Return to the Appliances Forum | Post a Follow-Up

 o
3 prong dryer to 4 prong

Posted by heba (My Page) on
Wed, May 30, 12 at 3:15

I would like to install a new electric dryer ( 4 prong ) but I have a 3 prong receptacle ( 2 blacks and a braided silver wire coming form the panel ) I want the new dryer to be grounded, please help.
thank you


Follow-Up Postings:

 o
RE: 3 prong dryer to 4 prong

Your old dryer was grounded. The braided wire is/was the ground. If there was no unattached white wire, then you would need to run a new four wire cable if you have access. One of the black wires and the white, give you access to 110 volts. Otherwise all you have is 220 Volts.


 o
RE: 3 prong dryer to 4 prong

Is your unit 220v or 110v. Where are you located.


 o
RE: 3 prong dryer to 4 prong

Are you sure it requires 4 prong? It very well may, but I know my new Samsung can be wired either way. A note on the wiring diagram says that code requires 4 wire for service installed after 1996. In other words, 3 prong is ok if it's existing, but you're not allowed to run a new three wire line.


 o
RE: 3 prong dryer to 4 prong

New dryers in the US can use either 3 or 4 wires. You just need to follow the instructions in the manual and purchase the correct pigtail from HD or Lowes.

Changing the outlet to 4-wire will require an electrician to come in and redo the wiring from the panel to that outlet.


 o
RE: 3 prong dryer to 4 prong

I live in Tucson AZ and the new unit is 220v , If I use the old 3 prong cord for the new 4 prong dryer will it still be grounded ?


 o
RE: 3 prong dryer to 4 prong

3 wire is two hot and a ground. 4 wire is two hot, a neutral and a ground. I think you should be focusing more on whether you can properly connect the dryer with a 3 wire cord than if you can get away with deliberately miswiring a new 4-prong receptical.


 o
RE: 3 prong dryer to 4 prong

foodonastump is correct 3 wire dryer cord is grounded. 2 hot and one neutral/ground. 4 wire plug is just 2 hot 1 neutral 1 ground.

neutral and ground wires both go to the same place in the end, and that is ground anyway. with the 4 wire set up all it does is provide a second path to ground for more safety.

do not try to adapt one cord to work with the other outlet type, that would be a code violation. you should get the correct cord for your outlet and wire it to the dryer per your dryers instructions.


 o
RE: 3 prong dryer to 4 prong

can you explain the pigtail method ?


 o
RE: 3 prong dryer to 4 prong

Pigtail method? This method is to go out and buy the proper pigtail, or power supply cord. In your case it will be a 3-wire 3-prong pigtail. Then hook it up to your dryer per the manufacturer's wiring diagram.


 o
RE: 3 prong dryer to 4 prong

whats your opinion on installing a 4 prong out to the wall ( one neutral and 2 hots and leaving an open ground on the 4 prong outlet) since there is there is only 3 wires from the panel


 o
RE: 3 prong dryer to 4 prong

I, myself, have no opinion on that because I'm pretty ignorant on electrical and I'm honest enough to admit that rather than risk burning your house down. :) I do have suggestions though:

1) Post the specific model you wish to install, and perhaps someone will take the time to locate the wiring diagram to confirm whether it can be wired 3-wire 3-prong.

- and/or -

2) Post your question over on the Wiring Forum. Seems like an active forum where I'd guess that people put their reputations on the line with their answers.

Here is a link that might be useful: GW wiring forum


 o
RE: 3 prong dryer to 4 prong

"whats your opinion on installing a 4 prong out to the wall ( one neutral and 2 hots and leaving an open ground on the 4 prong outlet) since there is there is only 3 wires from the panel"

you will ten have a completley ungrounded chassis.

Whan you wire for a 4-caor the bond in the unit betweenthechasss ad combined neutral-ground is removed since th echassis wil be grounded by the fourth prong on the cord.

A 4-wire plug without any connection to the ground in the receptacle is not grounded at all.

A 3-wire cord shares the neutral nad ground on the same wire.

It is NOT ungrounded.


 o
RE: 3 prong dryer to 4 prong

I have no choice but to change my dryer plug, I moved to different cities in Texas. I went from a home to an apartment, my dryer came with a 3 prong wire but the apartment plug is 4 prong.
Do I need an electrician or is it simple enough to just match the wires on the back of the dryer's plug?


 o
RE: 3 prong dryer to 4 prong

If it's a recent 240v/30a dryer (i.e. made in last few decades) you can find 4-prong "dryer cords" in hardware or appliance stores. Unplug the dryer, remove the existing cord, and attach new one correctly including the ground wire to ground screw on dryer. Installation manual for dryer should have directions. Get someone knowledgeable to install the cord if you're not familiar with this stuff, but this is very doable.


 o
RE: 3 prong dryer to 4 prong

The dryer is not usually sold with the cord. You buy that separate or the store will often add it to the cost and put on the correct one when delivered I had to add a second laundry hook up to my two apartment home so when I moved my dryer I had to change the cord too. You can no longer install new wiring with the old 3 prong dryer outlet you have to use the 4 prong/wire set up for new installs. That is why newer homes have the 4 prong outlet. The 3 prong cords and outlets can still be purchased and used for wiring that met the old code

It's not hard as others said to change the cord. I remember mine had a diagram inside that showed how to hook up either cord.


 o
RE: 3 prong dryer to 4 prong

Lets be clear about the purpose of the neutral lead -- it returns unbalanced currents to the breaker box instead of sending them through the chassis, water pipes, etc. A proper 3-wire configuration will not have unbalanced currents, but a 4-wire could have unbalanced currents (e.g., using 120V for electronics).

So, if the unit is designed to be hooked up either 3-wire or 4-wire, then use whichever connection fits your wall receptacle. In the case of 3-wire, do not attach the neutral terminal in the unit to ground, let it float unless otherwise directed by the manufacturer. In case of 4-wire, bring the unit neutral to the receptacle neutral, and don't attach it to any ground terminals.

kas


 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!


Return to the Appliances Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.


Learn more about in-text links on this page here