So my dryer outlet was a classic 3 prong surface mount setup. After taking it apart to paint around it, I noticed that there was actually 10/3 NM run to it and the ground wire had been cut flush with the romex casing and not attached to anything. Since I also have a new washer I have decided to do it right and install the 4 prong outlet.

Since the ground was cut short I have to move the box up from 18" from the floor to about 24" from the floor just to make sure I have enough cable to get the ground connected.

In this process I also decided I will flush mount the outlet to make it look cleaner and help save some space.

I have a 25 cubic inch old work box with the plastic ears mounted into an exterior wall. I just want to make sure that it is big enough for what I want to do. (also I want to make sure it is okay to completely remove the little tab where the romex enters the box). Also, I want to ensure that these boxes are okay for 220 volt.

Thanks,

Ed