Long Post: Seeing Shades of Gray through Red

Status
Not open for further replies.

George Stolz

Moderator
Staff member
Location
Windsor, CO NEC: 2017
Occupation
Service Manager
Before I begin my rant, I need to make it clear that I know I am truly missing something, and that I hope some discussion on this event will clear some items up for me. I know I have done (or allowed) wrong deeds, and need perspective. I wire menial tract homes, never over 2,600 square feet. We are the low bid. I try to do good, but don't despair too much over minor incidents.

Recently, the GC of my primary jobsite called me to let me know that one of my houses failed the trim inspection. When I asked how bad, he said "It's a long list, just a second... Okay, it actually looks like four items, but the second one is really long."

After a confusing verbal description of the notice, I rolled over to the house to make the corrections. The following is what I remember of the notice:

  • Outlet box in island needs grounded
  • Vanity fixtures need to be closed on the backside, either by installing a box or by installing a 4-square cover with a knockout for a fitting for the romex to enter through or something similar
  • Receptacle for microwave needs to be flush with the back of the cabinet
  • Arc Fault breaker for master bedroom doesn't trip

The first item was entirely my fault. I don't remember what circumstances prompted me to forget the bonding screw, but I couldn't believe it until I saw it with my own eyes. I was grateful he caught the mistake. (It's easy to spot the lack of a ground screw, the backside of the box is exposed inside the cabinet.)

The Arc Fault button was jammed, so I replaced the breaker.

The vanity fixtures came with 1/2" knockouts for romex to enter the back of the vanity, and also with a large hole in the center for a junction box behind the light. I didn't originally hang any of the vanities, so I'm not sure of the literature that came with them. I saw what I saw upon removal of the light to make corrections.

In all but one of the vanities, romex entered into the fixture through a 1/2" knockout, and the large hole was unused. My quick and easy solution was merely to pilot the dead-center of the hole, remove the fixture, and attach a pancake box to the back of the fixture. I then re-installed the fixture using the existing anchors in drywall (with factory-supplied mounting 'keyhole style' holes in the backplate of the fixture).

One fixture had romex entering the big hole, unbushed, but the original installer took pains to not damage the drywall behind the fixture. So, the drywall kept the romex from the edge of the backplate of the light. The pancake method worked out fine for this, as well. I agreed with the inspector's decision on this light, and this light alone. IMO, the presence of the 1/2" knockouts in the back of the fixture is evidence that they intended this fixture to serve as it's own junction box.

My question is: Does painted, textured drywall effectively close this large hole, when it's not in use? When using these fixtures, should I plan on always installing a box, or a blank, to close this large hole? Comments?

The microwave receptacle stuck in my craw. I opened the cabinet, looked again at the receptacle, and decided it was going to be a royal pain in the butt to change. I am responsible for every aspect of it's installation; I laid out the house, marked the height of the receptacle, pulled the NM, stripped it out, and later trimmed it.

Unfortunately, being a dummy, I sometimes have memory lapses. For some reason, I installed the box at 74" to the bottom of the box, not 76" like I usually do. I think it has something to do with the trick I use to remember the number: My sister was born in '74, the declaration of independence was written in '76, and for some reason these two numbers jumble themselves in my head. Nevermore.

As a result, the box just barely cleared the bottom of the cabinet. As a result, I had to trim the bottom of the plate to fit. I also had to snap off the (removable) plaster ears on the receptacle, so that it would go in. It completely covered the box opening, and seated against the receptacle face when installed.

At the rough, I had just trimmed a house where the stupid cabinet guys had forgotten to cut out the cabinet for my receptacles. The drywallers love to bury the microwave and disposal as well. So, to ensure that my box would be exposed on the trim, I slid that sucker well outside of the drywall. It stuck out a good 1/2" or better from the cabinet surface, when all was said and done.

Now, the inspector was saying that he wants it flush with the cabinet face.

I put a checkmark next to each item as it was completed, and then drew a short line through the beginning of the third item. I then simply wrote "See 314.20". Nothing else. I was paying particular attention to the second paragraph, which says:
In walls and ceilings constructed of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall be flush with the finished surface or project therefrom.

We move on.

I get a call the next day, from the super's assistant: "I got a weird correction notice here, I thought you might be able to understand? It only says 'See 110.12, 406.5, and I need to see a letter from the manufacturer allowing field trimming of the receptacle coverplate.'"

"What's this about?" He asked.

"I'm having a p***ing contest with the inspector..."

"'Nuff said," he laughed. "But you better give in, the house closes tomorrow."

I spent an hour removing the existing box, cutting the cabinet just perfect, and installing a smart-box, taking pains to get a 1/4" of sheathing into it and installing a new coverplate. As a result of my effort, the insulation that was surrounding the existing box is all but gone. There is a 1/4" or better hole under the box (where the bottom of the box used to be), which is exactly concealed by the coverplate.

  • I feel upset about the fact that the inspector was perfectly willing to trade one violation for another; his interpretation of 110.12 was traded for a blatant 314.21 violation without batting an eye.
  • I am irritated that what I deemed to be an unfortunate but (IMO) forgiveable situation warranted a third trip, in his opinion.
  • I am irritated that originally, I know full well that the trimmed coverplate would have been hunky-dory with the inspector, if I had simply moved the receptacle straight back. His official stance changed when I presented a code that allowed the aspect he originally took issue with.
  • I am irritated that he pried the coverplate away from the receptacle, warping it, so that he could cite 406.5. I can walk through a house with a screwdriver and warp plates all day.

Afterwards, I apologized to the GC for the delay, and decided to never challenge a call from this jurisdiction ever again. I believe it will always prove fruitless.

So there are shades of gray in this story; I welcome all comments from all walks, and that includes any comments about the workmanship of the original installation.
 
George: Did the inspector know thats it's your 3rd year doing this stuff?
I would say that's not bad. Now you know what he wants and you will never ever make that mistake again. :oops:
Forgetaboutit------------ and go out to dinner and have a glass of wine. :D
 
Re: Long Post: Seeing Shades of Gray through Red

georgestolz said:
My question is: Does painted, textured drywall effectively close this large hole, when it's not in use? When using these fixtures, should I plan on always installing a box, or a blank, to close this large hole? Comments?

I would call it a violation. Maybe you can order these w/out the big hole. From the insiude, put a blank cover over the hole and tek it to the pan.

As a result, the box just barely cleared the bottom of the cabinet. As a result, I had to trim the bottom of the plate to fit. I also had to snap off the (removable) plaster ears on the receptacle, so that it would go in. It completely covered the box opening, and seated against the receptacle face when installed

trimming plates is a no-no. I let guys slide on this if the plate covers the edge of the box.

Now, the inspector was saying that he wants it flush with the cabinet face.

I think you were right. Sounds compliant to me. Maybe a technicality if those plastic boxes are only listed for concealed work, but I would not call it.

I get a call the next day, from the super's assistant: "I got a weird correction notice here, I thought you might be able to understand? It only says 'See 110.12, 406.5, and I need to see a letter from the manufacturer allowing field trimming of the receptacle coverplate.'"

"What's this about?" He asked.

"I'm having a p***ing contest with the inspector..."

I think your right here as well. Fun isn't it?? :twisted:

"'Nuff said," he laughed. "But you better give in, the house closes tomorrow."

Afterwards, I apologized to the GC for the delay, and decided to never challenge a call from this jurisdiction ever again. I believe it will always prove fruitless.

It would be interesting to know how he would react to a 4/s with a p-ring projecting from the surface with a handi-box cover on it. Or a surface mount metal box.

Sounds like he was irritated with you, which was wrong on his part.



So there are shades of gray in this story; I welcome all comments from all walks, and that includes any comments about the workmanship of the original installation.
 
What is the intent?

? 314.20: Revised to permit measurement to be made from plaster rings, extension rings, and listed extenders.

The intent is a measurement to the wall surface not"extending past or "project therefrom" the surface.

I believe that this inspector called it right according to the article. Why? Well, listen to the commentary, listed extensions project from buried boxes to the wall surface. Not beyond.

NEC 2005 Commentary

For the 2005 Code, ``plaster ring, extension ring, or listed extender'' was added to make a list of the front faces in addition to just a box. This list of options of possible front surfaces clarifies from where the maximum clearance dimension could be measured.

The terms surface and with a surface of make it clear that the requirements of this section apply only to the construction of the surface of the wall or ceiling, not to the structure or subsurface of the wall or ceiling. Therefore, a wall constructed of wood but sheathed with an outer layer of gypsum board is permitted to contain boxes set back or recessed not more than 1/ 4 in. Using an opposite example, a wall constructed of metal studs but finished with wood panels requires that contained outlet boxes be mounted flush with the combustible finish.
 
Re: Long Post: Seeing Shades of Gray through Red

sandsnow said:
georgestolz said:
My question is: Does painted, textured drywall effectively close this large hole, when it's not in use? When using these fixtures, should I plan on always installing a box, or a blank, to close this large hole? Comments?

I would call it a violation. Maybe you can order these w/out the big hole. From the inside, put a blank cover over the hole and tek it to the pan.

Gmack: then another inspector will ask for a listing to "tek" a cover to the fixture in the field. Plan/layout for a box.

As a result, the box just barely cleared the bottom of the cabinet. As a result, I had to trim the bottom of the plate to fit. I also had to snap off the (removable) plaster ears on the receptacle, so that it would go in. It completely covered the box opening, and seated against the receptacle face when installed

Gmack: We have all "screwed" a measurement. Spend more time with the architectual drawings or hound the GC to give you a "spec". Verify
the wall/cabinet thickness and plan for a "f" up. By others. You must play defense to win. If you have written or planned documentation on a box local and its in the right place. You cant lose.

trimming plates is a no-no. I let guys slide on this if the plate covers the edge of the box.

Gmack: Cite a code article for "no no" please.
 
George, if I understand correctly, you installed a plaster ring that protruded out past the back of the cabinet by 1/2", if this is the case and that is what the inspector based his objection on he is wrong.

Notice the wording that accompanies the following graphic, it covers setback requirements there is nothing wrong with protruding


A plaster ring can be sealed around as easily as a conduit or any other protrusion.

1100285590_2.jpg


Additional text clarifies the setback requirements for plaster rings, extension rings, or listed extender, as well as boxes from combustible surfaces.

Boxes that are installed recessed in walls or ceilings of noncombustible material and having a flush-type cover must be installed so the front edge of the box, plaster ring, extension ring, or listed extender is set back no more than 1/4 in. from the finished surface. In walls or ceilings constructed of wood or other combustible material, boxes must be installed so the front edge of the enclosure, plaster ring, extension ring, or listed extender is flush with, or projects out from, the finished surface. Figures 314-4 and 314-5



Roger
 
When a Box protrudes on me I get out my dremel tool with a sanding wheel and buzz that baby flush to the wall or cabinet face. just make sure you rough in with boxes that will allow you to take off some of the front when one of the guys has a bad day and can't seem to get the depth right. It is a rare case but I have found that this works very well.
 
Around here receptacles mounted within cabinets always get a surface mounted wiremold box. We simply leave the cable sticking out of the wall and the cabinet guys cut out a hole leaving the cable in the cabinet. At the trim out a surface mounted box, receptacle and cover plate are installed. Done. No height problems or holes being cut too big or too small in the cabinet. Eliminates a lot of potential problems, especially the one that George mentioned.
 
Gmack, I did read the article, you should do the same. :lol:

314.20 In Wall or Ceiling
In walls or ceilings with a surface of concrete, tile, gypsum, plaster, or other noncombustible material, boxes employing a flush-type cover or faceplate shall be installed so that the front edge of the box, plaster ring, extension ring, or listed extender will not be set back of the finished surface more than 6 mm ( 1/ 4 in.).


Please tell me where it says shall not protrude in that part of the article.

Now looking at the combustible part of the article,

In walls and ceilings constructed of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall be flush with the finished surface or project therefrom.
this specifically says "flush or project therefrom" but this would not mean that "project therefrom" would be prohibited from noncombustible surfaces.

Please explain in your own words why you would think it would be necessary to prohibit a box or extender from protruding through a noncombustible surface?

There are a good number of semiflush (half in half out) Fire Alarm, Med Gas, Speaker, etc... installations in sheetrock, Simplex hinged cover panels are an example.


Roger
 
roger said:
George, if I understand correctly, you installed a plaster ring that protruded out past the back of the cabinet by 1/2"...
No, it was the original box (an Allied single-gang nail-on) that protruded from the cabinet face. But otherwise, yes, you're correct in your visualization of the installation.

bikeindy said:
When a Box protrudes on me I get out my dremel tool with a sanding wheel and buzz that baby flush to the wall or cabinet face.
The box is listed and marked with it's volume from the factory - wouldn't grinding the face off be similar to me trimming the coverplate? ;)

sandsnow said:
Trimming plates is a no-no. I let guys slide on this if the plate covers the edge of the box.
Okay. I wondered about the industry attitude on this, because it's done regularly in the area I work in. (At least, as regularly as a goof next to a door or inside a cabinet happens.) I had always viewed it as a dismal but useful option, but I guess that view is incorrect.

I did actually fire off an e-mail to Cooper about this aspect, because the listing merely says that the UL can't comment about field modifications they don't see. They don't prohibit it, they just wash their hands of it.

sandsnow said:
I would call it a violation. Maybe you can order these w/out the big hole. From the inside, put a blank cover over the hole and tek it to the pan.
Citing 110.12(A), or something else? Does 110.12(A) really apply to this predicament? It's not a cable or raceway opening; it's an opening for use on a outlet box. That might sound feeble, I'm just throwing that out there for argument's sake.

I don't order the fixtures, they're customer supplied. Why would they provide both 1/2" knockouts and a outlet box hole? That doesn't make sense to me. :?

fc said:
George: Did the inspector know thats it's your 3rd year doing this stuff?
Yes, I have sent him a link to this forum in the past, and here I make no secret of my lack of experience. :)

Trevor, that sounds like a good idea. Should I have any more problems along these lines (which I don't believe I will), then I might start doing just that. It would make for an even cleaner look than being recessed, as often times the cabinet guys butcher the back of the cabinet, when the box is flush with the drywall (when I intend to use a spark ring.) Their butchery is another reason why I didn't sweat the original somewhat goofy look of the receptacle, because I'd actually seen worse. :shock: :lol:

Gmack - the surface is combustible, the cabinet is constructed of MDF. I could do the same thing legally if it were simply a drywall wall surface, too. There is no prohibition against protruding from the surface in either instance.
Gmack said:
We have all "screwed" a measurement. Spend more time with the architectual drawings...
I just screwed up applying the correct measurement. The cabinets didn't change, I was just being a doof that day. Thank you for the "we've all done that" comment, misery does love company every now and then. :D
 
Roger,

The OP concerns a box assembly projecting past "flush" beyond a copmbustible "wood cabinet" [surface] wall/finnish.

You keep linking to a non combustible set back which never allows a "protusion" beyond the contained box to a "semi" bi in the wall and out of the wall assembly.

The code language and the commentary wants/states for a flush installation. A listed box extension is to meet the wall surface, not extend beyond.

As for a non combustible wall protusion done by mistake.

If it is missed on the punch list in a non room/setting. Do better next time.

If in a patient room. Good luck getting the job next time!

We are electricians.
 
Thanks for clearing everything up Gmack :lol:

Roger, Sandsnow and George are correct there is no prohibition against sticking out past the surface, combustible or not.

Of course the customer may not accept it but the inspector can not fail it.
 
Gmack, what article and section are you talking about?

From you earlier post,

? 314.20: Revised to permit measurement to be made from plaster rings, extension rings, and listed extenders.

The intent is a measurement to the wall surface not"extending past or "project therefrom" the surface.

please, explain in you own words how you interpret "the intent" to mean not extending past or "project therefrom" the surface of a noncombustible surface.

A projection through a wall in a patient care area is no different if infection control measures are considered and adhered to, but that is not an electrical issue for the NEC or NFPA 99, heck, even Joint Commission wouldn't care.


Roger
 
Bob,

The inspector "did" fail it.

Hence the OP.

If on a combustible surface, code says an in the wall assembly with a "surface" cover must finnish flush.

State otherwise and show it by code.
 
Gmack said:
If on a combustible surface, code says an in the wall assembly with a "surface" cover must finnish flush.

It does not, read the article again.

I'll just go ahead and post it for you.

In walls and ceilings constructed of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall be flush with the finished surface or project therefrom.

Roger
 
Roger, we do not install boxes and rings or extensions to "project" from a wall.

To extend from a flush/surface cover we project with flex to office furniture. Example.

If you go back the revised 2005 says: Commentary,

or the 2005 Code, ``plaster ring, extension ring, or listed extender'' was added to make a list of the front faces in addition to just a box. This list of options of possible front surfaces clarifies from where the maximum clearance dimension could be measured.

The terms surface and with a surface of make it clear that the requirements of this section apply only to the construction of the surface of the wall or ceiling, not to the structure or subsurface of the wall or ceiling. Therefore, a wall constructed of wood but sheathed with an outer layer of gypsum board is permitted to contain boxes set back or recessed not more than 1/ 4 in. Using an opposite example, a wall constructed of metal studs but finished with wood panels requires that contained outlet boxes be mounted flush with the combustible finish.

Now, if you continue, you are not arguing with me but the NEC Handbook.

Good luck.
 
Gmack, the handbook commentary is just that and nothing more, but to appease you let me post the commentary so we are both seeing it as it is.

For the 2005 Code, ``plaster ring, extension ring, or listed extender'' was added to make a list of the front faces in addition to just a box. This list of options of possible front surfaces clarifies from where the maximum clearance dimension could be measured.
The terms surface and with a surface of make it clear that the requirements of this section apply only to the construction of the surface of the wall or ceiling, not to the structure or subsurface of the wall or ceiling. Therefore, a wall constructed of wood but sheathed with an outer layer of gypsum board is permitted to contain boxes set back or recessed not more than 1/ 4 in. Using an opposite example, a wall constructed of metal studs but finished with wood panels requires that contained outlet boxes be mounted flush with the combustible finish.

Now if you apply this commentary to the actual article, it does not change anything as far as "set back" rules for each surface type, and by no means prohibits protruding therefrom.

This part; "Using an opposite example, a wall constructed of metal studs but finished with wood panels requires that contained outlet boxes be mounted flush with the combustible finish", simply means that no set back is permitted for this construction type of finish, but once again, it certainly does not prohibit protruding the finish.


Roger
 
Roger, yes, if your talking "setback"

The OP is talking protusion past a combustible "surface"

The inspector cited "the box protusion" beyond the wall.

Give me an example, as an electrician,

Why would you "stick" a box in limbo /between surfaces.

Why would the NEC "think about that?

After calling for a "flush" installation?
 
Status
Not open for further replies.
Top