Most switches and outlets are installed after mechanical rough-
ins, drywall and paint are completed. When you shop for devices
like switches and outlets, there are several different types to
wade through. Make sure to get the device that works properly
with the circuit. The type of switch you install is determined
by the circuit's wiring scheme. Outlets are pretty standard, but
GFCIs are required in some rooms and box size is another thing
to consider. Sizing Junction Boxes All switches and outlets
(receptacles) need a properly-sized junction (electrical) box.
For example, a 2" x 3" box with 3 wires (14 gauge) should be 2
1/2" deep. The same box with 5 wires must be 3 1/2" deep.
Installing an undersized box is probably the most common wiring
mistake for do-it-yourselfers. When in doubt, it's usually best
to use a larger box. If you're not sure about box size
requirements, remember to ask your electrical inspector when
submitting diagrams. Here's one way to calculate minimum box
size: 1. Count the number of wi