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Circle F NEMA 1-15P to 5-15R Adaptor

Circle F NEMA 1-15P to 5-15R Adaptor

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Found this connected to an old shoplight. I think the idea behind this was people who lived in older homes with no ground wiring could "safely" use grounded appliances by plugging one of these in and wiring the ground wire to ground. But i assume most people may not do it properly, leaving the item ungrounded.

20190511_201525~2[1].jpg 20190511_185740[1].jpg 20190411_223224[1].jpg 20190308_205702.jpg

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Filename:20190511_201525~2[1].jpg
Album name:High Intensity / Parts
Keywords:Miscellaneous
File Size:675 KB
Date added:May 11, 2019
Dimensions:2464 x 2162 pixels
Displayed:41 times
Date Time:2019:05:11 20:15:49
DateTime Original:2019:05:11 20:15:25
Exposure Bias:0 EV
Exposure Time:1/30 sec
FNumber:f 2.2
Flash:Compulsory Flash
Focal length:3.701 mm
ISO:100
Make:LG Electronics
Model:LM-X210(G)
White Balance:0
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Cole D.
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123 V 60 CPS


Dk944Mr-jX4jbnoUUj7xAw
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May 11, 2019 at 09:41 PM Author: Cole D.
Yeah the F inside the circle means Circle F. You're right on what these were for. The green wire is supposed to be connected to the cover plate screw, because typically that contacts the strap which mounts to the outlet box. But if the box itself isn't grounded (which it often wasn't) then these aren't much use. And a lot of these seem to have had the ground wire cut off, so later versions seem to use a tab instead of a wire.
icefoglights
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ITT Low Pressure Sodium NEMA


GoL
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May 11, 2019 at 11:00 PM Author: icefoglights
Nice thing about having the wire is that it can be used in the bottom outlet, where the tabbed kind can only go in the top.

01010010 01101111 01100010 01100101 01110010 01110100

Men of God
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jiachao.wei.71 chao990613
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May 12, 2019 at 10:51 AM Author: Men of God
这样的转换插头日本还在用…

我不会英文,所以我用中文,请你们用翻译网站翻译我打的字!

I can't in English, so I in Chinese, please use the translation website to translate my words!

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GoL PeterYachymczyk UCYBAif_ag4v8nIcCU3VAmag
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May 12, 2019 at 06:18 PM Author: LampLover

Yeah the F inside the circle means Circle F. You're right on what these were for. The green wire is supposed to be connected to the cover plate screw, because typically that contacts the strap which mounts to the outlet box. But if the box itself isn't grounded (which it often wasn't) then these aren't much use. And a lot of these seem to have had the ground wire cut off, so later versions seem to use a tab instead of a wire.


If I remember correctly the reason for the tab on the newer versions was a safety reason as most people left the wire unconnected, therefore hanging loose where it could contact the hot or neutral prong (If the plug was not fully inserted) and energize the metal frame of the appliance. Thus a safety hazard which is why the newer ones have the tab instead of the wire, I do have one however that has a screw for the ground wire

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