Safety Standards For Wall Switches In Humid Environments

The risks of contact with electrical equipment in humid environments are often overlooked. When you touch Wall Switch with wet hands, your body resistance will drop from tens of thousands of ohms in a dry state to less than 1,000 ohms. At this time, even a 220V household voltage may generate a dangerous current of more than 30mA, which is enough to cause cardiac arrest. Statistics show that more than half of electric shock injuries and fatalities in my country each year are caused by improper operation in humid environments.

Wall switch panels and buttons in high-humidity spaces such as bathrooms and kitchens have gaps. Moisture in the humid air easily condenses into tiny water droplets here, forming a conductive path. When wet hands touch these wall switches, the moisture can seep into the internal circuitry through these gaps, significantly increasing the risk of short circuits or leakage. Modern electrical design codes clearly require that wall switches in humid locations have a protection rating of no less than IP65. In Zone 0 and Zone 1 areas such as bathrooms, wall switches should be installed outside the door.