The IP code or International Protection rating classifies the degrees of protection provided against the intrusion of solid objects, dust, accidental contact and water in electrical enclosures. The standard aims to provide users with more detailed information than vague marketing terms such as waterproof.
IP65 means complete protection against contact and no ingress of dust. The object is protected by water jets projected by a nozzle (6.3mm) against enclosure from any direction resulting in no harmful effects.
IP67 means complete protection against contact and no ingress of dust. The object is protected and ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1m of submersion).