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andrelaplume2

pre wire walls

17 years ago

I'd like to drywall the walls in my basement I have framed and have all the outlets wired when I do the ceiling. Can I just leave some extra conduit by the box and run the conduit through the walls leaving a loop where each outlet goes; drywall, cut holes, pop in the boxes and then when I get the electrician he need only connect the conduit to the main box and wire each outlet? Is this offensive to the electrician? Against code?

Comments (7)

  • 17 years ago

    The normal procedure is to rough-in the electrical before hanging the drywall. By rough-in I mean to run the conduit, install boxes, and pull wire but not install any devices or make-up connections at the service panel. At that point an electrical inspection is done. If you install the drywall the inspector can't see your work (and could require to you rip out the drywall).

    It's also the easiest way to do the work.

    Unless you have a good working relationship with the electrician most won't put their name on somebody else's work.

  • 17 years ago

    Seems a little bass akwards to me. It is normal to do all the rough-in wiring before drywalling especially if conduit is required. Normally, if you are using conduit, metal boxes are required which require connections between the conduit and the boxes. What you are proposing would make these connections difficult without cutting out more drywall. Presume you are trying to get out of trimming the drywall from around the boxes.

  • 17 years ago

    Any drywaller will have no problem cutting out for outlet boxes. They have to do it any time they drywall.

  • 17 years ago

    Re:
    The normal procedure is to rough-in the electrical before hanging the drywall. By rough-in I mean to run the conduit, install boxes, and pull wire but not install any devices or make-up connections at the service panel. At that point an electrical inspection is done. If you install the drywall the inspector can't see your work (and could require to you rip out the drywall).
    It's also the easiest way to do the work.


    Yes I think this is what I was getting at. On my end I'd need to make sure:

    1) I left enough conduit at the service panel.

    2) I used propper conduit.

    3) I did not run too many outlets on the conduit or run two lines.

    4) I'd need to predrill all the studs 1/2" from the stud's back (I think) and put nailers in place.

    5) I'd need to run the wire through creating a loop of some size where the outlets will be for the electrician to eventually cut the loop and install the outlets.

    6) Not sure on whether I put metal boxes in or use the blue boxes thru the wall after the drywall is up though...its a basement and I would think plastic would be safer than metal but I am not sure what code would be.

    Boxes aside, I was not aware the inspection could be done before the hookup but that would be great. I could have the electricain out to see the prewire and get estimates to finish that portion of the job as well as do the ceiling at a later date. I could then drywall, mark where the boxes go knowing the wire it hanging back there and thus get my materials off the floor and by me some time to get my ceiling supplies and install them.

    Make sense? It seems the most streamlined for me but I do not want to put anyone out, offend or violate any code. Its not really even a big job and most suggest they would not even have the elctrical inspected but I'm a bit anal that way.

    Of course its been pointed out that a simple inspection for 5 or 6 outlets and cans might open a can of worms with framing issues, insulation issues, future tax increases etc etc. Most work I have done my self and try to determine code and go beyond to cover myself..right size nails, right type nails, propper methods to attach foambaord etc etc. I only really planned on getting the electrical inspected...not even sure framing requires inspection in our 20 year old basement. We are doing no plumbing either....really just want to get some perimeter walls framed up and insulated, a dropped ceiling in palce and carpet so the kids have a warmer, cleaner area to play....nothing fancy.

    Thanks!

  • 17 years ago

    Depending on your local conventions they may or may not want you to make the service panel connections at rough-in time.

    As to your points:

    1. What do you mean "leave enough conduit" at the panel? You run it exactly as long as needed. You don't leave slack in it like you would with the wires.

    2. Unless you're in Chicago or someplace like that, conduit isn't required (and not commonly used) with the appropriate cabling. If you are in a place that requires conduit you'll have to know what they expect.

    3. Huh? A conduit only has two ends. If you mean how many receptacles you can put on a branch circuit, it most cases it's not bounded.

    4. Nailers? You mean nail plates? Not required for most conduit installations, nor if the wires are more than 1 1/4 from the face of the stud.

    5. Oh so you are using an electrician...ask him how long he wants the tails left then.

    6. Code doesn't care metal or plastic as long as it's listed, you need to make sure if you're using conduit that you can fit conduit to the boxes you buy (i.e., there not just some NM-only clamp arangement).

    There are two electrical inspections, one at the rough-in stage where everything is visible and then one at the final stage.

    You don't leave the wire hanging back there, you install the boxes. When you hang the drywall, you cut the boxes at that time for a couple of reasons:

    1. You'll never find them again if you don't.
    2. They're supposed to be near flush with the finished surface, which you will not get if you don't make a hole in the drywall.

    If you are going to use an electrician to finish this, bring him in now. He's putting his license on the line and has to deal with the mess you make at the roughin stage.

    Don't know where you are, but you can be darn tooting around here that you'll need a building permit for the basement walls. At the minimum be sure to use PT bottom pltes.

  • 17 years ago

    With all due respect, if I read your message correctly you're trying to keep costs to a minimum and avoid a building inspection to keep from opening a can of worms and/or adding to the cost of your project. That's certainly understandable, we all want to save money and inspectors can cause a bit of trepidation, mostly from the fear of the unknown. Building codes exist for a reason. They can help protect us from ourselves but more importantly they help protect the future owners of your home. One could certainly argue that if, for example, your house burns down due to your substandard workmanship, it's just tough luck on you. I don't think you can argue that the next owner of your home should have to accept the same risk. You should also realize that municipalities are using databases to track renovation projects. If you go to sell your house and your finished basement doesn't show in the database, you may have a problem. Now that I've gotten off my soapbox, let's talk about your project.

    1. Are you required by local code to use conduit? The only reason I ask is that it's lot harder to install than cable (aka Romex).

    2. I would STRONGLY suggest using the standard building methods. Cutting holes for boxes and trying to install them after the drywall is hung is going to be a royal pain in the butt. Either carefully measure and cut holes in the drywall before hanging it or use a Roto-Zip. If you are hell-bent on doing it that way, I'd suggest lots of pictures along with measurements before you hang the drywall.

    3. I would STRONGLY suggest talking to an electrician BEFORE you start your project. DIY and no inspections might raise a few flags and you may have a hard time finding one who will even touch this kind of work. It would also be a good idea to get some kind of price before you start. Assuming you find an electrician, he's going to be put at risk (it's his license on the line) and he's going to pass that risk on to you in the form of more money.

    Hope this helps...

  • 17 years ago

    ok,

    1) Not trying to avoid inspections for electrical or plumbing...not even doing plumbing. I am not aware you need an inspection to finsish (frame portion) a basement in my area. I would like to avoid them if it means my taxes go up which may or may not be an old wive's tale.

    2) Trying to save $$$$. You bet. I am capable of framing some exterior walls around the interior of teh basement and hanging a dropped ceiling. I thought the pre-wire involved getting the wire where it needed to go with out hooking anything up. I guess I could have the elctrician do it all, get it inspected then drywall then have them back again when I get to the ceiling. Its just a pain to even get someone out for such a small job now a days and the cost is high for the short period of time they are there when they could be taking a job for an entire day.

    I used the word conduit incorrectly, it is not required, shoudl have said romex.

    RE:
    Don't know where you are, but you can be darn tooting around here that you'll need a building permit for the basement walls. At the minimum be sure to use PT bottom pltes.

    Not really sure what you mean. I am using pt bottom plate, galvanized nails, propper nailing techniques, propper insulation etc etc.

    I did mean nail plates, cheap and adds safety.

    Thanks for the advise, I think I was on the right track thinking I could essentially just loop the romex thru the walls having it hooled up at a later date...obviously not for the electricisan I guess. I'll get a professional in to run the wire and connect everything.