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Dryer

How do you convert a four prong plug on a dryer into a standard 3 prong plug? This is for an electric dryer.

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Posted 2013-02-09T22:24:34+0000  by maestro916 maestro916
 
It is very easy the only difference is the neutral and ground connections inside the dryer. I could explain it but I found a step by step that will help you better. http://electrical.about.com/od/appliances/ss/4prongto3prongdryercordss.htm
Posted 2013-02-10T04:31:49+0000  by jwatkins82

 

You would be better advised to convert the wall outlet to the newer 4 prong type. The switch to 4 prong was done for inherent safety reasons. It guarantees  good safety grounds.

Posted 2013-02-10T17:11:31+0000  by ordjen

Im curious about the “inherent safety reasons. It guarantees good safety grounds.”  3 prong plug has a bonding jumper from the neutral wire to the chassis ground on the dryer.  NEC Art. 250.140 allows a 3-prong cord-plug and the dryer frame Grounded to the Neutral for EXISTING Branch-circuits with (1) a #10 conductor-(2) an insulated Neutral (the White wire) and (3) if the Dryer circuit-breaker is in the same panel as the Service Disconnect.


 

http://www.homedepot.com/hdus/en_US/DTCCOM/HomePage/Know_How/Appliances/Changing_Dryer_Cord/Docs/Changing_Dryer_Cord.pdf

Posted 2013-02-10T18:11:31+0000  by jwatkins82

Separating the ground and the neutral lessens the chance that the ground could ever become "hot".

Posted 2013-02-11T07:59:58+0000  by ordjen

I think 2011 NEC 250.140 also lists an exception for instances where an equipment grounding conductor is not present in the outlet or junction box.

 

My personal opinion is that you should keep ground on its own with steel frame appliances, especially if the home is wired using MWBC aka “shared” neutral set up.

 

George 

 

 

Posted 2013-02-11T16:57:37+0000  by George_HD_CHI
 
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