IP protection rating system is drafted by IEC. The electrical shell according to its dust, to prevent foreign objects intrusion, waterproof, anti-moisture characteristics to be graded. The foreign objects referred to herein include tools, human fingers, etc. are not accessible to the live parts of the lamp to avoid electric shock. IP protection level is composed of two figures, the first number that lamps dust, to prevent the intrusion of foreign objects; the second number that lamps moisture, water intrusion tightness. The greater the number, indicating that the higher the degree of protection, the two marked the number of protection levels shown in Table 1 and Table II.

The first marked characteristic number (number) refers to the degree of protection of the first marked number: 0 no protection against the outside world or no special protection IP0- 1 defense

Only more than 50mm of solid objects intrusion, to prevent the human body (such as the palm) due to accidental access to the interior parts of the lamp. To prevent large size (diameter greater than 50mm) of foreign objects intrusion

2 to prevent more than 12mm of solid objects intrusion, to prevent the human finger contact with the internal parts of the lamp. To prevent the medium size (diameter greater than 12mm, length greater than 80mm) of foreign objects intrusion

3 to prevent more than 2.5mm of solid objects intrusion, to prevent the diameter or thickness greater than 2.5mm tools, wires or similar small foreign objects invade and contact the internal parts of the lamp

4 to prevent more than 1.0mm of solid objects intrusion, to prevent the diameter or thickness of more than 1.0mm tool, wire or similar small foreign objects invade and contact the internal parts of the lamp

5 dust, completely prevent foreign invasion. Although not completely prevent the intrusion of dust, but the amount of intrusion of dust does not affect the normal operation of the lamp

6 dust completely prevent the invasion of foreign objects, and can completely prevent the intrusion of dust

The second marked characteristic number (number) refers to the degree of protection of the second marked number: 0 no protection against the outside world or no special protection

1 to prevent the intrusion of water, vertical drops of water droplets (such as condensate) on the lamps will not cause harmful effects

2 tilt 15 ° can still prevent the intrusion of water, when the light from the vertical tilt to 15 °, the drip on the lamp will not cause harmful effects

3 to prevent the spray of water intrusion, rain or against the vertical angle of less than 60 ° in the direction of the water sprayed into the lamp caused damage

4 to prevent the splash of water intrusion, to prevent the direction of the splash of water into the lamp caused damage

5 to prevent the injection of water intrusion, to prevent the injection of water from the nozzle from the nozzle into the lamp damage

6 to prevent the invasion of large waves, installed on the deck of the lamps and lanterns to prevent the invasion caused by flood damage caused by flooding

7 to prevent water intrusion when immersed, the lamp immersed in water for a certain time or water pressure below a certain standard to ensure that no damage caused by water

8 to prevent submerged water intrusion, the indefinite sinking of the lamp early to specify the state of the water pressure, to ensure that no damage caused by water

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