IP ratings of housings and chassis denote the degree of protection against both solids and liquids.
|Objects greater than 50mm||1|
|Objects greater than 12.5mm||2|
|Objects greater than 2.5mm||3|
|Objects greater than 1.0mm||4|
|DOES NOT EXIST||7+|
|Vertically dripping water, 3-5 mm of rainfall per minute for 10 minutes, assuming unit is in its proper orientation.||1|
|Angled dripping water, same as 1 but up to 15 degrees off normal position.||2|
|Sprayed water, up to 60 degrees from vertical, at 10 Litres per minute, pressure up to 100 kN/m2 for 5 minutes||3|
|Splashed water, same as IPx3 but all angles||4|
|Water jets, all angles, water squirted through a 6.3mm nozzle at 12.5 L/minute pressure of 30 kN/m2 for three minutes from distance of 3 metres||5|
|Pressure jets, 12.5mm nozzle with flow rate of 100 Litres/min and pressure of 100 kN/m2 for 3 minutes from distance of 3 metres||6|
|Immersion to 1 metre, for up to 30 minutes||7|
|Indefinite immersion, suitable for continual submersion as specified by manufacturer. Depth is given by manufacturer.||8|
|DOES NOT EXIST||9+|
|Impact of 0.225 Joule (150g weight dropped from 15cm)||1|
|Impact of 0.375 Joule (250g weight dropped from 15cm)||2|
|Impact of 0.5 Joule (250g weight dropped from 20cm)||3|
|Impact of 2.0 Joule (500g weight dropped from 40cm)||5|
|Impact of 6.0 Joule (1.5Kg weight dropped from 40cm)||7|
|Impact of 6.0 Joule (5Kg weight dropped from 40cm)||9|
|DOES NOT EXIST||10+|
An enclosure with an IP rating of 66, means it is dust tight and protected against liquid from pressure jets. Even at this high rating, it is not appropriate for temporary or permanent immersion in water.
A normal domestic powerboard would probably have a rating of IP40.
So if you've got something outside in the rain you'd want IP64 minimum.
Anything claiming their device is IP7_ or IP_9 is not covered by this numbering scheme.
There appears to be a new range of IPX-x ratings. All it means is no specific statements about dust, and the rating is purely for waterproofness.
This file last modified Tuesday August 23, 2011
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