I have a interior brick wall, with wall outlet in it, I am covering the wall with 1/2" sheet rock. But I am ancoring 1x2's on the brick so I can hang the sheetrock. How would I extend the wall outlet since I will not have a 2x4 to attach the box?
You can also buy tabs (outlet shims) that interlock together to extend the box out. Used often for tile (I believe they are sold in the tile and electrical sections at Lowes).
If what you're doing results in the outlet/switch sticking out further than the box though, then the above would be the way to go.