Can I use 110vac on 220v band heater？
No, it is not safe to use a 110V AC band heater on a 220V power supply. The voltage and frequency rating of a heating element are designed to work with a specific power supply. If you use a heater with a lower voltage rating on a higher voltage supply, it will draw more current than it's designed for, which can cause the heater to overheat and fail.
In addition, using a heater with the wrong voltage rating can be a fire hazard and can damage the equipment you're trying to heat. It's important to use a heater that's rated for the voltage and frequency of the power supply you're using.
