I am planning on putting beadboard wainscoting on a laundry room wall. I will need to add an extender to the dryer's 240v outlet to keep it to electrical code and have the outlet sit flush up against the extender. The beadboard will add 3/16" thickness to the wall.
I can't find a suitable product to use. I've used these in the past for 1-gang outlets, but there doesn't seem to be one for the bigger box. Which product should I use?
Here's a picture of the box, it is plastic and W: 3.75" H: 3.5":