Dual IP Rating
Declaring two codes together to show that an enclosure has passed both the water jet and the immersion test; the typical notation is IP66/IP67. In IEC 60529 the second digit is not cumulative: a higher figure does not mean the tests below it are automatically passed.
The first digit (solid objects) is cumulative: an enclosure rated 6 also meets 5. With the second digit the situation is different. IPX5/IPX6 are jet tests, IPX7/IPX8 are immersion tests, and these do not substitute for each other. That is why an enclosure marked only IP67 cannot be assumed to withstand a wash-down gun.
- Correct declaration: if both conditions have been tested, two codes are given side by side as IP66/IP67 or IP65/IP67.
- Purchasing question: if your site has both pressure washing and standing water, look for a dual code rather than a single one; writing only IP67 into the contract does not buy jet resistance.
- Specification practice: define the requirement not by the code but by the test condition: such as a 6.3 mm nozzle jet and 1 m / 30 min immersion.
On AXI products the declared values are single codes (IP64 and IP67); since there is no dual rating claim, you have to solve the wash-down scenario outside the remote control.
The context in which this term is used: Wireless Crane Remote Control Selection Guide