IP code is a system to indicates the protection provided by enclosure against access to hazard parts, ingress of solid foreign objects, ingress of water and so on. Refers to IEC60529, the second characteristic numerals indicates the degrees of protection against ingress of water, and show as numerals from 0 to 8. Omitting first characteristic numerals, the degrees of waterproof can be show as below: IPX0: no protection IPX1: protected against vertically falling water drops. IPX2: protected against vertically f all water drops when enclosure titled up to 150. IPX3: protected against spraying water. IPX4: protected against splashing water. IPX5: protected against water jet. IPX6: protected against powerful water jet. IPX7: protected against the effects of temporary immersion in water. IPX8: protected against the effects of continuous immersion in water. The test for IPX1 and IPX2 are made with a drip box which produces flow of water drops over th...