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Mikeystone 05-06-2011 01:03 AM

220 outlet
 
Im installing a 3-prong outlet for a dryer. I understand the black and red are the hot wires and the green/copper is the ground. Do I just cap off the white wire on both ends?

sirsparksalot 05-06-2011 01:38 AM

NO! 3-prong cords must have the ground and neutral connected together inside the dryer. Normally, there's a metal strap that goes from the center neutral terminal to the chassis of the dryer.

Can you snap a pic of the inside of the dryer for us, and post it here?

sirsparksalot 05-06-2011 01:44 AM

Here's a pic of how the inside of the dryer is wired.

http://i249.photobucket.com/albums/g...dryer3wire.gif

Saturday Cowboy 05-06-2011 03:32 AM

You SHOULD install a 4 wire outlet and retrofit the dryer cord(easy). A 3 wire system(which is no longer legal to install for good reason) Has the neutral(white) connected to the plug and the ground is not used and CANNOT connect to the receptical(tho if metal box must connect to box.)

A three wire system used the neutral as a ground(or is it ground for a neutral:)). It is grandfathered in for previous installs, but should be upgraded if practical to a 4 wire system in which you have 2 hots a neutral and a ground.

Speedy Petey 05-06-2011 05:59 AM

Quote:

Originally Posted by Mikeystone (Post 642959)
Im installing a 3-prong outlet for a dryer. I understand the black and red are the hot wires and the green/copper is the ground. Do I just cap off the white wire on both ends?

Where are you installing this receptacle and why???

A new dryer circuit/receptacle install REQUIRES a 4-wire receptacle with a neutral AND a ground.

Even if you had a 3-wire there before I would change it.

sirsparksalot 05-06-2011 07:56 AM

What Cowboy and Speedy said!

I was under the impression that he had an existing 3-wire receptacle, and a 3-wire cord (not sure if one has to change the receptacle if it's already there).

But you should change the receptacle, yes, if at all practical.


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