Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4653347.
Note: Most of the preview images were not correctly generated. To see them all, feel free to check out this design on Cults3d at:
https://cults3d.com/en/3d-model/home/wall-plates-variety-fusion-360
The important stuff:
This fusion file is set up to allow you to generate multiple types of north american wall plates, as well as single or multiple gangs, and oversize or undersize plates.
To choose the type, suppress all sketches (the icon looks like a square and a pencil) except "PlateBody" and whichever type of plate you want from the history in the bottom left.
To change gangs (or other parameters) go to the "Modify" menu and "Change Parameters"
Note that one of the limitations of how I made this is that all the gangs will be the same plate type. Also, I doubt that multiple gangs will work as intended unless you leave the plate width on "standard (69.85mm)"
Please note that because of the wide variety of plates that can be generated from this file, I have not had a chance to test all the different variations. Please let me know if something doesn't fit and needs to be adjusted. In particular, the "Single Receptacle" plate was designed from dimensions found online. I did not have any way to even attempt to test that one.
I have also included a few STL files that I have pre-generated in case you don't have Fusion 360, but if you want anything custom, you'll need it.
Additional:
This was made as kind of an experiment. I wanted to see how I could create a single fusion file that could generate a lot of different wall plate variations. I'm not sure if there is a better way to do this. You will notice when you first open the Fusion 360 file that there are a lot of warnings. This is normal as it is trying to generate all the different plate types at once, and they end up conflicting with each other. I was originally going to suppress all the sketches except "PlateBody" and then instruct people to unsuppress the sketch of the one they want, but it seems that Fusion 360 messes up and starts displaying things incorrectly if the file is saved with a bunch of things suppressed, so I had to leave everything unsuppressed.
** If you liked and used this, please post a make! It will help other community members see what variations people have had success with. **