Line voltage is a term used to describe the voltage that is supplied to a device from a power source. It is the voltage that is used to power the device and can be found on the device’s power supply. Line voltage is usually expressed in volts and is typically between 110 and 240 volts. Line voltage is an important factor to consider when purchasing and using electrical devices, as the wrong voltage can cause damage to the device or even be a fire hazard. It is important to check the voltage rating of the device before purchasing and to make sure that the power source is supplying the correct voltage. Additionally, it is important to make sure that the wiring is properly installed and that the correct voltage is being supplied to the device. Line voltage is an important factor to consider when dealing with electrical devices and can be the difference between a safe and successful installation or a hazardous one.