What's the Difference?IP65 vs IP66:
IP65 and IP66 are two of the most commonly specified protection ratings for industrial electrical enclosures.
Both provide complete protection against dust ingress, but they differ in their level of water protection.
An IP66 enclosure provides:
Complete protection against dust
Protection against powerful water jets and heavy washdown conditions
An IP65 enclosure provides:
Complete protection against dust
Protection against water jets from any direction
IP65
IP66
Industrial automation
Indoor manufacturing facilities
Outdoor equipment under normal weather conditions
Control panels and junction boxes
Harsh outdoor environments
Utility infrastructure
Food processing facilities
Water treatment systems
Exposed industrial installations
IP65 vs IP66 Comparison
General outdoor protection is required
Equipment is not exposed to heavy washdown
Standard industrial environments
Which Rating Should You Choose?
Dust Protection Dust Tight Dust Tight
Harsh outdoor conditions are expected
Additional water protection is needed
Equipment is exposed to heavy rain
Frequent washdown cleaning is required
Water Protection Water Jets Powerful Water Jets
Outdoor Use
Washdown Areas Limited Recommended
Harsh Weather Exposure Good Better
Choose IP65 When:
Choose IP66 When:
Common Enclosure Types Available in IP65 & IP66
The protection rating is determined by enclosure design, sealing systems, and construction quality rather than material alone.
Powder-Coated
Mild Steel
Stainless Steel 304
Application Recommended Rating
Aluminum
Both IP65 and IP66 enclosures can be manufactured from:
Stainless Steel 316
Factory Automation IP65
Outdoor Control Systems IP65 / IP66
Telecom Equipment IP65 / IP66
Utility Infrastructure IP66
Food Processing Plants IP66
Water Treatment Facilities IP66
Is IP66 better than IP65?
IP66 provides a higher level of water protection. However, IP65 is sufficient for many industrial and outdoor applications.
Are IP65 enclosures suitable for outdoor use?
Yes. IP65 enclosures are commonly used for outdoor installations where protection against dust and rain is required.
Does IP66 mean waterproof?
IP66 protects against powerful water jets but is not designed for submersion.
For temporary immersion, IP67 may be required.
Can the same enclosure design be manufactured in both IP65 and IP66?
Yes. Protection ratings depend on sealing design, gasket systems, door construction, and testing requirements.
Which rating is commonly used for industrial outdoor enclosures?
IP65 and IP66 are both widely used, with IP66 typically selected for harsher outdoor environments and washdown applications.
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