Hi, I’m Bob Schmidt with HomeRemodelWorkshop. A few months ago I posted a video about an adjustable electrical box that you can install let’s say you have
a whole room gut or it’s new construction for future changes you may change the
wall surface, the finish on it I got a lot of messages from people saying
well that’s all well and good but I already have the old-style electrical boxes
in my walls and now I want to add something to it, is
there a way of simplifying that to extend the box out. There is, I’ll show you what it is. What I have here is a PVC box
extension and what this is designed to do is a typical male on PVC box this is designed to actually fit inside
of the box below it extending out to to make sure you cover
up any of these spaces whether you put tile or another layer of drywall or wood and it will actually extend out to the new
finished surface giving a nice mounting plate for your outlet whenever working with existing electric the first thing you need to know is to
make sure that all the electric is off to this circuit I’ve already done that checked it with a
light and yes there are sometimes that the bottom plug will be on a switch and the top plug will be on a constant
circuit so just because the light goes off when
you turn that switch off on the wall doesn’t mean there isn’t a constant hot running through this plug so it’s always best to make sure that
you hit the circuit breaker off and make sure
that this entire circuit is dead before beginning when using this box extension
the first thing you’re going to want to do once the circuits dead is to back this plug out of the
circuit you’re going to tilt this plug like this and slide it temporarily back into the
box like that then whatever material you’re going to
use uh… in this case I picked up a three quarter inch piece of wood
here too…uh replicate, let’s say you’re putting a wainsecoat on but this will also work for tile, drywall, half-inch, five-eighths whatever then you cut your finish material lining it up directly over top of the
existing box then what you need to do is pull this
back out again take your box extension slide it over the top of this fixture and slide into the hole now here’s a critical part you see how these little tabs are
catching on your new finish surface you need to make sure you take some time
cutting this hole out accurately so that this tab will actually hit over top of
that surface what that does is that fills that gap
that void from plastic to plastic with this inserting inside now typically these come with an inch and a half extension screw I always make sure I get some longer
ones in this case I grabbed some two-inch ones because I know that
three-quarters is about at the max of uh… the box extension so what you do at this point is you take
this screw you slide it through here through the box extension back to the
existing box it might take you a second or two to line up with
the existing hole once you slid the box extension in then you went ahead and put the receptacle in front of it run the screws through the box
extension into the existing box it maybe a little bit of a pain in the
butt to get them to line up because you’re kind of working blind, the screws about two inches long and you’re going up and down trying to find
the right hole but once you get it started which just
take your time and get it go ahead and tighten these up and you’re
ready to put the plug cover back on with this box extension in place,
which is actually slid into the box behind it it gives us a nice solid surface for mounting our plate cover back on so that this box won’t move it won’t push in and out and it won’t go side to
side it will be nice and tight for your
new finish and there’s no open gaps around the edges where air or anything else can infiltrate. So there you go, at this point go ahead and simply turn your circuit breaker back on give your plug a test and make sure that
everything is hooked up still and nothing came loose and uh… your good to to. One more note if you get into this box, if this is an
older box, I know that this was a newer wiring type setup that I showed you here.
If you get into this box and you find old cloth wiring and it looks
deteriorated even a little bit or you see anything in there that looks like
it’s a potential short problem or something that you just can’t get into like
maybe there’s other wires running through this box that make it a little bit too complicated or
there’s not enough slack to pull the plug out call a qualified electrician. There is
no sense in the world for something as simple as this to potentially cause a
fire in your house but if it’s nice and clean looking and
it’s pretty close to what I just showed you here I wouldn’t hesitate to give it a shot. I’m Bob Schmidt with HomeRemodelWorkshop and thanks for watching. See you soon!


  • Bob,

    Thanks for posting this. I didn't know these devices existed! A few questions though:

    1) If I have metal new work boxes in, and I have to use the plastic "blue" boxes, how will this affect grounding issues? I prefer metal boxes wherever possible because I read somewhere about them being safer in case of a short, but perhaps you could clarify that for me.

  • 2nd question:

    If the existing wiring is too short to pull my receptacle out, I'd hate to call an electrician out to do something as simple as wirenut a few short extensions out a couple of inches. If I do that myself, I know that the wirenuts and additional extensions cram a little more into the box itself, but I'm assuming that the extensions boxes you're showing add a few cubic inches to the overall wiring box, so are these kosher code-wise?? I know code calls for an amount of space.

  • In the states its common to use a common ground wire that runs back to panel to ground.3 wire ===Bob These are not designed to work with metal boxes.

  • This is a perfect example of why I cannot recommend the typical homeowner or Diy'er doing any re-wiring of box without consulting a professional. Although I would not hesitate myself extending copper to copper,even thou I am not an electrician,not all people have seen as much as I have to have enough confidence to do the job properly.The fact that you have misgivings about the connection should tell you to consult a qualified electrician.Every person needs to know that he has limitations.===Bob

  • I generally do not recommend any re-wiring of electrical boxes by non-proffesionals even something that seems simple could become complicated quickly===Bob

  • Thats odd because I purchased mine at my local Home Depot,I suppose all stores do not carry all same stock items but I would imagine all electrical supply houses would.You can also look online to find providers in your area+++Bob

  • FWIW Each person has their own comfort and knowledge level about basic repairs and minor remodeling. If you called a pro every time some part of your home project fell out of your area of expertize your project would get quite expensive(even if you could get a pro to show up and bid a small project). I showed a situation where this applies, not all situations,and I believe the people looking for assistance with this particular situation will find this useful+++Bob

  • Very informative and useful information for me. I'm planning on doing a tiled backsplash in our kitchen, and this is just the sort of information and advice I needed. I was worried about how to allow for the new tile thickness for the electrical boxes…and voila…this is the ticket. Looks easy enough, and will save me some bucks on an electrician. Now my wife can spend those dollars on nicer tile for the project instead of hiring someone to re-do the electric boxes. Thank you sir!

  • @StuPadazzo A straight to the point kinda guy I appreciate that but some people need a bit more backround+++ Bob

  • Your videos are always so awesome, Bob. Thank you so much. This was, as yours always seem to be, exactly what I needed and saved me so much time and trouble. Thank you so much!

  • Bob – Excellent video – I just used these last night for the receptacles in my kitchen after we tiled our backsplash. One question though – any tips on best way to attach the trim plate for square style GFI outlets? The trim screw holes are located on the top/bottom and even though I tiled around the opening properly the screw holes don't have the normal clearance to let the trim plate screws fully fasten. Are there shorter trim plate screws out there? Or is it best to cut screws to length?

  • Hey Bob, this was great. Could you post the spec for the 2" screws?
    Many of us are novices and don't know the thread spec. I think they are┬á6-NF/32…

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