We're getting ready to finish our basement. The basement is already wired for electricity with wall-mounted metal outlet boxes.
However, the existing boxes will be way too shallow once the insulation and framing are put in. The existing box is 1.5" deep. We're planning to put in 2" XPS, and I'm told the chalk line for the top and bottom plates should be 4" in front of the insulation. So that would put the front edge of the framing 6" from the foundation wall. The guy at the hardware store suggested I use box extensions to bring the box out further. But the extensions are 1.5" so I would need to use three of them to bring the box out to 6". That seems a little awkward to me, and I have to do this with 8 outlets.
Are extensions the best way? Or can I instead remove the existing box and replace it with one that will mount to the frame stud? Should I use metal or plastic? Would I need to extend the conduit to reach the new box? Or should I just bite the bullet and call an electrician?
In any case I will also need to extend the wires, as there is not enough slack.
Best Answer
This is so easy, you'll laugh.
Now, the junction box is 4.5" proud of the wall, and 1" or so higher up the wall. Build your wall, make sure to include a hard point to mount the junction box.