can i run a homerun using a 20amp breaker , 12/2 wire to run both a microwave and a refrigerator? Nothing else will be on this circuit
If the microwave is a built in one, then it requires its own circuit. The fridge can go on one of the outlet circuits of the kitchen. The code requires at least two 20 amp circuits for the dining room and kitchen outlets. Most appliances that are direct wire, such as the dishwasher and disposal also require their own circuits.