Distribution box protection level 67

IP67-rated distribution boxes are dust-tight and protected against temporary immersion in water up to 1 meter for 30 minutes.

Understanding IP67

The IP (Ingress Protection) rating is defined by the IEC 60529 standard, which classifies the degree of protection provided by enclosures against solid objects and liquids. The first digit "6" indicates that the enclosure is completely dust-tight, preventing any ingress of dust even under vacuum conditions. The second digit "7" signifies that the enclosure is protected against temporary immersion in water, meaning it can withstand being submerged up to 1 meter for 30 minutes without harmful effects on the internal components .

Testing and Standards

To achieve IP67 certification, a distribution box undergoes rigorous testing: it is fully submerged in water with the lowest point at 1 meter below the surface and the highest point at least 150 mm below the surface for exactly 30 minutes. No water must enter the enclosure in a quantity that could damage the electrical components . Materials such as polyurethane or foam gaskets are commonly used to ensure a reliable seal .

Applications

IP67 distribution boxes are ideal for environments where both dust and water exposure are significant concerns:

• Flood-prone or low-lying areas where temporary water immersion may occur .
• Marine and offshore installations, including shipboard panels and dockside power units .
• Outdoor telecommunications and fiber optic networks, such as mini fiber optic distribution boxes for FTTX deployments .
• Industrial washdown areas, like food and beverage processing plants, where equipment is cleaned with high-pressure water .
• Underground or mining operations where moisture and dust are prevalent .

Material and Design Considerations

IP67 enclosures are typically made from polycarbonate, PC alloys, or sheet steel, often with UV-stable and halogen-free properties. They may include transparent windows for monitoring, heat dissipation features, and EMC shielding for sensitive electronics . Proper gasket design and sealing are critical to maintain the IP67 rating over time.

Summary

An IP67 distribution box provides the highest level of dust protection and robust water resistance suitable for temporary immersion. It is widely used in outdoor, industrial, and harsh environments where both dust and water ingress could compromise electrical systems. Selecting an IP67-rated enclosure ensures reliability, safety, and longevity of electrical and electronic components in challenging conditions .