Newer electric clothes dryers have a four-prong plug. You’ll need to install a four-slotted wall receptacle known as a 14-30R and connect it to a dedicated 30 A dual-pole circuit breaker in your electrical service panel. Installing a breaker or running wires to your main breaker box, as any electrical work, should be done by a qualified electrician or professional. This section of the article is for reference only and does NOT advocate homeowners doing their own wiring.
4.1 Verify the electrical requirements of your dryer.
4.2 Determine roughly how much electrical cable you’ll need to connect the outlet and the electrical panel. The dryer circuit will use NMWU 10/3 cable. It has four wires: two hot (red and black), one neutral (white), and a ground wire (bare or green).
4.3 Route the cable from the dryer area to the location of the electrical panel. Be patient: this 10/3 cable is stiff and can be hard to fish.
4.4 Position and secure the receptacle to the stud or wall. If you plan to install the receptacle on a masonry wall, you’ll need to use electrical conduit to protect the cable.
4.5 At the electrical panel, locate two adjacent available spaces for the new 30 A breaker.
4.6 Switch the main disconnect breaker to the OFF position. Verify that the power is off.
4.7 Bring the supply cable into the panel and fasten it with a cable connector.
4.8 Strip 6 to 8″ of sheathing from the cable, exposing the wires. Untwist the four individual wires and align them to their respective terminals.
4.9 Connect the neutral (white) and ground (bare) wires to their respective bars in the panel.
4.10 Connect the black wire and red wire to the two available terminals on the breaker.
4.11 Once the breaker is wired, install it into the electrical panel.
4.12 Wire the outlet. The brass or darker-colored screws are for the hot wires; the silver screw is the neutral terminal; and the green screw is for the ground wire.
4.13 Put the cover back on the receptacle.
4.14 Turn on the main breaker.
4.15 Turn on the new circuit breaker.
4.16 Check voltages. Using a voltmeter, check for 240 V between the left and right terminals; check for 120 V between the left or right terminal and the neutral terminal; check for 0 V between the neutral and ground terminal. Correct any improperly wired connections.
4.17 Update the panel directory to reflect the addition of your dryer.