How is the introduction of the waterproof connector?

I. How is the introduction of waterproof connector? Waterproof connector is can be applied to the environment with water, in the case of withstand a certain amount of water pressure to ensure that the connector internal mechanical properties, electrical properties can be normal use of the connector. p (INTERNATIONAL PROTECTION) protection level system by the IEC (INTERNATIONAL ELECTRO-TECHNICAL) COMMISSION). The electrical appliances are graded according to their dustproof and moisture-proof characteristics. IP protection class is composed of two numbers, the first number indicates that the electrical appliances are free from dust, preventing the intrusion of foreign objects, and the second number indicates that the electrical appliances are moisture-proof, waterproof intrusion of the degree of confinement, and the larger the number indicates that the higher the level of protection. The higher the number, the higher the level of protection. 0: no protection: no special protection against external people or objects 1: prevent >50mm of solid objects from intruding: to prevent the human body (palm) from accidentally touching the internal parts of the appliance; to prevent >50mm of foreign objects from intruding 2: prevent >12mm of solid objects from intruding: to prevent the human body (fingers) from accidentally touching the internal parts of the appliance; to prevent >12mm of foreign objects from intruding 3: prevent >2.5mm of solid objects from intruding: to prevent >2.5mm of foreign objects from intruding 3: Prevent >2.5mm of solid objects from intruding: prevent >2.5mm of tiny foreign objects from touching the internal parts of the appliance 4: Prevent >1.0mm of solid objects from intruding: prevent >1.0mm of tiny foreign objects from touching the internal parts of the appliance 5: Dust-proof: completely prevent the intrusion of foreign objects and the amount of intruding dust will not affect the normal operation of the appliance The second digit indicates the level of protection 0 The second number indicates the protection level 0: No protection: No protection 1: Prevent dripping water intrusion: Vertical dripping water droplets will not cause harmful effects on the appliance 2: Tilt 15 can still prevent dripping water intrusion: Appliance tilted 15 dripping water will not cause harmful effects on the appliance 3: Preventing the intrusion of sprayed water: rain, or preventing the vertical <60 direction of the sprayed water intrusion into the appliance causing damage 4: Preventing the intrusion of splashed water: Preventing the splashing of water in all directions causing damage to the appliance 5: Preventing dust: completely preventing intrusion of foreign objects, and the amount of dust intrusion will not affect the normal operation of the appliance Prevents damage caused by water intrusion into the appliance5:Prevents intrusion of sprayed water: Prevents damage caused by water sprayed in all directions into the appliance6:Prevents intrusion of dusty waves: Prevents damage caused by waves intruding into the appliance mounted on the deck7:Prevents intrusion of water when submerged: the appliance is submerged in water for a certain period of time or at a certain standardized water pressure to ensure that the appliance will not be damaged due to the ingress of water8:Prevents intrusion of water when submerged: the appliance is submerged in a certain standardized water pressure indefinitely. Submerged in a certain standard of water pressure, can ensure that the appliance does not cause damage due to water ingress

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