How do you install electric box in drywall?

More to the point is how are YOU going to get wire to and from the box. Installing the box is the easy part. You first find a stud and measure the box dimensions onto it with one side almost touching the stud. Now, using a 'Keyhole' saw or drywall saw, cut out the box shape. At this point, I insert a 'fish' tape and pull the wire through, usually from the top. I pull the wire out enough to feed into the box and then push the box into the cut shape. Then screw the box into the stud obliquely, or if you've got an 'old work' box, turn the screws on the box to fix the 'ears' and secure the box. Now you can wire the outlet or switch in. -Turn off power first .