Mikesh,
Mr.Q is correct about these OTR Microwaves.
In my own house when we did the kitchen, we installed one of these units. It came equipped with a 5-15P and I installed a dedicated 15A circuit. It wasn't until I read the instructions on how to mount the thing that I realized that the manufacturer states that it draws 13A.
Maybe an Inspector needs to ask why the CSA is approving the sale of appliances in Canada that are coming equipped with a 15A cord end and require more than 12 A.

Bruce