IP65 vs IP67 vs IP68 for Electronic Enclosures
IP65, IP67 and IP68 do not form a simple good-better-best ladder for every electronic enclosure. The first digit 6 is shared; the second digit represents different water-exposure tests. Start with how water can reach the finished enclosure, then define the target code, configuration and verification method.
If water jets and immersion can both occur, define both exposure requirements instead of assuming that one designation automatically covers the other.
Representative configured enclosure shown for engineering context. The image is not evidence of a particular IP rating or test result.
IP65, IP67 and IP68 share the first digit 6; the comparison is mainly about the different water-exposure requirements represented by the second digit.
Read the Two Digits Separately
IP65, IP67 and IP68 all begin with the same first digit. The decision changes at the second digit, which represents different water-ingress test conditions. Reading the digits separately prevents the common mistake of treating a larger number as a universal enclosure ranking.
Compare IP65, IP67 and IP68 by the Exposure They Represent
The most useful comparison is not “which number is highest?” but “which water exposure is actually relevant to the finished enclosure?” The table below keeps that distinction explicit and avoids treating jetting and immersion as one continuous ladder.
Tablet: swipe horizontally to compare all columns.
| Decision factor | IP65 | IP67 | IP68 |
|---|---|---|---|
| Water exposure represented | Water-jet exposure. | Temporary immersion. | Continuous immersion under specified conditions. |
| What the designation alone does not establish | It does not by itself establish immersion protection. | It does not by itself show that the separate IPX5 or IPX6 jet tests were passed. | The numeral 8 alone does not define one universal depth, duration or operating condition. |
| Jet performance assumption | The second digit 5 is the applicable water-jet designation. | Do not assume jet performance solely from the numeral 7 designation. | Do not assume jet performance solely from the numeral 8 designation. |
| Immersion context | Immersion is not represented by the second digit 5. | Temporary immersion under the applicable IEC test conditions. | Continuous immersion under conditions defined for the applicable product or test program. |
| Configuration dependency | The enclosure, joints, interfaces and assembly state still matter. | The tested or verified configuration must be identified. | The configuration and the agreed immersion conditions must both be identified. |
| Main specification risk | Using “IP65” as shorthand for submersible protection. | Assuming a higher second digit automatically covers water jets. | Accepting the label without defining the actual immersion requirement. |
This comparison is decision support, not a substitute for the applicable standard, product requirement or project-specific verification plan.
Water Jets and Immersion Are Different Requirements
IPX5 and IPX6 address jetting; IPX7 and IPX8 address immersion. That change in test type is why IP67 should not automatically be treated as a complete replacement for an IP65 or IP66 requirement.
If a project can see both directed water jets and immersion, state the real exposures and verification requirements separately. Do not rely on a presumed “higher number covers everything below it” rule.
The Rating Depends on the Configured Enclosure
The IP Code describes a degree of protection provided by an enclosure or defined enclosing configuration. For a custom electronic enclosure, the useful engineering question is therefore not just “what is the body material?” but “what exact joints, interfaces and assembly state are being assessed?”
Representative engineering illustration. It explains the sealing boundary; it is not a certification image or project test record.
A Small Configuration Change Can Change the Verification Basis
Ingress protection is sensitive to interfaces. Changing a connector, gland, vent, gasket, cutout, cover, fastener arrangement or sealing-surface treatment can change what must be reviewed even when the enclosure body looks almost the same.
Released / verified basis
- enclosure revision and cover geometry
- gasket material and section
- connector, gland and vent selections
- cutouts and interface geometry
- fastener pattern and assembly requirement
- defined finish and sealing surfaces
Change introduced
- new connector or gland size
- added or relocated cutout
- different gasket material or geometry
- new vent, window or control
- cover / fastener change
- finish or masking change at the sealing interface
A change does not automatically mean the enclosure will fail, but it can invalidate the assumptions behind an earlier verification basis. Review the affected interfaces before carrying the previous claim forward.
Turn the Exposure Into a Project Requirement
A useful RFQ or design release translates the environment into controlled inputs. The goal is to make the required configuration, verification basis and evidence scope explicit enough that engineering, sourcing and quality teams are discussing the same requirement.
This is a requirement-definition example, not a certificate or test report. If a field is not known yet, keep it as an open assumption for review rather than filling it with an unsupported default.
Define Verification Before You Release the Claim
A target IP code is only useful when the project also identifies the configuration being assessed and the evidence required. This is especially important when custom cutouts, connectors, glands, vents or sealing details differ from an earlier or catalogue configuration.
Representative verification setup. Test method, final configuration, testing provider and documentation scope are defined by project; verification does not automatically mean third-party certification or listing.
Verification does not automatically mean third-party certification or listing. Define the required test party, documentation and approval scope for the actual project.
Avoid the Most Common IP Specification Mistakes
Most IP-rating mistakes come from treating the code as a marketing hierarchy instead of a defined protection requirement. Correcting these assumptions early reduces ambiguity before enclosure design, quotation and verification.
Use the Standards to Define the Requirement—not as a Marketing Shortcut
PrecMade uses authoritative standards as the reference basis for engineering discussion, while the applicable edition, product requirements, test conditions and evidence scope still have to be confirmed for the project.
The IEC standard provides the formal framework for degrees of protection provided by enclosures. Use the current applicable edition and product requirements when a project requires formal verification.
Open the official IEC listing →NEMA explains that IEC IP degree ratings and NEMA enclosure Types are not one-to-one equivalents because the NEMA system addresses additional characteristics beyond solids and water ingress.
Open NEMA enclosure guidance →This guide is engineering decision support. It does not replace a purchased standard, an end-product standard, a certification requirement or a project-specific test plan.
Choose the Next Step Based on What You Already Know
You do not need to force every visitor directly into an RFQ. Use the path that matches how clearly the exposure, enclosure configuration and verification requirement are already defined.
Still defining the exposure
Use the comparison and requirement-definition sections above to separate jets, immersion and open assumptions.
Build the Requirement Definition →Requirement is defined
Move from the rating logic to the commercial enclosure page for sealing architecture, customization and project review.
Review Custom Waterproof Enclosures →Drawing / configuration is ready
Send the available drawing, revision, quantities, interfaces and environmental requirements for project-specific review.
Start an Engineering Review →