Extending Power to Outlets with Metal Raceway

Extending Power to Outlets with Metal Raceway
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Electrical raceway, often called surface-mounted wiring, is a track of metallic or nonmetallic tubing that carries wiring across a wall surface, allowing you to use an existing electrical receptacle to power a new receptacle. When you use raceway to add a new outlet to a circuit, you don’t have to cut into your walls. Electrical raceway is designed for indoor applications in dry areas and must be properly grounded.

Wiremold’s heavy-duty, metal-component raceway system is an excellent solution for adding wiring for additional outlets, light fixtures or ceiling fans in a garage, workshop or basement. Your project can be made easier by using our Project Planner to map out your project. After installation, the raceway can be painted with latex paint to match your décor.

This project guide will walk you step by step through the installation of metallic raceway wiring for adding an electrical outlet.
 

Follow These Steps

Step One
Turn off the electricity
Turn off the Electricity to Your Starter Outlet
Turn off the power to your starter outlet at the circuit panel.

Step Two
Lay out the raceway path
Lay out the Raceway Path
1. Mark the location on the wall where you’d like the new outlet. Use a stud finder to locate a wall stud to mount to if possible.
2. Use the chalk line to draw a level line from the starter outlet to the new outlet position. Draw the line ¼ in. above the baseboard if your new outlet is at the same height as the old one. The raceway will be less noticeable if it runs along the baseboard.
3. Use the stud finder to find each wall stud along the chalk line between the wall outlets.
4. Use screws to attach the raceway support clips at the studs. If you can’t attach the clips to studs, use hollow wall anchors.

Step Three
Install the starter box base
Install the Starter Box Base
1. Double check that the power is off using the voltage tester.
2. Remove the faceplate and mounting screws from the starter outlet.
3. Pull the existing receptacle and wires through the opening in the back of the base plate.
4. Screw the base plate to the existing box.
5. Install a number 10 ground screw in the dimple on the starter box base.
6. Use pliers to break out the starter box knockouts.
7. Make sure the knockout matches the raceway profile used in your project.

Step Four
Position the new outlet
Position the New Outlet
1. Locate the new outlet at the same height as the starter outlet.
2. Attach the mounting plate with at least one mounting screw in a wall stud if possible. Use wall anchors if the plate is not over a stud.
3. Break out the knockouts on the new outlet box.
4. Install two mounting clips approximately ½ in. below the knockouts on both the starter box and the new receptacle box.
5. Position, but do not install, the elbow mounting plates ¼ in. above the baseboard directly under the knockouts on each outlet box.
6. Measure from the knockout in the starter box to the top of the bracket and the knockout in the new box to the top of that bracket.
7. Add 3/8 in. to each end to get the right length of raceway in order to slide over the tongue at each box or fitting.

Step Five
Cut the raceway
Cut the Raceway
1. Cut the raceway to length.
2. Smooth the edges with a file.
3. Insert bushings into each end.

Step Six
Install the raceway
Install the Raceway
1. Slide the short piece of raceway over the starter box tongue.
2. Use a mallet to tap the raceway into the support clips.
3. Slide the tongue on the elbow mounting bracket into the bottom of the raceway.
4. Screw the elbow mounting bracket to the wall.
5. Repeat this procedure at the new outlet box.
6. Measure the long piece of raceway that fits between the two elbows from the ends of each joint.
7. Add 3/8 in. to each end to get the right length of raceway in order to slide over the tongue at each box or fitting.
8. Cut the raceway to length, smooth the cut edges with a file and insert bushings in the raceway as in Step Five.

Step Seven
Run the wire
Run the wire
1. Measure the full length of the raceway, from the starter outlet to the new outlet. Add 2 ft. to the total length and cut this length of the THHN black, white and green wire.
2. Snake the end of each wire through the short raceway and into the starter box. Pull about 12 in. out of the box.
3. Snake the other end of the wire through the long piece of raceway and up into the new outlet box.
4. Slip one end of the long piece of raceway onto the elbow tongue. Snap the long piece into the mounting clips, then slip it onto the other tongue.
5. Snap the elbow cover pieces over the elbows.

Step Eight
Connect the wires
Connect the Wires
1. Starting with the new receptacle:
  • Wrap the end of the black wire around the bottom gold screw on the side of the receptacle.
  • Wrap the white wire around the silver screw opposite the gold screw.
  • Wrap the green wire to the green screw on the bottom of the receptacle.
2. Tighten all screws.
3. Tuck the wires and the receptacle into the box. Use the long mounting screws to attach the receptacle to the box. Attach the face plate.
4. Confirm the power is still off at the old receptacle. Wrap the old black wire, coming out of the wall, around the top gold screw on the side of the receptacle. Wrap the old white wire around the silver screw opposite the gold one.
5. Connect the old receptacle to the new wiring to power the new receptacle. Wrap the end of the black wire that feeds into the raceway around the bottom gold screw. Wrap the end of the new white wire to the silver screw opposite. Tighten both screws.
6. Cut a 6 in. piece of green wire and strip ¾ in. from each end to create a pigtail wire. Join one end of the pigtail with the end of the bare wire and the old green wire in the box using a wire nut. Wrap the other end of the pigtail around the green screw on the receptacle.
7. Tuck the wires and the receptacle into the box. Use the long mounting screws to attach the receptacle to the box. Attach the face plate.
8. Turn the power back on and test the receptacles.

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