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How do I replace an old 3 wire dryer cord with a new 4 wire power cord?

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  • white wire (neutral) goes in the middle, between the two hot wires
  • green wire goes to the case, should be a green screw or bolt to connect to
  • black and red wires are hot (110v each) one on each side of the neutral.
let me know if you get stuck name brand would help Mike

Posted on Jul 27, 2008

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1 Answer

Are all dryer power cords the same except for being either 3 or 4 prong?


They are universal. Just hook the new up the same way the old one was, assuming it was wired correctly.

Feb 02, 2016 | Samsung Dryers

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I just bought a new power cord for this dryer and the old one has three eyelets and the new one has 4. where do they all go?


Hi,
Here is a tip that will help you with changing your dryer plug. Dryer Cord and Wiring Dryer 3 Wire or 4 Wire



heatman101

Oct 19, 2010 | Frigidaire GLEQ2152ES Electric Dryer

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I am replacing a 3 prong cord with a 4 since we have moved into a newer newer home and the dryer has a white wire attached to the frame instead of a green wire. Is the the ground and can I just place the...


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Here is a tip that will help you with changing your dryer plug.


Dryer Cord and Wiring Dryer 3 Wire or 4 Wire




heatman101

Aug 23, 2010 | Roper RES7646KQ Electric Dryer

1 Answer

AEM407WZ Electric Dryer - 4-wire cord installation


red and black are the 2 power phase wires and go on L1 and L2 terminals or on an inline power block the 2 outer terminals(polarity)doesn't matter,then white is the center or N-neutral terminal, then green or green/yellow stripe is chassis safety ground and is connected to the metal frame of the unit

Mar 04, 2010 | Dryers

1 Answer

I am changing the 4 wire on my 2 yr old maytag dryer to a 3 wire to fit the recptical in my new house. Other then the 2 hots and 1 neutral connection, my dryer also has a white ground wire off to the side,...


So you have an, ahem... problem....you have a Code compliant dryer (with it's 4 wire cord and plug)....and have moved into an older home that is not Code compliant (with it's 3 prong receptacle outlet)....and this is fairly common.

At this point - you have two choices....replace the wiring from the dryer's breaker to the receptacle with all new 8/3 with ground romex (it more then likely only has 8/2 with ground now)....and replace the receptacle with a 4 prong grounding receptacle to match your dryer's cord....OR - as an alternative - you can replace the cord on your dryer with a 3 prong cord to match the existing dryer receptacle outlet.

Out of the 2 choices....the first one will bring the old wiring in the home up to current Codes (all NEW homes must have this 4 wire/4 prong set-up per Code...but older homes are grand-fathered)...but it is clearly the most involved, time consuming and most costly approach...and it is recommended only an electrician do this work. If this approach is taken....your dryer cord can stay as is...it will now fit the new receptacle outlet with no modifications.

The second approach - is to pick up a 3 wire 3 prong cord at your local hardware store to match the existing 3 prong receptacle.....and replace the 4 wire cord on your dryer with it. Although this is the least desireable - it is an allowed approach because this is an older home with existing wiring. This is a much less involved approach...all you need to buy is the 3 wire dryer cord (they come all ready to go) remove the 4 wire cord and install the 3 wire cord to your electrical connections at the back of the dryer. Hopefully...when the 4 wire cord was installed on your dryer, the ground strap wasn't removed completely (this is a metal strap that will connect the white wire to the metal frame of the dryer)...because now you will need to re-use the ground strap. For more on this....see the images of the differences of the 3 wire and 4 wire dryer hook-up at:
http://www.applianceaid.com/general.html#3to4

NOTE: the only real difference between the 3 wire cord and the 4 wire cord is now the white neutral and the ground are kept seperate in a 4 wire..the green ground will connect directly to the dryer frame....where in a 3 wire there is no seperate ground wire - ground and neutral are one and the same...the ground strap connects the frame to the white neutral. The 4 wire permits a better safety measure...in the event of an electrical problem (ground fault) in the dryer...the fault now has a seperate path to your panel's ground...and less chance of a shock from touching the metal frame of the dryer.

The choice of how to proceed is up to you....if you go with completely updating the dryer wiring from the breaker outward...I recommend an electrician do this work for you (it's about an hour's work...plus materials). Then your exisiting dryer's 4 wire 4 prong cord can stay as is....the electrician will install a 4 prong receptacle made to fit your cord.

If you go with simply replacing the dryer's cord....changing it to a 3 wire so it will fit the receptacle...make sure the ground strap is re-utilized as seen in the images at the site above.(also make sure all work is done with the dryer breaker (or fuse if a really old home) off before starting any work. If you change the cord yourself...make sure to reconnect in exactly the same manner as the previous cord was connected...(make a note on paper or take pictures so that there are no mistakes)..and that you tighten the nuts securely to the posts once the wire lugs are on them. Where you state you do not have a background in electrical work...you can have an electrician change this cord for you...(typically in under a half-hour)....or you can do it yourself - by carefully following the pictures.

The choice is yours...if it was me - I'd change the wiring from the breaker outward...making the older home meet today's current Codes and be complaint for this dryer..and then you wouldn't need to change a thing on the dryer....but you can go either way....Codes allow this grandfathering in older homes with existing wiring.

Feb 19, 2010 | Dryers

1 Answer

Need to replace existing three wire plug with new four wire plug. there are only three terminals to connect to. what do i do?


Based on your description....you have a Code compliant dryer (with it's 4 wire cord and plug)....and have moved into an older home that is not Code compliant (with it's 3 prong receptacle outlet)....and this is fairly common.

At this point - you have two choices....replace the wiring from the dryer's breaker to the receptacle with all new 8/3 with ground romex (it more then likely only has 8/2 with ground now)....and replace the receptacle with a 4 prong grounding receptacle to match your dryer's cord....OR - as an alternative - you can replace the cord on your dryer with a 3 prong cord to match the existing dryer receptacle outlet.

Out of the 2 choices....the first one will bring the old wiring in the home up to current Codes (all NEW homes must have this 4 wire/4 prong set-up per Code...but older homes are grand-fathered)...but it is clearly the most involved, time consuming and most costly approach...and it is recommended only an electrician do this work. If this approach is taken....your dryer cord can stay as is...it will now fit the new receptacle outlet with no modifications.

The second approach - is to pick up a 3 wire 3 prong cord at your local hardware store to match the existing 3 prong receptacle.....and replace the 4 wire cord on your dryer with it. Although this is the least desireable - it is an allowed approach because this is an older home with existing wiring. This is a much less involved approach...all you need to buy is the 3 wire dryer cord (they come all ready to go) remove the 4 wire cord and install the 3 wire cord to your electrical connections at the back of the dryer. Hopefully...when the 4 wire cord was installed on your dryer, the ground strap wasn't removed completely (this is a metal strap that will connect the white wire to the metal frame of the dryer)...because now you will need to re-use the ground strap. For more on this....see the images of the differences of the 3 wire and 4 wire dryer hook-up at:
http://www.applianceaid.com/general.html#3to4


NOTE: the only real difference between the 3 wire cord and the 4 wire cord is now the white neutral and the ground are kept seperate in a 4 wire..the green ground will connect directly to the dryer frame....where in a 3 wire there is no seperate ground wire - ground and neutral are one and the same...the ground strap connects the frame to the white neutral. The 4 wire permits a better safety measure...in the event of an electrical problem (ground fault) in the dryer...the fault now has a seperate path to your panel's ground...and less chance of a shock from touching the metal frame of the dryer.



The choice of how to proceed is up to you....if you go with completely updating the dryer wiring from the breaker outward...I recommend an electrician do this work for you (it's about an hour's work...plus materials). Then your exisiting dryer's 4 wire 4 prong cord can stay as is....the electrician will install a 4 prong receptacle made to fit your cord.

If you go with simply replacing the dryer's cord....changing it to a 3 wire so it will fit the receptacle...make sure the ground strap is re-utilized as seen in the images at the site above.(also make sure all work is done with the dryer breaker (or fuse if a really old home) off before starting any work. If you change the cord yourself...make sure to reconnect in exactly the same manner as the previous cord was connected...(make a note on paper or take pictures so that there are no mistakes)..and that you tighten the nuts securely to the posts once the wire lugs are on them. Where you state you do not have a background in electrical work...you can have an electrician change this cord for you...(typically in under a half-hour)....or you can do it yourself - by carefully following the pictures.

The choice is yours...if it was me - I'd change the wiring from the breaker outward...making the older home meet today's current Codes and be complaint for this dryer..and then you wouldn't need to change a thing on the dryer....but you can go either way....Codes allow this grandfathering in older homes with existing wiring.

Feb 08, 2010 | Dryers

1 Answer

Wire 3 prong cord


Electric Dryer How To Hook Up Cord pixel_trans.gifFor Three Prong Cords
the Center cord wire goes on the center terminal,
the left on the left ,
and the right on the right.

Note: There should be a ground strap or wire that runs from the center terminal to the dryer case.

For Four Prong Cords
the White cord wire goes in the center,
the Red on the Right,
the Black on the Left.
The green cord wire goes to the case or the external ground screw.

Note: Be sure to disconnect the ground wire or strap that runs from the center terminal to the case. In this Photo (A Whirlpool Dryer) I have ran the wire that runs from the center terminal, the Light Green wire, back to itself rather than cutting it off, just incase I need to put a 3 prong cord back on it some day. The whole purpose of this 3 prong / 4 prong thing is it separates the neutral from the ground. pixel_trans.gif pixel_trans.gif3 Prong Cord Whirlpool Dryer Example terminalblock.jpg 4 Prong Cord Whirlpool Dryer Example 4prongcord_small.jpg

Jul 02, 2009 | Maytag Neptune MDE5500AY Electric Dryer

1 Answer

Changing power cord from 4 to 3 prong


Hi,

See this link and read the article carefully - if your dryer already has a 4 wire cord, it should be replaced with same type.

http://en.allexperts.com/q/Electrical-Wiring-Home-1734/replacing-power-cord-dryer.htm

Apr 13, 2009 | Maytag Neptune MDE6700A Electric Dryer

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