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Panel to stud screws

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27K views 119 replies 28 participants last post by  Majewski  
#1 ·
I recently had an inspector tell me that the wrong screws were used to place a 200 amp panel in the wall cavity. I checked and drywall screws were used - no problem except she wouldn't tell me the correct ones to use. Question: I checked around and can't seem to get a straight answer. So, what type of screws are used to attach a panel in between the studs? Thanks.
 
#61 · (Edited)
The sheetrock screw is not designed to handle physical loads of the panel or anything except mostly glued and self-vertically supported sheetrock without nearly any load pulling it off horizontally.
The sheer strength of the shaft and the holding of the screw thread is dangerous for anything but sheetrock. I understand that majority of electricians have no clue about the mechanics and design of a screw, but the number of defiant and reckless statements here is unacceptable. Just because you got away for years with improperly affixing the panel does not mean it is right. That screw needs to last for 50+ years. When is the last time you looked at your unsafe installation after 50 years? When is the last time you checked your own screwing and took corrective actions?
It is certain that if anything happened to the panel (e.g. fire) your liability insurance company would have the basis to deny you coverage. Having a license imposes the obligation to be a responsible adult and not yahoo.
The inspector has the right and obligation to point out the improper application of sheetrock screw to electrical installation - it is in the code that you need to learn. Just because you have no respect for inspectors does not give you the right to ignore them.
If you think you are correct to oppose an inspector's order - show the line and verse in the code that supports your claim or else shut up and obey.
 
#62 ·
The sheetrock screw is not designed to handle physical loads of the panel or anything except mostly glued and self-vertically supported sheetrock without nearly any load pulling it off horizontally.
The sheer strength of the shaft and the holding of the screw thread is dangerous for anything but sheetrock. I understand that majority of electricians have no clue about the mechanics and design of a screw, but the number of defiant and reckless statements here is unacceptable. Just because you got away for years with improperly affixing the panel does not mean it is right. That screw needs to last for 50+ years. When is the last time you looked at your unsafe installation after 50 years? When is the last time you checked your own screwing and took corrective actions?
It is certain that if anything happened to the panel (e.g. fire) your liability insurance company would have the basis to deny you coverage. Having a license imposes the obligation to be a responsible adult and not yahoo.
The inspector has the right and obligation to point out the improper application of sheetrock screw to electrical installation - it is in the code that you need to learn. Just because you have no respect for inspectors does not give you the right to ignore them.
If you think you are correct to oppose an inspector's order - show the line and verse in the code that supports your claim or else shut up and obey.
LOL
 
#69 ·
My goodness this is turning into another stud notching thread. Wallboard screws may be “brittle” and not “listed” for the application, but once you get the service cable or conduit installed and the romex-loomex clamped, it’s not going anywhere with the screws removed.
No. It probably could become a discussion of UL listings. RE: Is a drywall screw listed for use to hold up an electrical panel? Or is it listed for drywall, or is it listed at all. I am guilty as most for using screws that are lying around. But it the inspector calls it out, it may be BS, but it is still not incumbent upon the installer to know the proper materials for use....
 
#77 ·
There is no requirement for fasteners to be listed or etc. like equipment is. That doesn't mean it's a free for all and you can stick panels to the wall with bubble gum if you want and the inspector has to go pound sand. Article 110 does cover this. It refers you to ANSI/NECA 1-2015 if you need to read about that. I just googled and found the contents online, Chapter4 is all about anchors and fasteners. Of course I've never read it myself, that would be like Michaelangelo reading a paint by numbers book.

Drywall screws are for drywallers; people who wait until after noon to start drinking use better fasteners for their work. FFS, don't be picking through drywallers' debris for hardware, it's just undignified.

110.12 Mechanical Execution of Work.

Electrical equipment shall be installed in a neat and workmanlike manner.
Informational Note: Accepted industry practices are described in ANSI/NECA 1-2015, Standard for Good Workmanship in Electrical Construction, and other ANSI-approved installation standards.

(A) Unused Openings.
Unused openings, other than those intended for the operation of equipment, those intended for mounting purposes, or those permitted as part of the design for listed equipment, shall be closed to afford protection substantially equivalent to the wall of the equipment. Where metallic plugs or plates are used with nonmetallic enclosures, they shall be recessed at least 6 mm (1 ∕4 in.) from the outer surface of the enclosure.

(B) Integrity of Electrical Equipment and Connections.
Inter‐ nal parts of electrical equipment, including busbars, wiring terminals, insulators, and other surfaces, shall not be damaged or contaminated by foreign materials such as paint, plaster, cleaners, abrasives, or corrosive residues. There shall be no damaged parts that may adversely affect safe operation or mechanical strength of the equipment such as parts that are broken; bent; cut; or deteriorated by corrosion, chemical action, or overheating.

110.13 Mounting and Cooling of Equipment.

(A) Mounting. Electrical equipment shall be firmly secured to the surface on which it is mounted. Wooden plugs driven into holes in masonry, concrete, plaster, or similar materials shall not be used. Don't be picking around on the floor for salvage, either come to work with the basic necessities or go to a hardware store and spend the damn $1.79 for a pack of screws.
 
#78 ·
There is no requirement for fasteners to be listed or etc. like equipment is.
OK. but the expectation is that things be securely fastened. How can you claim a screw with a recommender load rating of 25kg won't hold a panel securely?

Black screws matter. :D