Micorwaves nowadays have all of thier own safety features built into them. They are required by law to self contain all output of power. So basically you can install your microwave wherever it fits or wherever you want it. The only question is putting it close to the proper 3 prong electrical outlet.
If it is a simple standalone microwave then you just plug it into the wall. But if it is a wall microwave then I suggest you hire someone that knows how to install them because there is electrical wiring involved.
First clean the inside of microwave,then when move turntable in microwave,that will be automatically locked then fix the plat on the turntable. Afterthat fix the powerplugpoint and on the switch. Now installation is completed
Call electrician. Find out suitable place in kitchen for microwave. Check all the electricals. Take out one new connection for the microwave oven at the suitable place. Call company personal for instructions.