No End to Junk

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tthh said:
It was definitely the flue pipe from the gas furnace...in the room right next to my kid's bedroom. You can see the double wall pipe B-vent pipe the dislodged piece is going in to.
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Yes I can see that, now that I look more closely at the picture. Crazy.
 
I once lived in a house where the furnace closet was very tight and so they had run single wall duct through the ceiling/flat roof instead of double wall. Nicely pyrolized wood all around it. So I attached a large sheet of aluminum to the inside of the hole in the roof.
Most dangerous installation I ever encountered.
100% not code.
 
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Do believe the clearance on double wall is 1/2" to combustibles and single wall 6" clearance to combustibles. However I'm a electrician and I still trying to understand the NEC.
 
jmellc said:
Found this recently. Red wire had been cut short & buried in the connector. It was live. No end to the sloppy & dangerous junk. I’ll be glad when I can retire. Gotta hang in another 3 years at least.
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Beat you to retiring. Would tell contractor & homeowners that I have an agreement with Doctors. I do not work on abortions and they do not perform any electrical work. A contractor wanted a quick fix on a old super market. To turn luminaries on you had to tap drop ceiling a few times. Went up to the ceiling and found at least 20 points where they spliced BX cable w/o any boxes. Told him they only quick fix was to tear it down. Told him that any qualified electrician would only take on a job like this is to pull every wire out and start from scratch.
 
LarryFine said:
I don't understand the question. :unsure:

Are you asking why the cover plate has only two holes, or why one is a slot and one is a keyhole?
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Like Wayne stated and Oldsparky commented on, the cover is stamped “under side”.
Wonder why??
I have never noticed that before.. I‘m looking for some covers now to see if mine are stamped.
 
I don't remember ever seeing a cover so marked either. Every 4-11/16" box I recall, and every picture I can find now, has four cover-screw tabs, so a flat cover can be used in either orientation.

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Added: Even cover manufacturers don't agree one one standard:

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The UL stamp seems to be placed on the inside face (in other words "under side") of box covers. Which side goes toward the box is obvious on many box covers but not on flat covers, and so they mark it "Under Side".
This post on Electrician Talk by Chris Kennedy mentions it's done that way so that the UL stamp does not get painted over, which makes sense:
https://www.electriciantalk.com/threads/who-knew-1900-4-sq-box-cover.50692/#post-937201

I suppose they could place a UL stamp on both sides, but then they'd might have to pay UL an extra fee for that! :rolleyes:
 
Now that I look at the first cover the Larry posted, it has a UL stamp on the front of it. I wonder if it also has one on the other side.
 
If you install the under side outward, tightening the screws forces the cover open unless you hold it in. Sometimes anyway.
 
synchro said:
The UL stamp seems to be placed on the inside face (in other words "under side") of box covers. Which side goes toward the box is obvious on many box covers but not on flat covers, and so they mark it "Under Side".
This post on Electrician Talk by Chris Kennedy mentions it's done that way so that the UL stamp does not get painted over, which makes sense:
https://www.electriciantalk.com/threads/who-knew-1900-4-sq-box-cover.50692/#post-937201

I suppose they could place a UL stamp on both sides, but then they'd might have to pay UL an extra fee for that! :rolleyes:
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We should start checking for UL marks on the nails attached to a nail up box.
 
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