Convection Outlet Rewiring Outlet To Handle Load From Microwave/ Convection?

Rewiring outlet to handle load from microwave/ convection? - convection outlet

The house I live in was built 2,001th I think the installation of a mixed convection / microwave in the kitchen area. I hired an electrician working for someone else, said they needed to process from existing cable to the loads. Is that true? I thought the house was built fairly recently, so how old is the existing wiring I need it? There is already a number of furnace is connected to an outlet on the same wall, and it handles very well the power. I think he tries to do something else to load my favor and I basicially alarming for no reason. Does anyone else have any ideas? Am I wrong? Thank you.