The IP (INGRESS Protection) protection level system is drafted by IEC (International Electrotechnical Technical Communication), which classifies electrical appliances based on their dust and moisture resistance characteristics.
The IP protection level is composed of two numbers. The first number represents the level of dust prevention and foreign object intrusion prevention of the electrical appliance (including tools, human fingers, etc., which cannot touch the live parts inside the electrical appliance to avoid electric shock). The second number represents the degree of sealing of the electrical appliance against moisture and water infiltration. The larger the number, the higher its protection level.