Oversize switches o. undersize mudring?

[wyreman]

I'm trying to install the ceiling fan controller in a metal mud ring and it's is just ever so slightly too big for the opening.
I bet the ceiling fan controller would fit just fine in a plastic box.
Anyone have any idea why the switch manufacture uses these dimensions which don't quite fit the metal mud ring?

In belief, man can do anything

 

[GoldDigger]

I'm trying to install the ceiling fan controller in a metal mud ring and it's is just ever so slightly too big for the opening.
I bet the ceiling fan controller would fit just fine in a plastic box.
Anyone have any idea why the switch manufacture uses these dimensions which don't quite fit the metal mud ring?

My guess is that making it a little bit smaller would have cost a lot more money, possibly using more expensive components or just spending more on the design?
Or their engineer was not told about mud rings.

 

[Smart $]

Anyone have any idea why the switch manufacture uses these dimensions which don't quite fit the metal mud ring?

Because the standard they are manufactured to allows it? ...