3 Way EV RCBO Enclosure – Type A High Immunity 40A Type C (WMEV340C)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WMEV340C is a high-capacity 3-way EV RCBO enclosure designed to protect single-phase EV charger circuits that demand both earth leakage and overload protection. Supplied with a 40A Type A High Immunity RCBO (Type C curve), it offers 30mA AC and 6mA DC fault detection in compliance with BS 7671:2018...
The WMEV340C is a high-capacity 3-way EV RCBO enclosure designed to protect single-phase EV charger circuits that demand both earth leakage and overload protection. Supplied with a 40A Type A High Immunity RCBO (Type C curve), it offers 30mA AC and 6mA DC fault detection in compliance with BS 7671:2018 Amendment 2.
This Type C configuration is suited for EV chargers with higher inrush currents — such as those with internal transformers, switched-mode power supplies, or advanced inverter systems. The compact IP40-rated steel housing makes it ideal for professional installations requiring durability, safety, and flexibility in tight indoor spaces.
Installer Tip: For high inrush EV chargers, Type C curves reduce nuisance tripping. Always confirm charger startup current and ensure circuit design aligns with BS 7671 Regulation 433.1.
- Supplied with 40A Type A High Immunity RCBO (C Curve)
- Detects AC, pulsating DC, and 6mA smooth DC leakage
- 3-module IP40-rated metal enclosure
- Dual overload and residual current protection
- Compatible with PME fault detection and surge devices
- Built to order – typically dispatched within 3 working days
| Part Code | Description | RCBO Rating | Trip Curve |
|---|---|---|---|
| WMEV332B | 3 Way EV RCBO Enclosure – Type A High Immunity 32A Type B | 32A | B |
| WMEV332C | 3 Way EV RCBO Enclosure – Type A High Immunity 32A Type C | 32A | C |
| WMEV340B | 3 Way EV RCBO Enclosure – Type A High Immunity 40A Type B | 40A | B |
| WMEV340C | 3 Way EV RCBO Enclosure – Type A High Immunity 40A Type C | 40A | C |
The WMEV340C completes the WMEV series — combining 40A load handling, 6mA DC protection, and high immunity performance for modern EV charger systems. Compact, compliant, and built for the 18th Edition, it’s the go-to option for higher-demand single-phase EV circuits.
Why use a Type C RCBO for EV chargers?
Type C RCBOs handle higher inrush currents, making them ideal for EV chargers with transformer or inverter-based designs that might trip Type B devices.
Is this enclosure suitable for PME systems?
Yes, when installed with a compliant PEN fault detection device.
Does it include surge protection?
No. Add a surge protection device separately at the distribution point if required by your circuit design.
Is it pre-wired?
No. It’s supplied un-wired for flexibility on site.
Where should it be installed?
Indoors, in a dry and accessible location — such as a garage, plant room, or meter cupboard.
- Model: WMEV340C
- Modules: 3
- Current Rating: 40A
- Trip Curve: C
- Type: A High Immunity RCBO
- Earth Leakage: 30mA AC / 6mA DC
- Protection: Overload & Residual Current
- Enclosure: IP40-rated metal body
- Application: Single-phase EV charging supply
- Compliance: BS EN 61009, BS EN 61439, BS 7671 (18th Edition)
This unit should be installed by a qualified electrician in accordance with BS 7671. It’s ideal for single-phase EV chargers with elevated inrush characteristics or transient loading profiles. Verify all cable and breaker ratings prior to energising.
- Mount securely on a flat wall surface
- Use correct cable glands and ensure enclosure integrity
- Maintain polarity and confirm earth continuity
- Test RCBO trip function before handover
- Install indoors only (IP40 – not weatherproof)
