[Boatanchors] Article on changing from 2 to 3 wire power cords

David Rossetti drossetti at comcast.net
Wed Aug 7 13:29:17 EDT 2019

Just as a data point, the house I grew up in was built around 1952 and used the two equally sized outlets. Seems the addition, added on in or about 1961 used the three pronged outlets. I also remember buying lamps in 1977 that had two equally sized prongs, something you won't see today.

Dave Rossetti

Sent from my Verizon Motorola Droid
On Aug 7, 2019 11:42 AM, LARRY PICARD <lmpicard at rogers.com> wrote:
> I live in an older home.  
> Before the knob and tube wiring was replaced a number of years ago, the original electrical outlets had only two slots and they were both the same size.
> Does anyone know when three prong plugs and polarized plugs and their respective receptacles came into use? 
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