Is this idea safe / legal? (wiring question)

Hello there,
I am installing semi-built in desks in my living room. I am going to be installing some low voltage lighting (with a plug-in transformer) and I would like to have a place for plugging in a desk lamp and a charger for a phone and a laptop.
There is an outlet that will be lost (completely hidden by the desk base).
I would like to plug a three prong extension into the outlet, and feed a new outlet, enclosed in a surface mount box from that extension cord. This would be mounted in the side of the upper desk/ bookcase.
I do not think it is code acceptable (Northeast, IL, where the rules are especially tough (all wiring in rigid conduit, additions with flexible metal conduit, etc.). But, with that said, is this a safety risk? The biggest risk I can imagine would be if someone plugged a high draw item into the new outlet, and overloaded the extension cord. To prevent this, I am considering using a two prong receptacle, but that could be a bigger risk if something was plugged in with an improperly grounded 3/2 adapter.
Please tell me if this is an unsafe idea.
Thank you very much, in advance, for your time and input.
ar7499
Replies
Why not just mount a power strip and be done with it? A good many of them have an overload sensor in them and you can get them in black, white or tan so they don't have to be any more obvious than an outlet.
I agree with cuss
Cut out your deskpanel at the outlet so you can access it to plug in and remove. Run the plug strip cord how you will, but make it avaialble for disconnecting. Perhaps keep the plug strip below the desktop, bore a nice hole and drop cords down to that plugstrip. There's desk "grommets' to pretty up the hole you bore.
or
open up the wall and add another box where you want it. If load allows, run off the box you are not going to be using. Do keep access to that existing outlet.
thank you for the reponses. In my attempt to keep my post short, I forgot to mention that I intend to use 1/2 the 2 gang box to install a switch for the lights. This would be wired off the second side of the blocked outlet...... that is why I don't want to just use an extension......
If
It's in the same stud space as the old outlet-cut in a two gang remodel box and fish down to that old outlet.
Use a box extension if your desk unit is out from the wall the thickness of the panel. Mount your outlet and switch with long screws. Lay that beautiful cover plate on there and be done with it.
In my attempt to keep my post short, I forgot to mention that I intend to use 1/2 the 2 gang box to install a switch for the lights. This would be wired off the second side of the blocked outlet...... that is why I don't want to just use an extension......
If by this you mean that you would be switching room lights from this extended box, then extension cords are out -- you need to do it up proper, with an access panel that lets you get an an extension box over the existing from which conduit (as required locally) is run to your new location.
Don't know if it's code compliant or not, but I've done it lots, typically with an 1110 box. If you're worried about overloading the extension cord, don't use it. Go get yourself a nice piece of 14/3 or 12/3 Cabtire cable (SOW). Put a proper heavy duty grounded plug on it.
And when running the cable into your receptacle box, rather than squishing the cable with an EMT or flex connector, get a proper "Strain Relief" connector intended for Cabtire. Big Box stores sell all of this stuff.
I think I agree with the others, mostly:
-- Make your own extension cord with #14 or better wire, or use a heavy-duty plug strip. (Don't forgo the 3-prong outlet.)
-- Have some sort of removable access panel that will allow access to the plug connection without totally disassembling the desk.
Again, thank you for your thoughts.
Calvin, I really don't want to put in a new outlet. I am comfortable with this type of work, but my house was built in the 1940's. The walls are plaster over 2 layers of wall board, and I don't want to guess at the challenges I would find trying to snake flexible conduit through the cavity. The house was rewired with new service and all new switches and plugs, however, and the boxes are all filled to their limits (all plugs are double wired so one side is switched). I think It would be a challenge and possible danger to add more wires inside the box, and it is really impossible to swap or increase the box capacity because it is so old and solid.
Dan. I would be switching a transformer for some low voltage accent lights, and one side of the new outlet, which would be for a desk light.
I might make a heavy duty cord. This was my original plan, and I have some 12/3 wire I bought for the job. The problem is that low profile plugs seem to be as expensive and harder to fnd than extension cords with a nice three prong low profile plug. I assume that the wire in an extension cord would be stranded, not solid, and I don't know if that matters.
Thanks again.
ar
>>>I assume that the wire in
>>>I assume that the wire in an extension cord would be stranded, not solid, and I don't know if that matters.
It most certainly does. You should never use solid wire for extension cord purposes. The constant flexing will cause the wire to eventually break at the terminals.
....Not to mention the fact that solid wire makes for a nasty, ugly, and uncooperative extension cord!
.
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Uh Oh.... I think I hear Ol' Art gittin' ready to tell a bunch of stories about how he used NMD for extension cords; just like he buries SOWJ for service runs. Yikes!!! ;-)
I have seen low-profile "repair" plugs at, I think, the local HD, but if you can't find that you could use a heavy-duty plugstrip with a low-profile plug and cut the cord off of that. You want the wire to be stranded, and #12 (or whatever) stranded will carry the same current as the same # solid.
Do include the access panel in any event
McMaster Carr has hospital grade clear 90 deg plugs for 15 to 19 bucks. Those are sweet plugs, I have used them at work but I'm too cheap to buy them at home. I bought some Harbor freight plugs once, those are clearly lacking the quality you'd expect, but they don't appear too dangerous.
Well,
Thank you all again. This forum is always extremely helpful.
I have decided to buy a replacement appliance cord. 12/3 with the right angle plug I need. I will use this to wire the new oultet. I will cut an access panel at the original wall outlet as well.
Thanks again,
ar7499