An IP rating has two digits: the first for protection against solids, the second against water. So IP66 is dust-tight and resists powerful jets, and IP67 survives temporary immersion. The rating describes the housing, not the lens, the cable gland or the connector.
Outdoor cameras fail at the joints more often than at the housing. A high IP number on the box says nothing about how the installer sealed the cable entry.
Reading the two digits
The first digit runs from 0 to 6 for solids and the second from 0 to 8 for water, with 8 meaning continuous immersion. A single number such as IP5 is incomplete.
What the rating leaves out
It does not rate impact, corrosion, ultraviolet damage or condensation from temperature swings, all of which matter on a wall in Colorado.
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