Make sure the power is off to the electrical box and, if you have to use a ladder, be sure to secure it before you start.
Seal any gaps you find between the electrical box in the wall and the siding with silicone caulk. Cut the end off a tube of silicone caulk, mount it in a caulking gun and squeeze enough caulk into the gap to adhere to both sides of the gap. Use any small, flat stick to smooth it down so that it closes the gap.
If the fixture came with a strapping plate to attach it to the box, screw this plate into the two holes on either side of the box. Use the machine screws that came with the fixture.
Prepare the ROMEX® wire in the box: Measure out about 6 inches and cut around the plastic sheathing with a utility knife, being careful not to cut into the wire strands underneath. Pull off the sheathing. Use the splicing tool to remove about 1/2 inch of plastic from the ends of the black and white wires. Pass the wires through the rubber weatherproofing gasket, if there is one.
Use a green grounding screw to attach the bare ground wire to a metal box to ground it. If the fixture has a ground wire, twist the ground wires together and wrap them around the grounding nut in the box, if there is one. Push the wires directly into a plastic wire nut to keep them out of the way. Using pliers, twist the white wires from the box and the fixture together in a clockwise direction. Screw on a wire nut. Repeat with the black wires. Push these wires into the box, making sure the nuts are separated from each other.
Seat the fixture against the wall with the gasket in between and affix the fixture to the box using the screws that are provided. Make sure it is tight.
If there is no gasket, apply a bead of silicone caulk around the outside of the fixture where it contacts the wall.
Turn on the power.
Things You Will Need
- Silicone caulk
- Utility knife
- Wire splicer
- Wire nuts
- Green grounding screw
- If the siding on the house prevents the gasket from making a good seal, add a little silicone caulk. Sealing out moisture will prevent corrosion and prolong the life of the fixture.