Currently I'm not able to pull the built-in microwave out to examine the outlet, so am leaning on the expertise here. It is a duplex outlet and the connected breaker is 20A, constructed around 2005. I'm looking at replacing the existing outlet with a recessed outlet to accommodate the larger depth of a new microwave. The new microwave is rated at 14.7A.
I have found a single receptacle 20A standard clock hanger recessed outlet. Is there any reason NOT to use this? Because it is a built in, there is no practical need for a duplex outlet.
The other option available is 15A recessed duplex outlet. Is it within code to put a duplex 15A outlet on a 20A breaker?