**Before you finalize a location, determine if there will be any electric lines, plumbing, heater ducts, or any other obstruction that may pass through the wall cavity that you'll be working in. This cabinet will fill the entire depth of the wall cavity.
There's no set way to do this. It will vary from house to house. Here's a couple guidelines to help determine if its a safe location.
Some of the commercial stud finders also have a non-contact voltage detector built into them. You can also look lower on the wall to see if there are any outlets close by. Wires typically run horizontally through the studs from one outlet to the next, but sometimes the wires will be fastened to the studs to run vertically either up to the attic, down to the basement, or even over doorways.
Ductwork will always run parallel between the studs (or between floor joists). If ductwork runs perpendicular to the studs or floor joists, it will be outside the studs or under the joists. Look for any heat registers nearby. They can be in the wall, ceiling, or floor. In a multi-story home, you also need to be aware of any vents that may be in the same general location on the floor above you.
Again, be aware of your location. If you're in a family room and don't have a bathroom or kitchen in close proximity you're probably safe. If there's a sink directly above you up stairs, you may want to investigate some more.