I'm probably overthinking it, but I'm trying to mount the SimpleHuman horizontal paper towel holder. It turns out that the best place for it is in the middle of the inner wall (5.1 inch wide) but above a socket which is located on the bottom of the wall. The three screws are about 1.1 inch each. I'm not drilling a hole, just using a normal mechanical screwdriver. Is this a concern at all?
1Is it safe to screw [into a wall]... - I thought this was going to be about the concerns of a paper towel holder simply existing above an outlet.– MazuraFeb 4, 2020 at 1:34
3if it can carry two people ...– Hagen von EitzenFeb 4, 2020 at 7:31
1@HagenvonEitzen "how many people does it take to screw on a paper towel holder?" "Just two, if it'll hold the weight"– Mike GFeb 4, 2020 at 14:01
If you are concerned about the presence of wiring near where you are installing this, grab yourself a stud finder with "live wire" detection from your local hardware store. Entry level models are inexpensive. This way, you can find the studs and the wires. More expensive models may also detect other services (e.g. metal plumbing or gas pipes).
If you are just going to attach the holder with screws, or with the skinny little excuse for anchors usually included with these sort of things, you run the risk of the holder coming out of the wall over time, because at least one of those two mounting holes probably won't line up with a stud (unless you've got some super wide studs).
Grab yourself some drywall (plasterboard) anchors or spring toggle devices to get a better hold on the wall. The former looks like a big plastic screw, with room for another screw in the middle, and a flat tip. This is is shown in the first picture below. These bite in to the drywall (plasterboard) and get a firm grip, providing you with a rigid hole to screw in to.
The latter (spring toggle, second picture) consists of a screw with spring loaded wings that spring apart after you push them through a wall. Naming may be different in the US, but I would expect they would still be readily available. The objective here is to distribute the load of the holder (and anybody pulling on it) over a greater area to avoid ruining your wall.
Be somewhat wary of the drywall (plasterboard) anchors though if you ever want to remove the holder, as they do tend to make a mess when they come out.
For the holder, I normally screw it a little further in and apply a layer of plaster over the indentation. I don't see the point of making a hole where the stud used to be.– NelsonFeb 3, 2020 at 15:40
@T.J.L. - Those are my preferred type unless it needs a toggle bolt. Anchor Size #6 to #10 x 1-5/8" Self-Drilling Drywall Anchor, Plastic – grainger.com - IDK remember what the question is, but if it goes into drywall, it's either of those, +1– MazuraFeb 4, 2020 at 1:15
The spring toggles don't leave a mess if you later remove them. Just the neat hole that you drilled, which you can easily fill and paint over. But they are single use. Unscrew the screw and the toggle drops down inside the wall.– nigel222Feb 4, 2020 at 13:24
@T.J.L. I'm not sure what you mean. That's definitely a drywall anchor. The 'flat tip' is the pointy end (flat like a knife) is meant to cut a hole to start it but I find drilling to be more reliable. The screw goes in the center of the cross-shaped driver socket. Feb 4, 2020 at 15:35
If you're planning on using the screw in anchor like the one on the left they also make them out of metal. I would highly recommend grabbing the metal kind as they are tougher and hold better. Just make sure you don't screw it into wire itself. :D Feb 4, 2020 at 20:48
I wouldn't worry too much. Modern electrical standards have wire stapled an inch and a bit back from the interior of the drywall. If your screws are less than 1.5" long, you shouldn't hit anything. If you are pre-drilling for drywall plugs, only go 5/8" in.
It's ideal (and still safe) if you get one screw into a stud. There should be one either on the left or the right side of that outlet.
11If you remove the cover from the outlet, you can probably see which side of it the stud is on, which should tell you exactly where the wire is fastened.– WGroleauFeb 3, 2020 at 7:02
3I'm not sure that "you shouldn't hit anything" is quite as positive as it needs to be when dealing with potentially fatal voltages.– MikeBFeb 3, 2020 at 14:06
2@MikeBrockington If you really want to find out, it involves tearing down the whole wall. Generally, electricians follow code and generally people do not do stupid things, but we can't possibly offer a guarantee. Under normal circumstances, you're not suppose to be hitting a wire (normal for a towel rack, normal length studs and screws, properly installed wires). Even if the wire happens to be right behind where you drill (low chance, but not impossible), there is normally enough space to successfully install a stud and screw before puncturing wire).– NelsonFeb 3, 2020 at 15:38
3"If you really want to find out, it involves tearing down the whole wall" - not really - as noted in the other answer, a decent stud finder will trace where the wire is going, particularly which side of a stud it has been nailed, if at all - in the UK it seems quite common for the wire to be loose between two studs. Opening the socket itself will also help, but the whole point of (that part of) the regulations is that the area immediately above a socket is a specific danger zone.– MikeBFeb 3, 2020 at 16:14
Good question! Your primary goal is to assure that you do not have a screw it a wire, and become "hot" possibly electrocuting someone at an inopportune time! The secondary goal is to get a sound mechanical connection for your holder.
As pointed out by another poster, generally, but not all the time, there is a stud on the right or left of an outlet. Usually studs are on 16" centers, but in smaller rooms like bathrooms they may not be. A hot wire detector is a good tool to identify where wires may be, but a stud finder is a good way of detecting where the studs are. So using a stuf finder (or your knuckles rapping on the wall, and detecting sound changes), I would identify where the stud is. Then I would try to get one of your mounting screws into a stud.
For the other screw, I would consider a plastic insert that goes into the drywall, and using a screw that only protrudes 1/2 to 5/8" past your holder into the wall. That will reduce the possibility of hitting a wire.
The paranoid, who own a voltmeter, will check for any voltage on the screws relative to ground, when the job is complete. It only takes seconds, and gives confidence that someone with wet hands, and another part of their body grounded, will not get the shock of their life at some inopportune moment.
1I, of course, am careful to only electrocute people at opportune moments.– RafaelFeb 5, 2020 at 0:23
Another perspective is to think if there would ever be a risk of dropping a metal object onto a plug which is in the outlet.
If the plug isn't quite in all the way then the electrified prongs could be exposed. A metal object making contact could in the worst case lead to injury or fire. Or at least a blown breaker.
(This is one argument for why some people prefer that US-style outlets should be installed the other way around - with the ground pin at the top).
A related risk could be handling a plug with wet hands, more likely to occur near the source of paper towels. There could even be a nonzero risk from dripping water, perhaps.
In this particular situation the risk of this seems quite small at any time other than when you are installing the holder. You might drop a metal part, tool, screw, etc. So the simple precaution it to not use that outlet while you're working above it -- or at least make sure whatever's plugged in is fully inserted.
I would also be concerned about reaching for a paper towel with wet hands and dropping some water down at the plug/socket interface.
The risk must at least be higher near where you are likely to have wet hands, or to be holding something wet.
(TBC to add - photo of towel dispenser at work)