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Junction unit for underfloor installation duct flush floor open

Junction units for underfloor installation duct systems, also known as floor boxes, floor outlets, or flush floor service fittings, are designed to provide a concealed yet accessible point for electrical and data connections within raised access floors or concrete slabs. These units are typically constructed from galvanized steel or high-impact ...

Junction units for underfloor installation duct systems, also known as floor boxes, floor outlets, or flush floor service fittings, are designed to provide a concealed yet accessible point for electrical and data connections within raised access floors or concrete slabs. These units are typically constructed from galvanized steel or high-impact polycarbonate, offering IP protection ratings from IP20 to IP54 depending on the lid seal and application. They accommodate multiple module configurations for power sockets (e.g., 2P+E, Schuko, or NEMA), RJ45 data jacks, HDMI, and USB ports, with amperage ratings up to 16A or 20A at 230V/400V AC. The units feature hinged or screw-fixed lids, often with a brushed stainless steel or brass finish, and are designed for integration with underfloor trunking systems of varying depths (50mm to 150mm). Key technical parameters include the number of compartments (single, double, or triple), cable entry points with grommets, and compatibility with floor coverings like carpet, tile, or wood.

These junction units are primarily deployed in commercial office buildings, data centers, conference rooms, and educational facilities where flexible workspace layouts require power and data points to be distributed across open floor areas. They are installed within underfloor duct systems or directly into concrete screeds, allowing for easy reconfiguration of furniture layouts without the need for surface-mounted trunking. In industrial settings, they are used in clean rooms, laboratories, and control rooms where floor-level connectivity is essential for machinery or workstations. The units support both power distribution (typically 230V single-phase or 400V three-phase) and low-voltage data networks (Cat6a, Cat7, or fiber optic), making them ideal for modern smart building infrastructure.

Within this category, key subcategories include single-compartment floor boxes (e.g., models with 1x power module and 1x data module), multi-compartment units (e.g., 3x power + 2x data), and adjustable-depth units for varying slab thicknesses. Common article codes follow patterns like "FB-2P-16A" for a two-power-outlet floor box rated at 16A, or "FDU-3C-54" for a three-compartment underfloor duct unit with IP54 protection. Other variants include flush-mount covers with pop-up mechanisms, recessed lids for tile integration, and units with integrated cable management trays. Specific models from leading manufacturers often include the "Mita FB-200" series or "Legrand FLOORBOX" range, but generic codes like "JUNC-DF-4M" (junction unit, dual-flush, 4 modules) are also common.

Partnering with Electric Automation Network ensures access to a comprehensive inventory of junction units for underfloor installation, with real-time pricing and stock availability across all major brands. Our engineering team provides technical support for selecting the correct IP rating, module configuration, and floor compatibility for your project. We offer express worldwide shipping, with most orders dispatched within 24 hours, and provide detailed technical datasheets and CAD drawings for each unit. Whether you need a standard flush floor box or a custom multi-compartment solution, our specialists ensure seamless integration into your electrical infrastructure.

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Manufacturer Code Reference Catalog Number Description Delivery Price

7403831

OKB AE 25085 ON

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External corner with brush bar, 424x424x87, Steel, St

External corner, without height adjustment unit. Ready-to-mount external corner, consisting of a trunking base, two lids, height-adjustable side profiles and brush bar arranged on the wall side for cable alignment. The scope of delivery contains one lid butt seal and a connector.For height adjustment five levelling units are required.

 		3 View Availability View Price

7403836

OKB TS 25085 ON

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T-piece with brush bar, Steel, St

 		3 View Availability View Price

7423950

OKA-G20040150FBL

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Branch, left for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Left derivation parts set OKA-G20040150FBL for OKA-G and OKA-W Steel, St galvanized strip, DIN EN 10346

Set of parts for angular fork to the left, height 40-150 mm. To make a 90° channel bypass to the left during the work. With all the necessary parts for assembly. Suitable for OKA-G and OKA-W channels.

 		3 View Availability View Price

7423952

OKA-G30040150FBL

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Branch, left for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to left, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7423954

OKA-G40040150FBL

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Branch, left for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Left derivation parts set OKA-G40040150FBL for OKA-G and OKA-W Steel, St galvanized strip, DIN EN 10346

Set of parts for angular fork to the left, height 40-150 mm. To make a 90° channel bypass to the left during the work. With all the necessary parts for assembly. Suitable for OKA-G and OKA-W channels.

 		3 View Availability View Price

7423956

OKA-G50040150FBL

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Branch, left for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to left, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7423958

OKA-G60040150FBL

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Branch, left for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to left, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7423970

OKA-G20040150FBR

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Branch, right for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to right, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7423972

OKA-G30040150FBR

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Branch, right for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

OKA-G30040150FBR right-hand derivation parts set for OKA-G and OKA-W Steel, St galvanized strip, DIN EN 10346

Set of parts for angular fork to the right, height 40-150 mm. To make a channel derivation during the work as a 90° curve to the right. With all the necessary parts for assembly. Suitable for OKA-G and OKA-W channels.

 		3 View Availability View Price

7423974

OKA-G40040150FBR

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Branch, right for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to right, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7423976

OKA-G50040150FBR

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Branch, right for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

OKA-G50040150FBR right-hand derivation parts set for OKA-G and OKA-W Steel, St galvanized strip, DIN EN 10346

Set of parts for angular fork to the right, height 40-150 mm. To make a channel derivation during the work as a 90° curve to the right. With all the necessary parts for assembly. Suitable for OKA-G and OKA-W channels.

 		3 View Availability View Price

7423978

OKA-G60040150FBR

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Branch, right for OKA-G and OKA-W, Strip-galvanised, DIN EN 10147, Steel, St

Construction set for 90° angle to right, height 40−150 mm. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		3 View Availability View Price

7424821

OKA FB2 TX

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T and intersection fitting set for OKA-G and OKA-W, Die-cast zinc, Zn

Construction set for trunking T branch and intersection. For the construction-side creation of a trunking junction as a 90° angle, T-piece or crossing. A flushfloor end cover is also required for the creation of a 90° angle (order separately). Suitable for the OKA-G and OKA-W trunking systems.

 		2 View Availability View Price

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