On October 31, 2018 at 11:03, highfigh said...
I suspect the second outlet was installed after the place was open and they had "their guy" do the work. If they had been installed during construction, they might have used Decora for both.
Reasonable assumption. I think that the Decora outlet was installed first (look at the paint), but the whole affair could have been the result of cobbling stuff together from a junk box. However, that is an odd sort of plate to have lying around.
