The IP (Ingress Protection) rating system is used to classify the level of protection an electrical device has against the intrusion of solid objects and liquids. The first digit (1-6) represents protection against solids, and the second digit (1-8 or 9K) represents protection against liquids.
Solids Protection: The first number indicates the protection against different sizes of solid objects, ranging from large objects like hands to tiny particles like dust.
Liquids Protection: The second number indicates the level of protection against various forms of water exposure, from dripping water to complete submersion.