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#25418 - 05/07/03 12:38 PM Dryer - 3 or 4 prong
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: 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.
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#25419 - 05/07/03 12:47 PM Re: Dryer - 3 or 4 prong
ThinkGood Offline
Member

Registered: 08/07/02
Posts: 1084
Loc: Milwaukee, WI

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#25420 - 05/07/03 04:36 PM Re: Dryer - 3 or 4 prong
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
Al,

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

Bill

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#25421 - 05/07/03 07:42 PM Re: Dryer - 3 or 4 prong
golf junkie Offline
Member

Registered: 04/22/01
Posts: 511
Loc: 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

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#25422 - 05/08/03 08:17 AM Re: Dryer - 3 or 4 prong
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: 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.
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#25423 - 05/08/03 03:13 PM Re: Dryer - 3 or 4 prong
caselec Offline
Member

Registered: 04/14/02
Posts: 557
Loc: 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
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Curt Swartz

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#25424 - 05/08/03 03:45 PM Re: Dryer - 3 or 4 prong
iwire Offline
Moderator

Registered: 01/05/03
Posts: 4343
Loc: 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.
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Bob Badger
Construction & Maintenance Electrician
Massachusetts

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#25425 - 05/08/03 05:11 PM Re: Dryer - 3 or 4 prong
aldav53 Offline
Member

Registered: 08/22/01
Posts: 547
Loc: Chandler, AZ USA
Yes the 10-2 wire bare were used as grounds but we all know dryers can have 120v timers etc.
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#25426 - 05/08/03 05:54 PM Re: Dryer - 3 or 4 prong
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: 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

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#25427 - 05/08/03 06:10 PM Re: Dryer - 3 or 4 prong
caselec Offline
Member

Registered: 04/14/02
Posts: 557
Loc: 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).]
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