Type of protection
The types of protection for electrical operating equipment (e. g. electric motor) are specified in DIN 40050, 1980. They encompass protection against accidental contact, foreign bodies, and water. The internationally agreed types of protection start with the codeIP ("International Protection), which is followed by two digits. The first digit specifies the protection provided by the enclosure with respect to physical contact or foreign bodies, and the second number specifies the protection against moisture. See Fig.1 Type of protection
Special types of protection are designated by the letters W (weather protection) and R (pipe connection for motor cooling).