| Standard and scope | IEC 60529 classifies the degrees of protection provided by enclosures against access to hazardous parts, solid foreign objects, and water. | Confirm which enclosure was tested: the lock electronics, a sensor housing, or the complete installed cover assembly. An IP rating for one component does not automatically apply to the entire installation. |
| First digit: 6 (dust-tight) | The “6” indicates dust-tight protection under the applicable test conditions, with no ingress of dust. | Check that the rating covers the enclosure containing the electronics and that cable entries, seals, connectors, and access panels are included in the tested configuration. |
| Second digit: 7 (temporary immersion) | The “7” indicates protection against harmful effects from temporary immersion in water under the specified IPX7 test conditions, commonly summarized as immersion to 1 m for 30 minutes. | Ask for the test report or declaration identifying the tested product configuration and conditions. Do not treat the rating as proof of protection during permanent submersion or every real-world flooding scenario. |
| Water-jet protection | IPX7 immersion protection does not, by itself, state that the enclosure has also passed the separate water-jet tests associated with IPX5 or IPX6. | If cleaning with jets or exposure to forceful spray is expected, verify the required jet protection separately. A combined rating should explicitly state the relevant rating, such as IP66/IP67, when both are needed. |
| Mechanical load capacity | IP67 describes enclosure ingress protection; it does not specify the structural load rating of a manhole cover or frame. | Check the applicable load classification, design documentation, and installation requirements for the intended location and traffic conditions. Verify the cover and frame as a matched assembly. |
| Locking strength and security | IP67 does not measure resistance to forced entry, tampering, cutting, or unauthorized unlocking. | Review the mechanical locking design, resistance to tampering, access-control method, credential management, and documented security testing independently of the IP rating. |
| Corrosion and outdoor durability | IEC 60529 IP ratings do not establish corrosion resistance or long-term durability in salt, chemicals, wastewater, or soil. | Check material specifications, coating or corrosion-test evidence, seal replacement guidance, and compatibility with the actual site environment. |
| Power, communications, and operation | IP67 does not guarantee battery life, wireless range, alarm delivery, or reliable operation while immersed. | Review operating-temperature limits, battery replacement intervals, communications coverage, low-battery alerts, and the documented operating state during and after water exposure. |
| Evidence to request | A rating should be supported by documentation that corresponds to the product and configuration being supplied. | Request an IP test report or conformity documentation, installation instructions, maintenance requirements, and confirmation of whether the rating applies to the assembled cover or only to an internal component. |
| Practical selection takeaway | IP67 is a useful enclosure-protection specification for dust-tightness and defined temporary immersion; it is not a complete measure of manhole-cover performance. | Choose a solution using separate evidence for ingress protection, structural loading, locking security, corrosion resistance, and site-specific operating requirements. |