I searched on this site and also google and couldn't find anything definitive on this.
My GC installed a single-gang outlet box behind the range for a NEMA 14-50R outlet. Most of the 14-50R outlets require a two gang box, but I found this one by Preferred Industries that says it works with a one-gang:
Is this ok? I know there is a way to calculate the fill requirements to get minimum cubic inches of an electrical box but am not sure how to do it for this type of outlet.
Here is a matching one-gang wall plate: https://www.wilmar.com/Sku/94-7470/flush-mount-1-gang-wallplate-white-078477836781-80528-w