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#25418 - 05/07/03 03:38 PM Dryer - 3 or 4 prong  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
For new installations are you using 4 wire 4 prong plugs, or 3 wire 3 prong?
I've seen dryer recepts with the neutral and ground tied together on a 3 prong plug.


The Golden Rule - "The man with the gold makes the rule"

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#25419 - 05/07/03 03:47 PM Re: Dryer - 3 or 4 prong  
ThinkGood  Offline
Member
Joined: Aug 2002
Posts: 1,081
Milwaukee, WI


#25420 - 05/07/03 07:36 PM Re: Dryer - 3 or 4 prong  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,875
NY, USA
Al,

New installations must be 4 wire.
see 250.142(B)

Bill


#25421 - 05/07/03 10:42 PM Re: Dryer - 3 or 4 prong  
golf junkie  Offline
Member
Joined: Apr 2001
Posts: 507
York, NE
We have been doing 4 wire dryer and range plugs since the '99 revision, I believe.

The owner is usually PO'ed because then we also have to install a new tail on the appliance.

FWIW
GJ


#25422 - 05/08/03 11:17 AM Re: Dryer - 3 or 4 prong  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
I assume this includes range plugs too. Kinda strange that in the years past they were using the ground wire for a current carring conductor for the 120v clocks and timers in these appliances.


The Golden Rule - "The man with the gold makes the rule"

#25423 - 05/08/03 06:13 PM Re: Dryer - 3 or 4 prong  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
aldav53,

The equipment ground conductor has never been permitted to be used as the neutral for range and dryer receptacles. When using a 3-wire receptacle the neutral is used to ground the frame of the range or dryer.

Curt


Curt Swartz

#25424 - 05/08/03 06:45 PM Re: Dryer - 3 or 4 prong  
iwire  Offline
Moderator
Joined: Jan 2003
Posts: 4,391
North Attleboro, MA USA
In my area normal practice was 10/2 RX for dryers 6/2 AL SE for stoves, the bare was connected to the outlet box as ground and to center terminal of the plug.

For myself I am glad for the change to 4W plugs, if for nothing else but consistency.


Bob Badger
Construction & Maintenance Electrician
Massachusetts

#25425 - 05/08/03 08:11 PM Re: Dryer - 3 or 4 prong  
aldav53  Offline
Member
Joined: Aug 2001
Posts: 545
Chandler, AZ USA
Yes the 10-2 wire bare were used as grounds but we all know dryers can have 120v timers etc.


The Golden Rule - "The man with the gold makes the rule"

#25426 - 05/08/03 08:54 PM Re: Dryer - 3 or 4 prong  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,875
NY, USA
Was 10-2 w/gr ever legal for Dryers?

I thought only SE cable or 10/3 Wo/gr were legit. No books on me at the moment though.
Anybody?

Bill


#25427 - 05/08/03 09:10 PM Re: Dryer - 3 or 4 prong  
caselec  Offline
Member
Joined: Apr 2002
Posts: 558
San Jose, CA
Bill,

I don't believe so. The bare wire in type SE cable is rated for use as a neutral conductor so it was approved for this use. That was the point I was trying to make with my previous post. I have read many comments in forums about why the 4th (neutral) wire is now required to be installed for range and dryer receptacles. A neutral wire has always been required but now a 4th wire (equipment ground) is also required.


[This message has been edited by caselec (edited 05-09-2003).]


Curt Swartz

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