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I have a 3 prong to change to a 4 prong cord on my dryer

The problem is the 3 prong wires on there are not color coded except for a green wire that is separate from the other 3 but not attached to the plug. And on the 4 prong plug the wires are color coded and have 4 wires instead of 3. How do I hook the 4 prong cord wires up? The dryer is only about 3 years old, nothing fancy.

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  • pjw01 Feb 07, 2010

    Ok this sort of helps. The 4 prong cord has colored wires, green, red, black and white just the dryer terminal block doesn't. So just to make sure which colors are the hot leads and which is the neutral color. I think I know but just want to make sure. Thanks.

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The following link explains how to correctly install a 220VAC appliance cord to your dryer:

http://www.fixya.com/support/r3575913-installing_a_220_vac_appliance_cord

Read through the instructions provided and let me know if you have questions. This advice is how to convert from a 3 prong to a 4 prong appliance cord. You simply match the corresponding colors of the wires on the cord you intend to attach to the matching colors at the terminal block on the back of the dryer. If the wires are not color coded at the terminal block, the outer two wires (left and right) are the HOT leads, the center wire is the Neutral. Make sure the neutral ad ground wires remain independent of each other in a 4 wire configuration. The green wire should be terminated on a ground lug on the equipment cabinet while the neutral is terminated at the terminal block.

Let me know if you require further assistance. I hope this help you.

Posted on Feb 07, 2010

  • Jeff Rockwell
    Jeff Rockwell Feb 09, 2010

    RED - HOT (120VAC)

    BLACK - HOT (120VAC)

    WHITE - NEUTRAL (0 VAC)

    GREEN (or BARE COPPER) - GROUND



    At the terminal block the outer two connections (LEFT and RIGHT) are the HOT leads. The center terminal is NEUTRAL. Ground will be connected to a ground lug on the equipment cabinet.



    NOTE: If there is a ground strap connected to the neutral terminal at the terminal block REMOVE it.

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1 Answer

I need to change my 3 prong to a 4 prong


Unplug the dryer then remove the terminal block cover and disconnect the 3-prong cord from the dryer. Note that the cord has red , black, and white wires but sometimes the red and black wires are both replaced by same color wire, usually gray and can switch places. There's also a ground strap wire also connected to the center terminal together with the white (neutral) wire.

Get yourself a 4-prong cord and note that it has red, black, white, and green/yellow wires but sometimes, like the 3-pronged one, the red and black wires are both replaced by same color wire, usually gray and can also switch places. All you have to do now is connect the 3 wires in the same manner they are connected as 3-prong cord to the terminal block. The ground strap wire now just need to be connected to the remaining 4th wire, the green/yellow wire instead of the center terminal together with the white (neutral) wire. Reinstall the terminal block cover and it's done.

It can be observed that converting a 3-prong cord to 4-prong cord is merely splitting the neutral line and the ground thereby increasing the number of prongs from 3 to 4 whereas, on the other hand, converting a 4-prong cord to 3-prong cord is merely joining the neutral line (white) and the ground (green/yellow) thereby reducing the number of prongs from 4 to 3.. The links below might enlighten you further on this matter.

Four-prong to Three-prong Electric Dryer Conversion
Three-prong to Four-prong Electric Dryer Conversion

Aug 21, 2011 | Kenmore Dryers

1 Answer

I have a four prong clothes dryer plug that needs to go in a three prong outlet - 220v. Any ideas?


It's either you convert the 3-prong outlet to 4-prong or the 4-prong cord to 3-prong. But the latter is easier and more feasible. Unplug the dryer then disconnect the 4-prong cord from the dryer. Note that it has red, black, white, and green/yellow wires but sometimes the red and black wires are both replaced by same color wire, usually gray. The red and black wires are lines L1 and L2 reversibly, meaning they can switch places, while the white and green/yellow wires are the neutral line and ground, respectively.

Get yourself a 3-prong cord and note that it has red , black, and white wires but sometimes, like the 4-pronged one, the red and black wires are both replaced by same color wire, usually gray and can also switch places. All you have to do now is connect these 3 wires in the same manner they are connected as 4-prong cord to the terminal block. The wire strapped to the dryer cabinet and connected to the green/yellow wire of the 4-prong cord wire is now left hanging. The last step is to connect this hanging strap wire to the same terminal on the terminal block (center) where the white wire (neutral) is connected and it's done.

It can be observed that converting a 4-prong cord to 3-prong cord is merely joining the neutral line (white) and the ground (green/yellow) thereby reducing the number of prongs from 4 to 3. On the other hand, converting a 3-prong cord to 4-prong cord is merely splitting the neutral line and the ground thereby increasing the number of prongs from 3 to 4. The link below might enlighten you further on this matter.

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1 Answer

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You have to replace the dryer's 3-prong cord to 4-prong. Get yourself a 4-prong cord then on the terminal block at the rear of the dryer, connect the wires of the 4-prong cord to where the same wire colors (red, black, and white) of the 3-prong cord connects to. The only modification needs to be done is on the green/yellow stripe wire that connects from the white wire terminal to the dryer's cabinet. Remove this wire (green/yellow stripe) from the white wire terminal then connect it to the same wire color (green/yellow stripe) of the 4-prong cord and you are done. The new wire configuration would then be red, black, and white on the terminal block and green/yellow stripe wire on the cabinet.

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I need to change out my 3 prong dryer power cord with a 4 prong dryer cord, but unable to figure out where the wires go on the new 4 prong power cord, because the one on there is grey and not color coded...




Changing from 3 to 4 wire hookup on a electric dryer:
Power cord help for 3 & 4 prong dryer cords
This is an example of a three wire connection dryer cord hookup. Notice that there is a ground strap connected from the common center terminal to the frame of the terminal block. Place the center wire of the cord on the center terminal [ one with the ground ******** it ] and the other two wires will be placed on the outer terminals and it doesn't matter which wire goes right or left. Get the center wire of the cord right and you are in business.
This is an example of the 4 wire dryer cord hookup. Notice that the ground strap has been removed from the terminal block frame and folded back onto the center terminal for storage. You can see the colors of the other hookups. TIP: White always to the middle.

Below are a few websites.
http://www.applianceaid.com/general.html#3to4


http://www.american-appliance.com/catalog/newsdesk_info.php?newsPath=10&newsdesk_id=5

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1 Answer

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Always disconnect electricity before beginning this process.

All the 4 wire cords I have seen are color-coded. The white wire goes to the middle terminal, the green wire goes to any screw you can reach that goes into the metal case of the dyer. The red and black go to the outside terminals of the block and while it doesn't matter which color goes to which terminal I usually follow the color code of the interior dryer wiring that already exists. Good Luck.

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They wire in the same except the green wire will go to a ground screw which should be right in the same area with a green color to it. If no ground screw, hook the green together with the white (center) wire. Hope this helps!

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2 Answers

Amana Dryer


there should be instructions on the cord that you purchased. if not here it is, on your dryer, the 3 prongs are L1-N-L2.. and the green is a ground L1 line 1, L2 line 2, and N nuetral. L1 and L2 dont make a diff. as long as the whie(nuetral) is in middle terminal and the green screws to hte ground screw

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