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Old 02-08-2012, 12:07 PM   #1
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Nurpolian outlet history?


I just moved into an old apartment and found some interesting looking outlets that I've never seen anything like. I'm trying to figure out more about the history of the house and it's age so I'm wondering if anyone knows more about when these types of outlets were used? I did some research and found out they are called "Nurpolian tandem and parallel receptacle". All of the information on the internet about it is very brief and seems to be copy and pasted around every blog so I was wondering if anyone knew anything more about it and it's age?
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Old 02-08-2012, 06:43 PM   #2
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Nurpolian outlet history?


Those are the old dual-rated receptacles, which were used for both 120 and 240 Volt applications.

Maybe 100 years old.

The problems developed when someone actually used one for a 240 Volt application, and then someone else accidentally plugged in a 120 Volt appliance -- which resulted in the 120 Volt device getting fried rather quickly.

To avoid such fiascos nowadays, standardized NEMA configurations are used.

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Old 02-08-2012, 10:49 PM   #3
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Nurpolian outlet history?


Ive never seen those
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