GB 4942.1-1985 standard defines the Protection level of the motor housing to ensure the Reliability of the motor under different environment conditions. The standard describes the classification of dustproof and waterproof according to the protection level (IP code) of the housing. The performance of the motor housing under the influence of environmental factors such as dust and liquid is evaluated by means of protection testing to ensure its safety and durability. This is essential for the application of the motor in various working environments.