120/240 outlet

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We did an apartment complex where those were installed at the through the wall rough in for a future window type AC. They were fed from the 240 volt electric heat circuit that served the electric baseboard heat installed on the wall below the AC rough in.
 
Our schools used to have them in the hallways. Scrubbers and some cleaning equipment was 208 and still needed 120 for vacuums and other equipment. Now everything is battery.
 
I have taken a 5-20 and twisted the prong to fit a 5-15P.

I can see someone bending prongs to fit the top…😆
 
K8MHZ said:
I was under the impression that 'dual voltage' receptacles were not quite NEC approved.

I get this from 406.8 Noninterchangability
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These are duplex devices with 6-20R and 5-20R for the two bits.

Not the strange ones with two 'T' holes that fit 5 or 6 pattern plugs.

Jon
 
Dennis Alwon said:
He could use a 3 pole breaker, NO?
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I don't think it would be needed, but a 2 pole definitely. You could wire like a MWBC but both ungrounded conductors landing on the 240 terminals and the jumper feeding the ungrounded side of the 120 and the grounded conductor landing on the 120 neutral terminal.
Never seen one but seems interesting. Not sure of the application.
 
Fred B said:
I don't think it would be needed, but a 2 pole definitely. You could wire like a MWBC but both ungrounded conductors landing on the 240 terminals and the jumper feeding the ungrounded side of the 120 and the grounded conductor landing on the 120 neutral terminal.
Never seen one but seems interesting. Not sure of the application.
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Then they wouldn't have separate circuit on the 240 and 120. Sounds like you are jumping one hot leg.
 
Dennis Alwon said:
Then they wouldn't have separate circuit on the 240 and 120. Sounds like you are jumping one hot leg.
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Don't see it needed but would regardless have to have all circuits disconnected simultaneously. If you were to look at side views of the referenced receptacle it has 3 brass and one silver screws, the one side has 2 brass and a common jumped bridge, and the other side has a brass and silver non bridged terminals one hot one neutral. But if you were to want to have totally seperate Circuits it would have to be handle tied. But kind of would defeat the shortcut this device would give.
 
Dennis Alwon said:
Then they wouldn't have separate circuit on the 240 and 120. Sounds like you are jumping one hot leg.
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That is exactly how I would do it.

This would be a multi-outlet multi-wire branch circuit. No different than having multiple receptacles on each 'half' of an ordinary MWBC, but some of the receptacles are H-H rather than H-N.

-Jon
 
Hv&Lv said:
I have taken a 5-20 and twisted the prong to fit a 5-15P.

I can see someone bending prongs to fit the top…😆
Click to expand...
>I can see someone bending prongs to fit the top
The moment they turn on the 120V device and smoke comes out of it they would get an education on not messing with electrical stuff. The more expensive the device that goes up in smoke is, the better they will learn the lesson.
 
How about this little guy

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5835-W

www.leviton.com www.leviton.com

When I was in London, my hotel bathroom has a recep like this. But my understanding of that particular device was that it had a transformer built in. It wouldn’t power my wife’s hairdryer but it would charge my beard trimmer. It’s called a shaver receptacle. But the one I linked is hardwired for 120 or 240.


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