http://www.leviton.com/OA_HTML/ibeCCtpItmDspRte.jsp?sitex=10026:22372:US&item=4206

Still allowed by code. There are many two wire systems out there. Like my house.

Interesting .... while my home had those until recently, the two-prong receps carried / ordered by the parts house had the more 'conventional' pair of slots.

Naturally, my home is now all three-prong receptacles. I just knew that someday I'd find a good use for GFCI's and Wiremold extension boxes

These are the ones with the "T" slot on both sides
I am not sure why you would need that or how you keep the 240v plugs out.

Yup .... my place HAD the 'T' slots.

I think that was the point of the design - to accept as many different plugs as possible. Remember, they come from a time when there was no NEMA, let alone standard plug patterns. I've even seen a variation that was not polarized.

Yah, it makes me wonder why they are still making something like that.[with the tandem slots] What is the use? 240 plugs? New ones have a grounding prong. You'll either need a side cutter or a hammer to make that fit... I don't think I have seen an old 2 prong tandem plug for sale. I have seen some old 2 prong plugs with one blade tandem and the other straight, and it was rated 15 A 125 V. It wasn't terribly old either.I wonder if this receptacle is dual rated like the old ones were, something like 15 A 125 V and 10 A 250 V. Note: Non UL. it says. Perhaps it is manufactured for other countries such as Mexico or some South American countries that do not have listing requirements?

I seen this pic posted on another board, and thought (Or hoped) someone photoshopped it...

Leviton still has stock.

Possibly for people who care about the aesthetic of having matching outlets, rather than functionality/safety?

Interesting how the slots are not centered (vertically) on each outlet, but are in the same position as they would be for a grounding-type receptacle. I presume that the insides are the same as a 5-15/5-20/6-15/6-20 but they just use a different front.

I agree, Paul. I'm sure that the insides are the same as a standard 5320 grounding receptacle with a different face. The original ones were centered for sure.

Well, not quite. The 5320 uses less expensive contact assemblies that do not accept t-blades on either side. This animal is likely closer in construction to the commercial receptacles where they do have what they call triple-wipe contacts for t-blades. I'm not sure about the hot side, but on the neutral side the commercial 15 and 20 amp devices both have a triple-wipe contact to simply planning, fabrication, stocking and assembly.

Yep. Now that you brought that to my attention, the 5320 wouldn't have accommodations for both types of blades. I was thinking that only the vertical slots are active and the others are for show, to "match" others in an historic home for example.

Now that I think about it, that probably wouldn't make sense. Still, there's little doubt that Leviton is designing these things to use as many components from their mainstream devices as possible. I just can't imagine who would be using them and I can't imagine that Leviton is making much money by still producing them either.

I'm a bit out of touch these days, but the big L used to have a very successful export business to Central and South America. Perhaps there is some use there. The position of the blade slots suggest that this device's cover is a mold changeover from the cover for the 223 (the polarized non-grounded replacement receptacle).

I did a little digging. the 5000-I is not listed by UL according to Leviton paper catalog (I am old fashion) It is for replacement purposes only. (NEC 406.3). Can it still be used? I know the answer but Im board so I will stir the pot to see what comes to the top.

This is a good little research project.

Can it or can it not be used in the US? Please submit your reference with your answer. In other words, do not guess at it, guessing on the job can get someone hurt.

Easy answer: anything can "legally" be used in the US... with AHJ permission!

Despite popular opinion, there is no law requiring UL listings in the US. Per NEC, any listing agency recognized by the AHJ is acceptable to meet that requirement. CE, CSA, MIL, etc, are often OK, especially if there is no UL-listed substitute for the application. Is this listed by anyone else? In the end, it all comes down to what the AHJ will allow.