EV Connection Unit – 100A Main Switch + Surge Protection + 40A MCB (WEVCU40BSP)
18th Ed. Compliant
2-Year Warranty
UK Stock
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The WEVCU40BSP is a pre-wired EV connection unit designed to provide local isolation, surge protection, and overcurrent protection for EV charge point circuits drawing up to 40A. Built into a compact 5-way IP40 metal enclosure, it includes a 100A double-pole main switch, Type 2 SPD, and 40A MCB, offering a...
The WEVCU40BSP is a pre-wired EV connection unit designed to provide local isolation, surge protection, and overcurrent protection for EV charge point circuits drawing up to 40A. Built into a compact 5-way IP40 metal enclosure, it includes a 100A double-pole main switch, Type 2 SPD, and 40A MCB, offering a fast, compliant, and professional installation solution.
Ideal for higher-capacity single-phase EV chargers (typically 9.6kW), this board ensures compliance with BS 7671:2018 Amendment 2 while protecting both the charger and supply from transient voltage spikes and overloads. The result: simplified wiring, reduced install time, and full confidence in 18th Edition conformity.
Installer Tip: On 40A EV circuits, confirm that cable sizing and protective devices are correctly coordinated. BS 7671 Section 433 requires protective devices to match the cable’s current-carrying capacity.
- Pre-wired 5-module metal enclosure – ready to fit
- Includes 100A double-pole main isolator switch
- Integrated Type 2 SPD for transient voltage protection
- 40A MCB (C Curve) for overload and short-circuit protection
- Compact IP40 steel body for indoor installation
- Surface-mount design with protective front cover
- Suitable for TN-S and TT earthing systems
| Part Code | Description | Included Components |
|---|---|---|
| WEVCU20BSP | EV Connection Unit – 100A Main Switch + Surge Protection + 20A MCB | Main Switch (100A DP) + Type 2 SPD + 20A MCB |
| WEVCU32BSP | EV Connection Unit – 100A Main Switch + Surge Protection + 32A MCB | Main Switch (100A DP) + Type 2 SPD + 32A MCB |
| WEVCU40BSP | EV Connection Unit – 100A Main Switch + Surge Protection + 40A MCB | Main Switch (100A DP) + Type 2 SPD + 40A MCB |
The WEVCU40BSP is the highest-rated single-phase model in the WEVCU BSP range, delivering everything you need for surge, overload, and isolation in one pre-wired, regulation-ready package. It’s designed to save time on site and keep EV charger installs BS 7671 Amendment 2 compliant.
Does the WEVCU40BSP include surge protection?
Yes. It has a built-in Type 2 SPD to protect the EV charger and supply from transient voltage surges.
Is it suitable for higher-rated EV chargers?
Yes. The 40A MCB supports larger single-phase chargers, typically up to 9.6kW.
Do I need a separate isolator?
No. The 100A main switch provides full local isolation as required by the Wiring Regulations.
Is it pre-wired and ready to install?
Yes. All internal connections are pre-fitted. Only supply and load terminations are required.
Can it be installed outdoors?
No. The WEVCU40BSP is IP40 rated and must be installed indoors in a dry environment.
- Enclosure: 5-way IP40 metal consumer unit
- Dimensions (W × H × D): 175 × 110 × 91 mm
- Main Switch: 100A double-pole isolator
- MCB: 40A, C Curve
- Surge Protection: Type 2 SPD (L–N)
- Voltage: 230V AC
- Frequency: 50Hz
- Mounting: Surface-mounted
- IP Rating: IP40 (indoor use)
- Earthing System: TN-S, TT
- Compliance: BS EN 61439-3, BS EN 61009, BS 7671 (18th Edition)
Install only by qualified electricians familiar with EV charging systems. The unit must be securely fixed to a solid surface and connected using appropriately rated cable and glands. Always confirm the circuit’s design current and verify that cable sizing meets BS 7671 Table 4D5 requirements for single-phase installations.
- Mount close to the EV charge point for easy isolation
- Keep SPD earth and bonding conductors short and direct
- Ensure terminal torque values are met before energising
- Use only in dry, ventilated indoor environments (IP40 rated)
- Label the circuit clearly to identify EV supply isolation point
