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Old 25th Sep 2013, 12:03 am   #215
G3gener
Retired Dormant Member
 
Join Date: Oct 2011
Location: San Francisco, California, USA.
Posts: 6
Default Re: Another unusual plug and some other questions

Thanks. I'm glad you liked it. This catalog also gave me a clear look into early American plug technology. I was told appliances could either be hard-wired or fitted with an Edison base. There might have been other plug-socket schemes,but Hubbell's won out.

It's interesting that he started with a tandem blade design, then for some odd reason settled on the parallel blade (NEMA 1-15 or 125V/15A) design that we have to this day for household use.

The tandem design was not discontinued,but assigned as a NEMA 2-15 or a 250V/15A plug.

For a while 120V outlets were designed to take both. Here is a 1940s era socket in my bathroom.
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