Where shouldn't you use a gfci?

Answer 1

Since GFCI's are more expensive, you wouldn't want to use them in any place where they are not required. In many old homes, GFCI's are sometimes used for outlets in bedrooms and living rooms where proper grounding is necessary (for computers, TV's, other electronics), but not available because of the age of the wiring. You would also want to avoid cramming a GFCI into a box that is too small to accommodate the bulkier GFCI outlet. You should first replace the box to a larger one.

Answer 2

GFCI's are required or used where water is close by, a sink, shower or similar. They would not be required in a bedroom or in most living rooms.