How to Install Outdoor Lighting and Outlet | The Family The outlet is always hot, and the switch controls only the light. If you don’t have an outdoor box to tap in to, consider installing one on your house. You can expand the project to include additional outlets, switches and lights. The techniques for running the wire and mounting electrical boxes are the same. How to Put in Landscape Lighting | This Old House Run the cable up to the outdoor electrical outlet. Then use wire strippers to cut the cable and strip off ½ inch of the rubber insulation. Slide the stripped wires under the two terminal screws on the bottom of the transformer. Tighten the screws all the way to hold the cable securely in place.