How to Install Rough Electricity in New Construction | Ask This Old House

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Published 2018-09-26
Ask This Old House master electrician Scott Caron helps a homeowner wire her new basement that she’s in the process of turning into finished space.

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Time: 6 hours

Cost: $100 and up

Skill Level: Moderate

Tools List for Installing Rough Electricity:
Hammer
Drill
Lineman’s pliers

Shopping List:
New work electrical boxes
14/2 non-metallic cable
Cable staples
Wire nuts

Steps:
1. Running new electrical work usually requires a building permit. Consult with your local building department for more information.
2. Electrical boxes should be mounted 18” to center off the floor for outlets. Secure the nails in the boxes directly to the studs.
3. Code requires that from any point on the wall, an outlet should be within 6 feet. This is the minimum requirement.
4. Drill a hole in the center of every stud for running wire.
5. Unroll the 14 gauge cable to flatten it, then feed it through the holes in the studs. Run enough wire to reach each box and have some extra slack for working.
6. Attach the cable within 6” of the box using a cable staple.
7. Strip 8” of sheathing off the wire and feed it into the box.
8. In boxes with multiple conductors, splice the bare ground wires together and cap with a green wire nut, leaving one bare wire exposed.
9. Mount an electrical box at 48” to center from the floor for a light switch.
10. Run a wire from the outlet, through the switch box, to the first light fixture. From there, connect the other fixtures with wire.
11. Attach the wires for the lights to ceiling joists with a cable staple.
12. Connect the wires to the light fixtures.
13. Secure the light fixtures in place.
14. Tie the feed wire from the closest outlet to the circuit panel. Ensure power is of

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How to Install Rough Electricity in New Construction | Ask This Old House
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All Comments (21)
  • @PastorGooch
    Whoever chose the thumbnail picture knew what they were doing
  • @ThePowerGeek
    Loved the demonstration of the proper use of an adjustable hammer at 3:31 😂
  • Speaking as an electrician from Louisiana everything he said is 100% correct. The only thing I wish he would have mentioned is the type and correct wire to use. For most applications you can use either 14 gauge or 12 gauge. We typically use 14 gauge because it is easier to work with. The wire we use is called non metallic (NM) romex. For receptacles and single pole switches we use 2 wire with ground. For 3 way switches we use 3 wire with ground. For 4 way switches we use 4 wire with ground. What they used is called 14/2 with ground NM romex
  • I never get tired of watching professionals hammer things with side cutters.
  • @philzrad
    "Call in an inspector" haha, that's a good one TOH.
  • @CharlesLumia
    Thanks Scott! I'm confident enough to not shock myself or burn the house down now. Wish me luck everyone!
  • @007KrausBean
    Very helpful. If there is one thing that scares me the most about construction and home repair, it's electrical. I know it is fairly simple, but the thought of what it can do to my home if it goes bad is so scary. I want to learn more about it so I can handle more than just hanging ceiling fans and lights, and changing out outlets and switches. Wiring help is great. Thanks for posting.
  • @oldrustycars
    "When you need a hammer, anything within arms reach becomes one."
  • @truepatriot8751
    Every time I hear that intro music. I know I'm going to learn some thing new
  • @masspyro5167
    I swear to god, Ive been watching a ton of these videos since Im home on quarantine and this electrician more often than not always does a project for a nice looking girl
  • @bigjay7433
    If you put your plugs and Lights on different circuits, when you plug something in and trip the breaker you still have lights to see.
  • @jackoshea687
    When you use side utters to nail in staples make sure you use the side that doesn’t pivot .
  • @willd3808
    this girl and the one that wants a new sink, are probably the two best looking ones ever on the show ;)
  • @DanFilipi
    I love how these videos give only just enough information to get into trouble.
    I’m getting more calls lately to fix homeowner mistakes and to finish projects like this.
  • @samuelt2072
    It's always so nice to be able to do your work on new construction.
    I know (of, at least) one woman that's an electrician, and she says she seems spend half her time on jobs where she's on her back, in a fourteen inch high crawl space, pushing herself along with her elbows and feet, with big hairy spiders crawling all over.
    How come by we don't get to see that on these shows?

    Added 9/28/18:
    Holy crap, there's a lot of experts out there!! Amazing that anyone else can get anything done... right!
    Remember, the "code" is the MINIMUM requirement; anything beyond that is usually (!) okay, too. As for the inspector: better get that green tag because if anything goes wrong, no matter who did the work, the homeowners insurance might not cover it. (Note: even the inspector gets it wrong sometimes)
  • Easy way to make sure receptacles are the same height off the floor is to cut a piece of scrap lumber from the bottom of the first receptacle installed to the floor. We did this after I flooded in 2016 when re-wiring my house. Took about two hours
  • @lal12
    Interesting how different the standards are here in Germany, the used cables and the outlet boxes look quite different too. We usually drill a big round hole in the board before it comes up to the dry wall, then the cables are just pulled through, and later a round outletbox is placed and fixiated with 2 screws in the hole. Also we have a different color scheme of the different wires and ground is isolated too. We also have no wire nuts as far as I know instead we use a terminal strip or nowadays often spring-loaded terminals, which he calls push in connectors on the lamp.
  • @Femur15
    I just installed 3 new boxes and receptacles in my garage. None of the studs had square edges, they were all rounded and I had a hard time keeping the boxes even on the studs to keep the reveal for drywall.
  • @dthorne4602
    Probably the most watched TOS video every day. Wonderful.