IP54 vs IP55 vs IP65: Which Enclosure Rating Do You Need?

Explain IP ratings and how to choose the right one for your environment.

IP (Ingress Protection) rating tells you how dust and water resistant an enclosure is, and how much protection it gives against water.

The first digit is solid particle protection (0-6), second is liquid protection (0-9)

IP54: dust-protected (limited ingress, no harmful deposit), splash water from any direction

Typical for indoor panels, office environments

IP55: limited dust ingress, water jets from any direction

Typical for indoor industrial, factory floors

IP65: dust-tight, water jets

Typical for outdoor, washdown areas, wet locations

IP66: dust-tight, powerful water jets

For high-pressure washdown (food, pharma)

How to choose? Indoor dry area → IP54

Factory floor → IP55

Outdoor → IP65

Washdown / coastal → IP66

When in doubt, go one rating higher than you think you need

It's cheaper than a field failure

At Yiguangnian, we build IP54, IP55, IP65 and IP66 enclosures and can advise on the right rating for your project.