How To Install Electrical Conduit Indoors

 
Running conduit indoors
 

Steel electrical metal tubing (EMT) conduit is designed to safely enclose and protect the wires that distribute power throughout your home. It is the most common type of indoor electrical conduit, due to its easy assembly and inexpensive installation. EMT can be surface mounted in garages and basements or installed before the drywall goes up in new or existing construction.

 

This project guide will show you the step-by-step how to install EMT in a garage to add an electrical outlet at workbench height. Your project may not be exactly like this one, but for most indoor projects, the steps are similar.

 

Preparation

 

• Check local building and electrical codes before running conduit to ensure compliance.

 

Safety

 

• Turn off the electricity at the outlet from which you will draw power.

 

Savings

 

• Save money by running the conduit yourself.

• Save time by measuring and diagramming your project. Take the diagram with you to the store where an 
  associate can help you pull the correct materials.


WHAT YOU NEED FOR THIS JOB:

TOOLS:

 

MATERIALS:


Step 1: Turn off the electricity to your starter outlet

Turn off the electricity to your starter outlet Turn off the power to your starter outlet at the circuit panel.
  

Step 2: Lay out the conduit path

Layout the conduit path

• Use a stud finder to locate a wall stud for mounting. Mark the location for the new
  outlet on the wall.  

 

• Use a level and chalk line to draw a level line from the starter outlet across the wall
  and up to the new outlet position. 

  

Step 3: Remove the starter outlet

Remove the starter outlet

• Use a voltage tester to ensure the power is off to the starter outlet.  

 

• Unscrew the faceplate from the starter outlet. 

 

• Remove the outlet. 

 

• Detach the wires. 

  

Step 4: Attach the metal outlet box

Attach the metal outlet box

• Remove the 1/2-inch knockout in the new metal outlet box to provide a hole
  for the conduit. 

 

• Mount the open 4x4 receptacle onto the existing 4x4 with screws. 

 

• Insert the setscrew or compression connector into the knockout.  

 

• Screw the outlet box to the wall stud. 

  

Step 5: Measure the conduit

Measure the Conduit

• Insert one end of the conduit into the 90-degree sweep connector that will turn the
  conduit to continue up the wall.  

 

• Hold the conduit between the outlet box and the corner where the conduit will go
  up the wall.  

 

• Mark the correct length on the conduit, keeping in mind that the pipe will slide
  about 1 in. into the setscrew or compression connector. 

  

Step 6: Cut and ream (deburr) the EMT conduit

Cut and ream the EMT conduit

• Cut the conduit to length with a hacksaw. 

 

• Ream or deburr the inside of the EMT conduit using pliers or a conduit reamer.

  

Step 7: Attach the conduit to the ceiling

Attach the Conduit to the Ceiling

• Slide the conduit all the way into the fitting. 

 

• Tighten the setscrew or compression connector. 

 

• Tighten the connection between the conduit and the sweep. 

 

• Screw the conduit straps into the wall to attach the EMT conduit at least every
  10 ft. or as needed. 

  

Step 8: Measure, cut and attach the vertical run of conduit

Measure, cut and attach the vertical run of conduit

• Insert the length of conduit into the 90-degree sweep in the ceiling. 

 

• Mark the correct length of the conduit between the sweep elbow on the ceiling and
  the box to be mounted on the wall.

 

• Cut and remove the burrs from the conduit as in Step Six.

 

• Attach the vertical run of conduit to the wall as in Step Seven.

  

Step 9: Position the new metal outlet box

Position the new metal outlet box

• Mark the position, but don’t yet attach, the new outlet box.  

 

• Remove the 1/2-inch knockout providing a hole for the conduit. 

 

• Insert a setscrew or compression connector in the 1/2-inch knockout.

  

Step 10: Attach the new outlet box

Attach the New Outlet Box

• Attach the outlet box to the conduit. 

 

• Tighten the connector. 

 

• Screw the outlet box to the wall. 

 

• Use a hammer and screwdriver to tighten the two connector locknuts in the
  outlet box.  

 

• You are now ready to run electrical wire through your conduit.