Do they make wall receptacles where one is non-polarised and the other poalrised?


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On Thu, 6 Apr 2023 19:40:28 -0000 (UTC), vjp2.at@at.BioStrategist.dot.dot.com wrote:

Do they make wall receptacles where one is non-polarised and the other poalrised?

You can make one.
Just plug one of the two ground holes with some contrasting
colored caulk -- so the next fool knows it was done on purpose.

WTH? Sure sounds like a troll.

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In <slrnu2ug8h.s.trepidation@vps.jonz.net> by Allodoxaphobia <trepidation@example.net> on Thu, 06 Apr 2023 18:00:49 we perused:
*+-On Thu, 6 Apr 2023 19:40:28 -0000 (UTC), vjp2.at@at.BioStrategist.dot.dot.com wrote:

Do they make wall receptacles where one is non-polarised and the other poalrised?

*+-You can make one.
*+-Just plug one of the two ground holes with some contrasting
*+-colored caulk -- so the next fool knows it was done on purpose.

*+-WTH? Sure sounds like a troll.

The old outlets had both prongs the same width

now one is wider

Nothing about the ground

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vjp2.at@at.biostrategist.dot.dot.com wrote:

In <slrnu2ug8h.s.trepidation@vps.jonz.net> by Allodoxaphobia <trepidation@example.net> on Thu, 06 Apr 2023 18:00:49 we perused:
The old outlets had both prongs the same width

now one is wider

Yes, that's how the 'polarized' plugs work. By also making one plug
tang wider you can only insert a polarized plug into a proper polarized receptacle.

If you can plug a polarized plug into a non-polarized receptacle, then
you can defeat the safety advantage offered by the polarized plugs.

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vjp2.at@at.biostrategist.dot.dot.com wrote:

Do they make wall receptacles where one is non-polarised and the other poalrised?

No. Most likely because doing so would likely be an electrical code violationn. I believe (at least for the US) the electrical code requires
all new and upgraded receptacles to be polarized.

Just install a polarized receptacle. It is 100% backwards compatible with non-polarized plugs, with the added advantage of also being 100% forward compatible with all polarized plugs.

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If you can plug a polarized plug into a non-polarized receptacle, then
you can defeat the safety advantage offered by the polarized plugs.

NEMA receptacles (1-15P) for polarized plugs have been around since the late 1920s when the concept of 120/240 AC systems was fully described. We have them in some old wiring in our house. NP (1-15) receptacles exist for situations where the polarity of
the receptacle cannot be predicted - such as DC circuits, and 'back-panel' receptacles in devices such are clock-radios that might be plugged into the wall either way. Many more contemporary audio devices used NP receptacles in the back (especially tube
stuff) rather than polarized as they sometimes hummed less if plugged in one way rather than another.

Polarized *receptacles* offer 'safety advantages' only if they are correctly wired.
Polarized *plugs* offer safety advantages again, only if they are properly wired and the device is functioning properly.

These distinctions are lost on our Non-North American friends. After all, it was all pretty much invented here, and the rest of the world benefitted by not having to make the same mistakes we did in the beginning. Nor are they living with 110 year-old
wiring as we are (1913). It is perfectly fine, by the way, and called "knob and tube". It has also been inspected by our insurance company and passed without a peep.

Peter Wieck
Melrose Park, PA

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Wow, thank you. Exactly the answer I wanted.


*+- NEMA receptacles (1-15P) for polarized plugs have been around since the late 1920s when the concept of 120/240 AC systems was fully described. We have them in some old wiring in our house. NP (1-15) receptacles exist for situations where the polarity
of the receptacle cannot be predicted - such as DC circuits, and 'back-panel' receptacles in devices such are clock-radios that might be plugged into the wall either way. Many more contemporary audio devices used NP receptacles in the back (especially
tube stuff) rather than polarized as they sometimes hummed less if plugged in one way rather than another.

*+-Polarized *receptacles* offer 'safety advantages' only if they are correctly wired.
*+-Polarized *plugs* offer safety advantages again, only if they are properly wired and the device is functioning properly.

*+-These distinctions are lost on our Non-North American friends. After all, it was all pretty much invented here, and the rest of the world benefitted by not having to make the same mistakes we did in the beginning. Nor are they living with 110 year-old
wiring as we are (1913). It is perfectly fine, by the way, and called "knob and tube". It has also been inspected by our insurance company and passed without a peep.

*+-Peter Wieck
*+-Melrose Park, PA

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