On Tuesday, July 7, 2020 at 8:05:58 AM UTC-5, wrote:
I have 2 gang box and I need to expand it to 3 gang.
Looked at several videos on U-tube and others, but they all suggest removing the existing box and replacing it with 3 gang plastic.
Don't like to use plastic because the threads strip to easily.
I thought the industry made it simple to add another gang to the existing older gang-able romex style steel boxes ?

The existing boxes are probably something close to this:
https://www.homedepot.com/p/Steel-Ci...-25R/202597292

The building is 40 years old. The boxes are gang-able, but how do gang and extra w/o removing the old ?

Thanks

I looked at the Arlington stuff, what I saw was plastic or vinyl. Its a pain when the threads strip out of the plastic stuff.
This switch will see a lot of use (cycles), so I wanted to make as sturdy as possible.

I was in the big boxes the other day and was looking at ganging 3 Raco(s) together and screwing them in the wall/King-stud.
The other end could be the version with the clamps that tighten up ? Already has the NM clamps.
Looks like it would solve a lot of the problems ?

Thanks