Bettermann HE 74-L Cavity Wall Junction Box with Membrane Entries and Extra Wiring Space for Wall Depth min 75mm

The Bettermann HE 74-L Cavity Wall Junction Box with Membrane Entries and Extra Wiring Space is a reliable electrical accessory designed for secure cable management in hollow walls. Engineered for professional construction and renovation projects, this junction box provides ample room for electrical connections while ensuring safe and efficient installation. It is specifically built for wall depths of a minimum of 75 mm and supports plate thicknesses from 5 to 35 mm, making it a versatile choice for modern building standards.

Advantages

This cavity wall junction box offers flexible membrane entries that allow for quick and tool-free cable insertion while maintaining a secure seal around the wires. The integrated extra wiring space significantly simplifies the connection process, reducing strain on cables and providing enough room for complex wiring configurations. Constructed to meet professional electrical installation requirements, it ensures long-term safety and durability behind cavity walls.

Suitable for

• Electrical installations in hollow walls and drywalls
• Professional construction and residential renovation projects
• Secure cable management and wire junction routing
• Wall structures with a minimum depth of 75 mm and plate thickness between 5 and 35 mm

When it may not be suitable

This junction box is not designed for solid masonry or concrete walls where cavity installation methods cannot be applied. Additionally, it may not be suitable for wall depths of less than 75 mm or plate thicknesses outside the 5 to 35 mm range.

Key specifications

• Cavity wall junction box design
• Flexible membrane entries for cable insertion
• Extra wiring space for internal connections
• Minimum wall depth requirement of 75 mm
• Compatible with plate thicknesses from 5 to 35 mm

How to use

Prepare the installation opening in the hollow wall according to the dimensions required by the junction box. Insert the cables through the flexible membrane entries into the interior of the box, ensuring the membranes form a snug fit around the cables. Position the junction box securely within the wall cavity, making sure the plate thickness falls within the specified range of 5 to 35 mm. Complete the electrical connections inside the extra wiring space using appropriate terminals and secure the cover plate.

What to consider before purchase

• Verify that the hollow wall has a minimum depth of 75 mm
• Check that the wall plate thickness is between 5 and 35 mm
• Ensure the box dimensions and wiring space match your project requirements

Usage recommendations

Always disconnect the power supply before performing any electrical installation work, and ensure that installation complies with local electrical safety regulations and guidelines.