2 prong metal drills

Merry Christmas
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drcampbell said:
Lots of different designs could have been better.
The German Shuko ("Schutzen Kontakt" ... protective) has a recessed earth conductor -- there isn't anything that can be removed, nor any reason to. It's also completely finger safe - the plug is completely recessed inside the receptacle before the pins make contact.

View attachment 2555936
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That is a bit like the shell ground on some twist lock plugs. First make, last break.
 
drcampbell said:
Lots of different designs could have been better.
The German Shuko ("Schutzen Kontakt" ... protective) has a recessed earth conductor -- there isn't anything that can be removed, nor any reason to. It's also completely finger safe - the plug is completely recessed inside the receptacle before the pins make contact.

View attachment 2555936
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I have those throughout my home, they are great (y)

https://imgur.com/qHmVrem


https://imgur.com/urtCRVz


However, this was supposed to be the dominant plug in the US, ahead of its time with grounding:


https://patentimages.storage.googleapis.com/48/f8/94/7639ad56b7c68d/US1179728.pdf


1616870548517.png

1616870568183.png


These existed for some time, even appearing in prints/older buildings, than for some reason vanished without explanation.
 
jmellc said:
I have seen a very few of these or similar. Can’t recall where.
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Were they the actual non nema type (smaller) or NEMA 10-20r (larger)?




Cooper Wiring Commercial Armored Straight Blade Plug 10-20P 14-10 AWG 3 Pole 3 Wire Boxed - Electric Plugs - Amazon.com

Cooper Wiring Commercial Armored Straight Blade Plug 10-20P 14-10 AWG 3 Pole 3 Wire Boxed - Electric Plugs - Amazon.com
www.amazon.com
 
mbrooke said:
Were they the actual non nema type (smaller) or NEMA 10-20r (larger)?




Cooper Wiring Commercial Armored Straight Blade Plug 10-20P 14-10 AWG 3 Pole 3 Wire Boxed - Electric Plugs - Amazon.com

Cooper Wiring Commercial Armored Straight Blade Plug 10-20P 14-10 AWG 3 Pole 3 Wire Boxed - Electric Plugs - Amazon.com
www.amazon.com
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Checking back to a pic I posted sometime before. It was a combo device, 120 & 250. The 250 may have been close.
 
mbrooke said:
If I'm correct the 15 amp version was dual rated 15 amps 125volts 10 amps 250 volts.
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Can’t find my post but here is the pic. Yes, 15A, 125. I can’t see other but I think it was 10A, 250. Sadly, I lost the device.
 

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jmellc said:
Can’t find my post but here is the pic. Yes, 15A, 125. I can’t see other but I think it was 10A, 250. Sadly, I lost the device.
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Bro! Thats just pure awesome!

Yes, the plug on the top is as common as NEMA 5-15 in most alternate realities. Its whats missing in most NEMA charts:


1616899785966.png

Ideally the "W" slot becomes the ground and rows #10 and #18 are dominant in number.
 
mbrooke said:
View attachment 2555947
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I inherited some of those from my grandfather, with matching plugs. I installed one in the bed of my '86 pickup behind a weatherproof cover; used it to power the lights on the cap and a 12-volt trouble light; assuring that the trouble light could never be plugged into a 120-volt receptacle. I probably still have the rest of them.

And now, decades later, I learn what they are.
 
drcampbell said:
I inherited some of those from my grandfather, with matching plugs. I installed one in the bed of my '86 pickup behind a weatherproof cover; used it to power the lights on the cap and a 12-volt trouble light; assuring that the trouble light could never be plugged into a 120-volt receptacle. I probably still have the rest of them.

And now, decades later, I learn what they are.
Click to expand...

Do you still have them?

They existed, and were used in a variety of odd locations before becoming totally uncommon. Its a shame, the ground should be like the phases in construction, grip and continuity.
 
drcampbell said:
I inherited some of those from my grandfather, with matching plugs. I installed one in the bed of my '86 pickup behind a weatherproof cover; used it to power the lights on the cap and a 12-volt trouble light; assuring that the trouble light could never be plugged into a 120-volt receptacle. I probably still have the rest of them.

And now, decades later, I learn what they are.
Click to expand...


Spotted today on Reddit, was used for 120 volts:

https://www.reddit.com/r/electricians/comments/mptrko
 
mbrooke said:
So how were all those drills livening up?
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One way is drilling into a live conductor. Even had that happen to me before while drilling with a cordless drill in recent years. Most of drill case is insulated but the bit and at least some parts of the chuck are not.
 
kwired said:
One way is drilling into a live conductor. Even had that happen to me before while drilling with a cordless drill in recent years. Most of drill case is insulated but the bit and at least some parts of the chuck are not.
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Right, but I don't think that is behind most of the statistics.
 
kwired said:
In an electrocution situation wouldn't they have investigated what actually failed most the time? You maybe not reading the right reports to find that information?
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My understanding is the insulation failed internally energizing the metal case.
 
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