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#151838 - 05/11/03 10:13 PM 4 Prong Duplex Receptacle  
Admin  Offline

Joined: Oct 2000
Posts: 3,447
[Linked Image]
I found this in a box of stuff when we cleaned out my grandma's house. (the one on the left. Also the newer one in the middle also came from grandma's).


Tools for Electricians:

#151839 - 05/15/03 07:56 AM Re: 4 Prong Duplex Receptacle  
pauluk  Offline
Joined: Aug 2001
Posts: 7,520
Norfolk, England
Interesting. I've wondered about those receptacles with dual T-slots before.

When exactly did it become standard for the parallel blades (5-15) to be 120V and the in-line blades (6-15) to be 240V only?

#151840 - 05/21/03 04:16 PM Re: 4 Prong Duplex Receptacle  
desoto  Offline
Joined: Oct 2001
Posts: 13
Marion, NC USA
Here is my addition to this topic, this is a Hubbell with the matching plate!

[Linked Image]

[This message has been edited by Webmaster (edited 05-21-2003).]

#151841 - 05/21/03 04:58 PM Re: 4 Prong Duplex Receptacle  
wa2ise  Offline
Joined: Nov 2002
Posts: 782
Oradell NJ USA
Desoto, do you have any extras of that cover plate you'd let go? My mom's house uses that style, and would like to have extras for new outlets or replacements.

#151842 - 05/21/03 09:23 PM Re: 4 Prong Duplex Receptacle  
desoto  Offline
Joined: Oct 2001
Posts: 13
Marion, NC USA
I will have to check around to see what I have. Since getting interested in this network and board it has sparked interest in my older electrical stuff that I have accumulated throughout the years! I even have lightbulbs from the 20's;original Mazdas!! I will scrounge around and get back to you on this!
Please visit my websites! and

[This message has been edited by desoto (edited 05-21-2003).]

#151843 - 05/23/03 12:09 PM Re: 4 Prong Duplex Receptacle  
SvenNYC  Offline
Joined: Aug 2002
Posts: 1,691
New York City come nobody puts little designs like that on the socket faces anymore???

They're just plain plastic now. Boring.

WA2ISE, can't tell you how many of those things I've cracked over the years by accident (and then replaced with metal plates after cursing a bit).

I've seen them a lot in Montreal -- in older buildings....

The ones I've seen are always covered in paint. They're sort of pretty looking. Wonder why they stopped making them....

#151844 - 10/28/06 01:15 PM Re: 4 Prong Duplex Receptacle  
Dawg  Offline
Joined: Jan 2005
Posts: 59
Hey....I'm also curious about the t-slot receptacle as well as the 4 prong holed receptacles....I'd guess the 4 prongs were the fore runners to the t slots?

If you look it looks like on the 4 prongs the two tandem blades are very similar to the standard 6-15 receptacle minus the ground prong...or the horizontal slots on the t-slot receptacle.

I'd like to know what the tandem blade plugs were used on? It looks like it was obviously a 240 volt power source with a 10-15 amp max draw load.

Anyone know?

#151845 - 11/01/06 09:52 PM Re: 4 Prong Duplex Receptacle  
EASports  Offline
Junior Member
Joined: Oct 2006
Posts: 4
Hutchinson, KS

My workplace actually has some of the four-prong and double T outlets installed, though none of them are actually used for anything.

#151846 - 11/02/06 04:04 PM Re: 4 Prong Duplex Receptacle  
cschow  Offline
Joined: Sep 2006
Posts: 41
Boise, ID, USA
I also wonder why those plates aren't made anymore. They are sure pretty and they can't be more costly to make than the plain cover plates once the mold is set up.

I have some old decorative plates, but these have a neat design in the corners. Also have some with a gothic or arts & crafts look on the border. they are old brown plates from the 30's, before ivory came out.

My house was built in '35 and has 2 of the original single outlets in 2 bedrooms with the corner scrollwork in it. House also has 4 original pushbuttons also.

#151847 - 11/02/06 08:20 PM Re: 4 Prong Duplex Receptacle  
classicsat  Offline
Joined: Nov 2002
Posts: 456
Simply, it is setting up the mould that costs,especially for that intricacy.

Plus there would be costs to the factory in keeping that line separate (most of the production would still be for the smooth plate), and in the supply houses in stocking them.

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