Mov may refer to any of the following:
1. Short for Metal Oxide Varistor, MOV is a device found in surge protectors that grounds current anytime it is over the clamping voltage. An MOV can degrade or even fail if too much current is conducted. If it does fail, the surge protector's status indicator light will no longer be illuminated.
Do not confuse the status indicator with the power switch light, which is often only used to indicate the surge protector is getting power.