Outdoor IP55 Enclosure: Everything You Need to Know

In telecommunication, electrical, and industrial projects, selecting the right enclosure rating is one of the key factors of system reliability. The correct IP classification directly affects the stable operation of installed equipment. One of the most widely used protection levels is IP55. In this article, we explain what an IP55 rating is, how protection against dust and water is achieved, and which design features allow an IP55 enclosure to withstand outdoor and industrial environments. We will also clarify when IP55 is sufficient — and in which cases you may need to consider a higher protection class.

What is an IP55 rating in outdoor cabinets?

The IP rating on enclosures is an international protection standard that indicates how well the cabinet is protected against two factors: the ingress of dust or solid particles, and the ingress of water. 

The IP55 marking includes two digits that determine the nature and intensity of the enclosure’s protection against external influences. The first digit “5” means that the cabinet is protected against dust to a level that prevents particles from interfering with the operation of telecom, electrical, or industrial equipment. The enclosure is not fully dust-tight, but the amount of dust that may enter is not harmful.

The second “5” indicates that the body can withstand the effects of water jets coming from any direction. This means that an IP55 outdoor cabinet can operate safely during rain, splashes, or routine external washing, making it suitable for most outdoor telecom and electrical installations.

If you need a broader explanation of all IP ratings — from basic indoor protection to fully waterproof industrial enclosures — you can read our detailed guide with a complete IP classification table

Can IP55 enclosures be used outdoors?

Yes, IP55 enclosures are appropriate for street use. They are designed to handle rain, splashes, wind-driven moisture, and general outdoor exposure within their declared operating limits. IPCOM-Group cabinets operate reliably in environments with temperatures from –40°C to +40°C and up to 90% air humidity, which makes them suitable for most standard climate zones.

However, in tropical climates or coastal areas, it is recommended to use more tightly sealed enclosures with a higher IP protection rating.

What equipment is installed in an IP55 outdoor cabinet?

In practice, IP55 outdoor cabinets are used to house telecom, networking, power, and industrial control equipment, including:

• Telecommunication devices such as OLT/ONU units, switches, media converters, and fiber distribution components.
• Networking hardware, including aggregation switches, and customer-access equipment.
• Radio and wireless systems such as point-to-point radios, small-cell modules, and wireless access points.
• Power equipment — rectifiers, DC distribution modules, power supplies, and UPS units.
• Battery packs .
• Industrial automation components, including SCADA panels,PLCs,  remote I/O units, and monitoring controllers.
• NVRs, PoE switches, camera power modules, and communication hubs.

Typical design features of IP55 enclosure 

IP55 outdoor cabinets usually include the following construction features:

• Sealed doors with compression gaskets to prevent dust and moisture ingress.
• Secure locking mechanism that ensures consistent pressure on the door seal.
• Protected ventilation openings with filters or weatherproof louvers.
• IP-rated cable glands for sealed and safe cable entry.
• Welded, gap-free construction for structural tightness.
• Galvanized or stainless-steel housing for corrosion resistance.
• Polymer powder coating for UV and weather protection.
• Ventilation or active cooling systems, such as fans or AC units.
• Temperature and humidity sensors for internal monitoring.
• Vandal-resistant design with reinforced panels.
• 10- or 19-inch mounting frame used in IP55 rack cabinets.

Conclusion

IP55 enclosures offer a balanced level of protection for outdoor telecom, electrical, and industrial equipment, providing reliable performance across most climate zones. When properly selected and equipped, they ensure long-term operational stability even in demanding conditions.

If you are looking for robust and well-engineered solutions, you can explore our range of IP55 rack cabinets and outdoor enclosures designed for professional telecommunications and industrial applications.