Yes, it is generally safe to leave your microwave plugged in when it is not in use, even if there is nothing inside it. Modern microwaves are designed with safety features to prevent any electrical hazards or risks when they are not actively in operation.
Microwaves typically have a standby mode or display clock function that keeps the microwave connected to a power source even when not in use. This allows the microwave to power its internal clock or display and be ready for use when you need it. These standby modes consume a minimal amount of electricity, so it shouldn't significantly impact your energy consumption.
However, if you have concerns about power usage or want to minimize energy consumption, you can consider unplugging the microwave when it's not in use. This can be done by either unplugging it directly from the power outlet or using a power strip with an on/off switch. Keep in mind that unplugging and plugging in the microwave repeatedly may cause wear and tear on the power cord and the outlet over time.
Regardless of whether the microwave is plugged in or not, it is always important to follow the manufacturer's instructions and safety guidelines provided in the user manual. If you have any specific concerns about your microwave model, it is advisable to consult the manufacturer or refer to the user manual for accurate information.