Whether it is safe to plug a microwave into an outlet that already has another appliance plugged in depends on the total power load on that circuit and the electrical capacity of the outlet and the wiring in your home.
Each electrical circuit in your home is designed to handle a certain amount of power, which is measured in amps (A) or watts (W). If you exceed the capacity of the circuit by plugging in multiple high-power appliances, it can lead to overheating of the wires, potential damage to the appliances, or even a risk of electrical fires.
To determine if it's safe to plug a microwave into an outlet that already has another appliance, you need to consider the following:
Electrical capacity: Check the electrical panel in your home to find the circuit breaker that controls the outlet in question. The circuit breaker should be labeled with its amp rating. Typical household circuits are 15 or 20 amps.
Power rating of the appliances: Check the power ratings of the microwave and the other appliance that you want to plug in. The power rating is usually listed on a label on the back or bottom of the appliance and is measured in watts (W) or amps (A).
Total power load: Add up the power ratings of the appliances you want to plug in. If the total power load is below the amp rating of the circuit (e.g., the total power load is less than 15 or 20 amps for a standard circuit), then it should be safe to plug in both appliances.
If the total power load exceeds the circuit's capacity, it's not safe to plug in both appliances simultaneously. You should consider moving one of the appliances to a different outlet on a separate circuit.
It's essential to practice electrical safety and avoid overloading circuits to prevent potential hazards. If you're unsure about the electrical capacity of your circuits or the power requirements of your appliances, consider consulting a licensed electrician to assess your home's electrical setup and make any necessary adjustments.