TURN OFF POWER AT THE CIRCUIT BREAKER BOX. Turn off power at the circuit breaker panel box. MARK THE DRYWALL FOR THE NEW BOX. CUT THE DRYWALL. LOOSEN THE OLD OUTLET. FEED THE CABLE TO THE OLD BOX. CONNECT THE WIRES IN THE OLD BOX. MOUNT THE REMODELING BOX. WIRE THE NEW OUTLET. Click to see full answer. People also ask, how do you connect electrical wires to a junction box? Part 3 Connecting and Sealing the Wires Twist together same-colored wires. Creating the electrical circuit is a matter of color-matching. Use a wire nut to connect multiple wires. Install the ground wire into a metal junction box. Push all the wires into the box before sealing it. Beside above, what is the difference between old work and new work electrical boxes? Whatever the material, electrical boxes can be loosely divided into two types: New work boxes, designed to be installed just after the wall is framed but BEFORE the surfaces are finished with drywall. Old work (also called retrofit) boxes, designed to be installed AFTER the walls are finished. Moreover, can you use a junction box to extend wiring? If you do need to extend the wires, yes, a junction box would be needed. It must remain accessible. You’ve pretty well identified your two choices; if you don’t want to re-run longer cables, you’ll need to splice in some additional cable.How deep is an electrical outlet box?Single light fixture switches and outlet receptacles typically fit into standard rectangular boxes, also known as “single-gang” or “one-gang” boxes. They are generally 2 x 3 inches in size, with depths ranging from 1 1/2 inches to 3 1/2 inches.