Top Ten Brands of Jinzhou Medical Device Fans

The live wire enters the switch first and then the light bulb, so that the switch can control the light bulb. When the light bulb is damaged, the switch can be turned off to cut off the live wire, which is safer to operate.

The live wire enters the switch first and then the exhaust fan, so that the switch can control the exhaust fan. When the exhaust fan is damaged, the switch can be closed to cut off the live wire, which is safer to operate. As shown in the figure below: