If an appliance is plugged in and both the appliance's power switch (if applicable) and the switch on the plug are in the off position, the appliance is generally not liable to power surges. Power surges occur when there is a sudden increase in electrical voltage in the power supply, and this increased voltage can damage electronic devices.
When an appliance is completely switched off at both the appliance's power switch and the plug switch, it essentially breaks the electrical circuit. In this state, there is no complete path for electricity to flow into the appliance, so it won't be affected by power surges.
However, it's important to note that while this configuration protects the appliance from power surges, it may still be vulnerable to other electrical issues such as lightning strikes or electrical storms. In these situations, it's always a good idea to unplug sensitive electronic devices or use surge protectors to safeguard against potential damage.
Additionally, even when an appliance is switched off, it is still connected to the electrical system, and there may be a small amount of standby power consumption. This minimal power usage is for features like displays, clocks, or standby modes in some appliances, but it's usually negligible compared to the power consumed when the appliance is fully operational. If you want to completely eliminate power consumption, you can unplug the appliance from the outlet.