Ensure outside connected to hot melt rubber machine of voltage is meet hot melt rubber machine itself, as single-phase 220V voltage standard of hot melt rubber machine equipment if using 380V power Shi will damaged hot melt rubber machine spray equipment, as single-phase 220V voltage standard of hot melt rubber machine equipment if using below 220V of power Shi, cannot reached equipment design performance, also may damaged hot melt rubber machine, wiring Shi should ensure its power line right of received Yu outside of power device of location Shang.