4 Way Metal EV Protection Unit – 32A C Curve A-Type RCBO + SPD (WMRC32CSP)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WMRC32CSP is a 4 Way Metal EV Protection Unit equipped with a 32 A C-Curve A-Type RCBO and Type 2 SPD inside a robust steel housing. Designed for commercial and higher inrush EV charger applications, it delivers overload, earth-leakage, and surge protection in one compact, prewired assembly. Installer Tip:...
The WMRC32CSP is a 4 Way Metal EV Protection Unit equipped with a 32 A C-Curve A-Type RCBO and Type 2 SPD inside a robust steel housing. Designed for commercial and higher inrush EV charger applications, it delivers overload, earth-leakage, and surge protection in one compact, prewired assembly.
Installer Tip: Use a C-Curve RCBO when installing chargers with higher inrush currents or motorised load characteristics. It helps prevent nuisance tripping on startup while maintaining full compliance with BS 7671 Amendment 2.
- 4-way steel enclosure with white powder-coated finish (WMRC series)
- 32 A C-Curve A-Type RCBO – high immunity and bi-directional for EV circuits
- Factory-fitted Type 2 SPD – protects sensitive EV electronics from surges
- Fully prewired and labelled for fast installation
- 25 mm & 32 mm knockouts top and bottom for cable routing
- Complies with BS 7671 Amendment 2, IEC 61009, and IEC 61643 standards
- Built to order – dispatched within 3 working days
| Model | RCBO Rating | Curve Type | SPD Type | Ingress Rating | Common Use |
|---|---|---|---|---|---|
| WMRC32BSP | 32 A | B Curve | Type 2 | IP40 (Metal) | Standard domestic EV charger ≤7.4 kW |
| WMRC32CSP | 32 A | C Curve | Type 2 | IP40 (Metal) | Commercial EV charger or higher inrush load |
| WMRC40BSP | 40 A | B Curve | Type 2 | IP40 (Metal) | High-load EV charger ≤9.6 kW |
| WMRC40CSP | 40 A | C Curve | Type 2 | IP40 (Metal) | Heavier-duty or inverter-driven systems |
This 32 A C-Curve model is ideal for commercial or mixed-load EV charger setups where transient inrush currents are common. Fully compliant with BS 7671 and factory-tested for rapid installation and inspection approval.
When should I choose a C-Curve RCBO?
C-Curve RCBOs are better suited for circuits with higher inrush currents — such as commercial EV chargers or inverter-fed systems — reducing unwanted tripping while maintaining protection.
Is this 18th Edition compliant?
Yes — the unit meets Amendment 2 of BS 7671, covering both A-Type RCD protection and surge suppression for EV charger supplies.
Can it be used in domestic setups?
Yes, but it’s primarily intended for chargers or loads with moderate to high startup currents. For standard domestic setups, use the B-Curve version.
What’s the benefit of the bi-directional RCBO?
It detects faults in both current flow directions — essential for EV chargers and renewable systems where energy backfeed can occur.
Is surge protection included?
Yes — each unit includes a factory-fitted Type 2 SPD offering 20 kA/40 kA protection against transient voltages.
- SKU: WMRC32CSP
- Product Type: EV Protection Unit with RCBO and Surge Protection
- Enclosure: 4-way metal, powder-coated white (IP40)
- Cable Entry: 25 mm & 32 mm knockouts (top and bottom)
- RCBO: 2-pole A-Type, bi-directional, high immunity
- Rating: 32 A C Curve | 30 mA RCD
- SPD: Type 2, 2-pole | 20 kA / 40 kA discharge capacity
- Mounting: DIN-rail prewired and labelled
- Standards: BS 7671 (18th Edition), IEC 61009-1, IEC 61643-11
This prewired metal EV protection unit provides overload, earth-leakage, and surge protection for single-phase EV circuits. Installation should be carried out by a qualified electrician under BS 7671.
- Mount enclosure vertically on a solid indoor surface
- Use appropriate fixings for metal housings
- Route cables via 25 mm or 32 mm knockouts
- Ensure earth and neutral connections are secure
- Do not modify internal wiring – this voids warranty
