Hensel FK 0402 Surface-Mounted Fire-Resistant Junction Box E90 IP65 5x2.5mm2

The Hensel FK 0402 is a high-quality surface-mounted junction box engineered specifically for electrical installations that demand fire resistance and circuit integrity. Designed to meet the E90 standard, this junction box ensures that electrical systems remain operational for up to 90 minutes during a fire, which is critical for emergency lighting, fire alarm systems, and smoke extraction equipment. With an IP65 protection rating, the enclosure is effectively protected against dust ingress and water jets, making it suitable for both indoor and outdoor installations in demanding industrial or commercial environments.

Advantages

This junction box offers exceptional reliability through its robust construction and specialized materials designed to withstand extreme thermal stress. By maintaining electrical continuity during fire events, it provides a vital safety layer for critical infrastructure. The surface-mounted design allows for straightforward installation on walls or ceilings, while the generous internal space facilitates easy cable management and connection for 5x2.5mm2 conductors. Its durable build ensures long-term performance, reducing the need for frequent maintenance in harsh conditions.

Suitable for

• Emergency lighting systems
• Fire alarm and detection installations
• Smoke and heat extraction systems
• Critical power supply circuits in public buildings
• Industrial facilities requiring high safety standards

When it may not be suitable

This junction box is not intended for use in environments where the required cable cross-section exceeds 2.5mm2 or where a higher number of conductors is needed. It is also not designed for submerged applications or areas subject to high-pressure water cleaning.

Key specifications

• Fire resistance class: E90
• Protection rating: IP65
• Conductor capacity: 5x2.5mm2
• Mounting type: Surface-mounted
• Dimensions: 104x104x70mm

How to use

Installation should be performed by a qualified electrician in accordance with local fire safety regulations and electrical codes. The box is mounted directly onto the surface using the provided fixing points. Cables should be inserted through the appropriate cable glands to maintain the IP65 rating. Ensure that all connections are tightened securely to the specified torque to prevent overheating and ensure the integrity of the fire-resistant circuit. Once the wiring is complete, the cover must be firmly attached to ensure the enclosure is properly sealed.

What to consider before purchase

• Verify that the E90 fire resistance rating meets your local building code requirements.
• Ensure the 5x2.5mm2 capacity is sufficient for your specific circuit design.
• Check the mounting surface for structural integrity to support the weight of the box and cables.
• Confirm that the IP65 rating is adequate for the intended environmental exposure.

Usage recommendations: Always use certified fire-resistant cables in conjunction with this junction box to ensure the entire circuit maintains its E90 integrity during a fire event.