RCD Upgrade Unit – 40A 2 Module with Seal Screws (WECRC40)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WECRC40 is a compact RCD upgrade unit pre-fitted with a 40A 30mA RCD inside a 2-module plastic enclosure. Designed for retrofitting where existing consumer units lack integrated RCD protection, it provides reliable earth leakage fault protection without requiring a full board replacement. Ideal for domestic circuits, extensions, and small...
The WECRC40 is a compact RCD upgrade unit pre-fitted with a 40A 30mA RCD inside a 2-module plastic enclosure. Designed for retrofitting where existing consumer units lack integrated RCD protection, it provides reliable earth leakage fault protection without requiring a full board replacement.
Ideal for domestic circuits, extensions, and small sub-mains, this unit is quick to install and includes tamper-proof seal screws for compliance. Compact dimensions make it suitable for tight spaces, while surface mounting ensures easy integration into upgrade or add-on applications.
Installer Tip: Choose the 40A model for standard domestic subcircuits. For higher-load installs, step up to the 63A version.
Key Features
- 40A 30mA RCD – earth leakage and fault protection
- 2-module DIN rail enclosure with tamper-proof seal screws
- Compact size – 95 × 145 × 82mm
- Surface mount design – quick wall installation
- Complies with BS EN 61008-1 and BS 7671
Compare RCD Upgrade Units
| Model | Rating | Application |
|---|---|---|
| WECRC40 (This Product) | 40A | Standard domestic circuits |
| WECRC63 | 63A | Higher load domestic / light commercial |
| WECRC80 | 80A | Larger sub-mains |
| WECRC100 | 100A | Main incomer / heavy-duty use |
When should I use an RCD upgrade unit?
Use when an older consumer unit doesn’t have built-in RCD protection, or when extending circuits that require standalone residual current protection.
Is this enclosure weatherproof?
No – it is for indoor use only. For outdoor applications, see our IP65 RCD enclosures.
Can I get different ratings?
Yes – available in 40A, 63A, 80A, and 100A versions to match your system load requirements.
- Model: WECRC40
- Rating: 40A, 30mA RCD
- Enclosure: 2-module plastic case, tamper-proof seal screws
- Mounting: Surface mount, DIN rail inside
- Dimensions: 95mm (W) × 145mm (H) × 82mm (D)
- Voltage: 230V AC
- Standards: BS EN 61008-1, BS 7671
Supplied pre-assembled with RCD fitted. Final wiring and testing must be carried out by a qualified electrician.
- Fix securely to wall or mounting board
- Use correct glands/seals for cable entry
- Wire in line with BS 7671 requirements
- Test RCD trip time after installation
