To install a 220-volt outlet, obtain the necessary permits, turn off the power, run a new cable from the sub-panel, cut a hole for the new outlet and attach the cable's wires to the new outlet. Hire a licensed electrician to make the connection at the breaker box.Continue Reading
To wire and install a 220-volt outlet:
Obtain any necessary building permits before beginning work and follow all building codes.
Turn off the power at the main panel before installing the new outlet.
Drill a 5/8-inch hole at the top of the sub-panel and feed through an MC 12-2 metal-sheathed electrical cable. Run the cable through the attic.
Use the metal electrical box to mark the area that needs to be cut, ensuring that the outlet is at least 30 inches from the floor. Cut out the drywall with a rotary cutout tool.
Feed the cable to the outlet opening and pull it through the back of the metal electrical box. Secure the cable to the box.
Attach the green grounding wire to the green grounding screw in the box and then screw the box to the wall. Remove the insulation at the end of the cable and attach the green wire to the green screw, the white wire to the silver screw and the black wire to the brass screw. Push the wires into the box and attach the outlet cover.
Hire an electrician to attach a new circuit to the breaker box. Turn the power back on and test the outlet.