Wiring For A Dryer

wiring for a dryer

Installing wiring for a dryer is not as hard as you may think. Whether you are installing a dryer outlet to have a second dryer in your house or just moving your existing dryer to a new location this article will help you wire the dryer outlet and breaker in the electric panel. Current building codes require clothes dryers to have a 4 wire cable, 2 hot wires, 1 neutral and a ground. Dryers use a 10/3 wire and a 30 amp 220 volt breaker in the electrical panel.

When planning the new location of your dryer be sure to consider the length of the dryer vent and the length of dryer cords. Dryer vents can be up to 14 feet with 2 90 degree bends. If you need more bends then you must deduct 2' for each additional bend. The wiring for a dryer and the dryer outlet must be located close to your dryer location because the pig tails on most dryers are only 4' to 6' long.

brief how to

In this article, you will find information about:

  1. Pick A Outlet Location For The Outlet Next To The New Dryer
  2. Pull The 4 Wire (10/3 AWG Cable) Between Panel And The Dryer Wall Box
  3. Pull The Cable Into The Wall Box
  4. Wire The Outlet
  5. Pull The Feeder Cable Into The Main Electrical Panel
  6. Wire The Circuit Breaker
  7. Put The Covers On The Breaker Panel And Outlet And Test The Circuit

tools and materials

  • Handy box rated for a 30 amp dryer outlet, it should come with a cable clamp
  • Flat head screw driver
  • Phillips head screw driver
  • Wire strippers
  • Needle nose pliers
  • Non-contact proximity tester

step 1 Pick A Outlet Location For The Outlet

New Construction: If you are working on a wall that is unfinished, like a unfinished basement you will simply attach the new dryer electrical box to a wall stud.

Existing Construction: If you are wiring the dryer outlet on a finished wall with drywall then you will need to locate the stud closest to your desired outlet location and cut a hole in the drywall large enough to install the outlet wall box. After the box location is determined you will need to fish the wire thru the wall to the breaker panel. It is usually easiest to go down thru the floor into a crawl space or basement.

Install a electrical box that is made and rated to be used with the 30 amp dryer outlet. It should have a cable clamp attached to the box to clamp the new wire coming into the box.

step 2 Pull The 4 Wire (10/3 AWG Cable) Between Panel And The Dryer Wall Box

Current codes require a 4 wire cable (line 1, line 2, neutral, and ground), to be installed for 30 amp dryer circuits. This is called a 10/3 cable, the ground wire is not named in the name. Dryers use a 30 amp 220 volt circuit breaker and a 30 amp cable requires a 10 awg cable.

step 3 Pull The Cable Into The Wall Box

  • Pull the dryer cable into the wall box and leave about 12 inches of wire hanging out the front.
  • Tighten the cable clamp screws onto the cable, make sure it is snug but don't crush the cable.
  • Remove the outer sheathing from the cable starting about 1/2" from the cable clamp to the end of the cable.

dryer outlet box

step 4 Wire The Outlet

There are 4 wires used to wire a 30 amp dryer circuit. The circuits require a #10 4 wire cable, Red, Black, White and Green. The Red and Black wires are interchangeable between the two side terminals on the dryer outlet.

Red And Black Wires: The red and black wires go to the terminals on the sides of the dryer outlet. These two wires are interchangeable between the left and right sides. It does not matter which side they are on but they cannot go to the ground or neutral terminals.

White Neutral Wire: The neutral wire is white and must go to its terminal on the back of the outlet. The white wire goes to the neutral terminal which is the center terminal on the bottom of the outlet. The neutral terminal is usually labeled "white" or "neutral"

Green or Bare Copper Wire: Ground wire goes to the center terminal on the top of the outlet. The ground is usually labeled "ground", "gnd" or "green".

wiring for dryer back

step 5 Pull The Feeder Cable Into The Main Electrical Panel

Bring the new dryer cable into the main electrical panel by doing the following:

  • Remove a knockout
  • Install the cable clamp in the knockout hole
  • Pull the cable into the electrical panel through the cable clamp
  • Tighten the cable clamp screws onto the cable
  • Remove the outer sheathing from the feeder cable like you did in the outlet box

wiring dryer breaker panel

step 6 Make Sure There Is Room In The Breaker Panel

Make Sure You Have Space For The New Dryer Circuit In The Breaker Panel: The 30 amp breaker in the electric panel that will feed the dryer circuit will take up two slots in the electric panel. If there is only one slot or no slots open you will need to add slots by removing two existing single pole breakers and installing slim breakers that allow for two circuits per single slots in the panel. This will give you the extra space you need to install the breaker for the dryer.

Safety Note: Working with electricity is very dangerous and can kill you. Before working on the main electrical panel you must turn the power to it off for safety. Turn the power off by turning the main circuit breaker feeding the panel to the off position. Remove the face of the panel and double check that there is no power in the panel using a electrical tester.

step 6 Wire The 30 Amp Circuit Breaker

Neutral Wire, White: Remove 1/2" of the wire insulation from the white neutral wire and attach it to the neutral bus bar.

Ground Wire, Green Or Bare: Remove 1/2" of the wire insulation from the green ground wire and attach it to the ground bus bar by installing it into one of the lugs and tightening the lug onto the wire.

Red Wire: Remove 1/2" of the wire insulation from the red feeder wire and attach it to one of the lugs on the new circuit breaker. (sometimes this wire is black with a red stripe on it)

Black Wire: Remove 1/2" of the wire insulation from the black feeder wire and attach it to the remaining lug on the new circuit breaker.

double pole breaker install

step 8 Install The Breaker Into The Main Electrical Panel

Install the new feeder breaker into the main electrical panel by hooking the tabs on the bottom of the breaker onto the lip in the panel and pressing the other end of the breaker onto the bus bar. Before installing the cover on the panel you may need to remove a face plate knock out so the breaker will fit thru the face of the panel cover. After removing the knock out make sure the new breaker is in the off position and replace the cover by screwing it on.

Turn the main breaker that feeds the main electrical panel on and then turn on the new 30 amp breaker. Test your new outlet by inserting your proximity tester into the dryer outlet.

30 amp breaker for wiring a dryer

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