IP4X

From:www.ce-mag.com/archive/06/ARG/bisenius.htm

IP Codes

An IP code is a rating assigned to a product that indicates its level of ingress protection, that is, the amount of protection that the enclosure of the product provides against the entry of solid foreign objects (fingers, tools, and so on) and against moisture infiltration (from rain, for example). IP codes have the format IPxx, where the xs represent numerals from the coding scheme. The first number in the sequence signifies the degree of protection against the entry of foreign solid objects. The range of available numbers is 0–6 (see Table I). The second number signifies the degree of protection against the entry of moisture and may be anything from 0 through 8 (see Table II). The letter X may be used as an alternative for zero. The protection is greater as the number is higher.

Numeral	Characterization of Ingress Limit
0 or X	Not evaluated
1	≥50.0 mm diameter object
2	≥12.5 mm diameter object
3	≥2.5 mm diameter object
4	≥1.0 mm diameter object
5	Dust-protected
6	Dust-tight
Table I. The first numeral in an IP code indicates the degree of protection from solid foreign objects.

Numeral	Characterization of Ingress Limit
0 or X	Not evaluated
1	Dripping water: vertical
2	Dripping water: 15° tilt
3	Spraying water
4	Splashing water
5	Jetting water
6	Powerful jetting water
7	Temporary immersion
8	Continuous immersion