Knockout Plugs

Merry Christmas
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480sparky said:
Don't temp him! Marc has enough tools already! :grin:
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My wife is a nurse too. She already has the staple remover gadget. It comes in a little plastic tear-apart baggie, and the tool is supposed to be disposed of between uses. She's generally the one that gives me shots, and removes whatever stitches and staples I happen to have at the time. Consequently, she informs me that they havn't shaved scalps for staples and stitches in years and years.

How did this get mixed in a knockout plug thread anyhow? I guess it started with Roy Overhill, or whatever his name is.
 
They still do a little shaving around here, sure makes it easier to get them out. You can throw the stainless steel version of the staple remover in the autoclave and re-use it. :)

Yes, you started it!!!
 
mdshunk said:
How did this get mixed in a knockout plug thread anyhow? I guess it started with Roy Overhill, or whatever his name is.
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How bout a "knocked silly seal"

Only 2 staples , go back and try harder. :grin:
 
mdshunk said:
My wife is a nurse too. She already has the staple remover gadget. It comes in a little plastic tear-apart baggie, and the tool is supposed to be disposed of between uses. She's generally the one that gives me shots, and removes whatever stitches and staples I happen to have at the time. Consequently, she informs me that they havn't shaved scalps for staples and stitches in years and years.
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So do you get a discount on your health insurance??:grin:
 
Sorry, I took this thread into the "It aint Friday unless you have nearly amputated a limb" contest. (No pun intended 480 - it's what I say every time I am applying electrical tape to my hand on any day of the week...) That said I am no delicate flower - like I assume many of us have 1/8"+ callus's and not shunned by stinging pains...

I also equate most of out work is metel working of enclosures of some kind or another.....
 
jerm said:
... told him that knockout seals have to have the smooth part on the inside of a junction box, so that the 'teeth' are on the outside. He said it's because of a code (the apprentice couldn't give the article number, go figure) that says something about sharp objects inside a junction box, and how they'd have the potential to cut into a wire.
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And the teeth would be sharper or stick into the box further than a nipple or threaded fitting? Or the plug with the threaded post and wingnut? I don't think so!!!
 
As I add the 68th post to this thread I must say I am amazed that this thread has gone this far. We have nothing better to do it seems.
 
I did look up in the UL database, and there are 3 companies that make UL listed metallic knockout plugs. 2 of them are the weatherproof variety that thread into bell boxes, and the other one is the type with the bar and the wingnut for the inside. There are many nonmetallic knockout seals that are UL listed. The majority of knockout seals of any variety that I managed to find are not UL listed by any means. (not that this would stop me from using them). I just happen to prefer the plastic ones that click in, and they also happen to be UL listed, so I guess I'm good.
 
I don't have time to look it up now, but the inspector might have been refering to the code section about not having the mounting screws inside of the box.

But I always installed KO seals from the outside too.
 
Ed Carr said:
I definitely would not put one of those toothed plugs on the inside of a cabinet where some dummy could pop it right onto a busbar!
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I ran into that setup. The original installer had taken too many KO's out of the top of a flush mount panel in a commercial kitchen we we were working in. We needed to fish some BX down the wall into the panel. I took the cover off for a look-see and there was a KO seal installed from the inside right up top where I needed a hole. When I barely touched it, it fell right out. This would have fallen into the main breaker and caused a phase to phase short on the line side of the main. Wow! Talk about a time bomb ready to go off. Someone banging on the wall might have caused that KO seal to fall out. Fireworks were averted that day.
 
yanici said:
I ran into that setup. The original installer had taken too many KO's out of the top of a flush mount panel in a commercial kitchen we we were working in. We needed to fish some BX down the wall into the panel. I took the cover off for a look-see and there was a KO seal installed from the inside right up top where I needed a hole. When I barely touched it, it fell right out. This would have fallen into the main breaker and caused a phase to phase short on the line side of the main. Wow! Talk about a time bomb ready to go off. Someone banging on the wall might have caused that KO seal to fall out. Fireworks were averted that day.
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That's far beyond scary!
 
LMAO this has gone long way so I thought I would throw my 2 cents in..depends on the situation whether I bend all of the tabs flat..I sure do hate removing them after wards though..I have learned a trick over the years to installing them..you take your pliers and squeeze them just lightly and then you insert them into the box take a screw driver and force the tabs out and wallah no fuss no mess..I also like the plastic ones as well I use them in not so obvious places for speed and ease of installation..if the box is subject to the elements of force or other human factors that I see as imminent implications from..I will use metal ones and bend them over..so if you work on one of my jobs and you find a metal box in ceiling with plastic knockout seal in it oops sorry about the violation but at-least it is sealed..
 
[ bumpos own thread...:) ]

cschmid said:
this has gone long way
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It is odd the things that get us started. I've never authored a thread with more than 7 posts, and now this one is on #78. Wow. :)
 
jerm said:
It is odd the things that get us started. I've never authored a thread with more than 7 posts, and now this one is on #78. Wow. :)
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And this one is only about KO seals. Imagine something controversial like "Is a switch an outlet?" :D :D :D
 
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