Why Choose the ABB 4/4EF21 Fire Protection Extension Frame?
The ABB 4/4EF21, order code 2CPX041085R9999, is a 90-minute fire protection extension frame for double-leaf facing doors within the ABB VF enclosure system. As part of the ABB DESUJ Sub Distribution product group, it provides additional installation depth for compatible fire protection facing doors used in professional indoor electrical distribution installations.
The 4/4EF21 has external dimensions of 1295 mm wide × 1495 mm high × 22 mm deep and internal dimensions of 1065 mm wide × 1265 mm high × 22 mm deep. It is designed for compatible double-leaf facing doors with construction height 4 and field width 4, providing a system-matched accessory for large ABB fire protection distribution assemblies.
The extension frame can be used where an existing electrical distribution assembly projects by more than 20 mm from the wall and additional clearance is required for the facing door. Designed for the ABB 90-minute fire protection system, the 4/4EF21 provides 90-minute fire resistance and functional integrity, A2 non-combustible construction and IP54 protection as part of the appropriate compatible installation.
Key Advantages
- Purpose-designed extension frame for ABB double-leaf fire protection facing doors.
- Provides an additional 22 mm installation depth.
- Suitable where an existing distribution assembly projects more than 20 mm from the wall.
- Large 1295 × 1495 × 22 mm external dimensions.
- Generous 1065 × 1265 × 22 mm internal dimensions.
- Designed for construction height 4 and field width 4.
- 90-minute fire resistance and functional integrity.
- A2 non-combustible building-material classification.
- System-compatible component within the ABB VF fire protection range.
Key Features
- ABB 4/4EF21 fire protection extension frame.
- ABB order code 2CPX041085R9999.
- Designed for double-leaf fire protection facing doors.
- 1295 mm overall width.
- 1495 mm overall height.
- 22 mm overall depth.
- 1065 × 1265 × 22 mm internal dimensions.
- Construction height 4.
- Field width 4.
- 90-minute fire resistance.
- 90-minute functional integrity.
- IP54 degree of protection as part of the compatible system.
- A2 non-combustible building-material classification.
- Designed for indoor installations.
- Part of the ABB VF fire protection series.
- Product weight of approximately 21 kg.
Additional Clearance for ABB Double-Leaf Fire Protection Doors
An extension frame allows a compatible fire protection facing door to be installed where an existing electrical distribution assembly projects further from the wall than the standard installation permits. The ABB 4/4EF21 adds 22 mm of frame depth and is specifically matched to double-leaf facing doors in construction height 4 and field width 4.
With external dimensions of 1295 × 1495 × 22 mm and internal dimensions of 1065 × 1265 × 22 mm, the frame provides a coordinated solution for large ABB fire protection assemblies. It is particularly suitable when an existing distribution board projects by more than 20 mm from the wall and additional clearance is needed to install the compatible protective facing door.
Typical Applications
- ABB fire-protected low-voltage sub-distribution systems.
- Double-leaf fire protection facing-door installations.
- Existing distribution boards projecting more than 20 mm from the wall.
- Large commercial and public-building electrical distribution systems.
- Emergency and safety-related electrical distribution installations.
- Electrical risers and building-services distribution areas.
- Compatible ABB VF indoor fire protection installations.
