CF-EXR Spacing Rings
The Unbranded CF-EXR Extension Rings provide essential depth adjustments for standard circular conduit boxes in professional electrical and networking infrastructures. These components facilitate additional internal volume for cable management within surface-mounted installations. Each unit measures 20mm in depth to accommodate complex conductor terminations and high-density wiring layouts. Engineers utilize these accessories when existing box depth proves insufficient for modern networking requirements. The structural design ensures a flush interface with standard mounting hardware and conduit lids.
Key Features
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Industrial Material Construction
Each ring consists of heavy-duty galvanized steel to provide mechanical protection and long-term durability in commercial environments. -
Standardized Dimensions
- Internal diameter of 60.3mm for universal box compatibility
- Standard 50.8mm mounting centers for M4 screw attachment
- Consistent 20mm depth for predictable spacing calculations
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Environmental Resistance
The hot-dipped galvanized finish prevents oxidation and maintains structural integrity in high-humidity zones. -
Electrical Continuity
- Steel construction supports low-impedance grounding paths
- Compliant with BS EN 61386-21 standards for conduit systems
- Integrated earth terminal points on compatible base boxes
Installers mount these circular spacing components between the conduit box and the lid or accessory plate. The rings maintain the IP rating of the overall system when used with appropriate neoprene gaskets. Additionally, the precise thread pitch of the mounting holes prevents stripping during high-torque installations. These extenders serve as a cost-effective solution for renovation projects where new wall finishes increase the depth of recessed boxes. However, technicians must ensure that the total conductor fill ratio remains within local regulatory limits after installation. The CF-EXR units withstand significant mechanical stress and impact in industrial zones. They support a wide operating temperature range from -5°C to +60°C without deformation. Procurement managers benefit from bulk packaging efficiency with 400 pieces per shipping carton. This high-density packing reduces logistical overhead for large-scale infrastructure deployments. The components remain compatible with all standard M20 threaded conduit fittings and accessories.
Specifications
| Feature | Specification |
|---|---|
| Material | Galvanized Steel |
| Depth | 20mm |
| Internal Diameter | 60.3mm |
| Mounting Centers | 50.8mm |
| Standard Compliance | BS EN 61386-21 / BS 4568 |
| Carton Quantity | 400 Pieces |
What’s in the Box
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Unbranded CF-EXR 20mm Extension Ring
Why Choose CF-EXR Units
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The galvanized coating ensures long-term resistance to atmospheric corrosion in industrial cabling environments.
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Standardized mounting centers allow for rapid integration with existing circular conduit hardware.
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Precision manufacturing guarantees a tight seal when paired with standard lids and gaskets.
Kevin Omollo (verified owner) –
Strong material and fits the standard 20mm conduits without any struggle. Highly recommended for site work.
Peter Njuguna (verified owner) –
It does the job well for extending the box depth. However, be careful with the screws you use; the holes are a bit tight on some of the rings. Once in, it’s solid. Good for the price point but requires a bit of patience during installation.
Josphat Mwangi (verified owner) –
These extension rings saved us on a commercial project in Westlands. The original boxes were buried too deep after the plastering work was finished. The 20mm fit was perfect and the galvanizing is thick enough that you don’t worry about rust in the long run. Good value for unbranded stock.
Sarah Atieno (verified owner) –
Decent quality for the price. I ordered a dozen for a small office renovation. They arrived on time and the threads are clean, which isn’t always the case with unbranded fittings. Only 4 stars because one had a slight burr on the edge, but it was an easy fix for my fundi.
Faith Mutua (verified owner) –
Used these CF-EXR rings for a warehouse wiring job. The galvanizing is consistent across the batch. Much better than trying to hack a solution when the conduit is sitting too far back in the wall. Will buy again for future site work.