thinned down a little. Using the 6-in. knife, smooth out any bubbles in the tape by dragging the tape outward from the center toward the ends.
When you’re installing a non-metallic electrical cable, you must identify the sections of the cable: the outside sheath (the jacket) and the interior conductors. What seems to be colored “wire” is really a sheath that covers the copper wires within.