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About This Project
Plastic boxes and flexible non-metallic sheathed cable (one brand is Romex) put electrical wiring projects within the skill range of every dedicated DIYerIn this article, we’ll show you some basics—how to position outlet and switch boxes and run electrical cable between them. We won’t cover many other details. For help with circuit design and making connections to your main electrical panel, we recommend you consult a licensed electrician.
Besides standard hand tools, you’ll need a special-purpose tool to cut and strip wire. We like the Klein No. 1412 ($18 at hardware stores and home centers). To drill a few holes, use a 3/4-in. spade bit in your electric drill. For larger jobs, rent a heavy-duty right angle drill ($25 per day) and equip it with a 3/4-in. x 6-in. auger bit ($7).
Electrical wiring mistakes can be deadly, so make sure you obtain a permit from your local building department and have the work inspected when you’re finished. Draw a sketch of your room that shows lighting, switch and outlet locations. Review your plan with the inspector and ask whether there are any special requirements.
Nail Up Boxes
First mark the box locations on the studs using symbols to indicate outlets, switches and lights.
 | Duplex receptacle |
| S | = Single switch |
| S3 | = Three-way switch |
 | = Light fixture |
Mark the height from the floor to the center of the boxes (usually 48 in. for switches and 12 in. for outlets) or line them up with existing boxes. Then nail up the boxes so the face of the box will be flush with the face of the future wall covering. Most boxes have nibs or marks to help you align the box for use with standard 1/2-in. thick drywall. If you’re not sure how thick the final wall material will be, use a special adjustable depth box. Paddle fans require a special box assembly that is rated to support the weight and stress of a spinning fan (see “Special Boxes”).
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