Live Electrical MMGU40C-SP EV Consumer Unit with RCBO, SPD and Busbar
Live Electrical MMGU40C-SP EV Consumer Unit
The Live Electrical MMGU40C-SP EV Consumer Unit is designed for dedicated electric vehicle charger installations in domestic and commercial settings. It includes a 2 pole 40A C Curve Type A RCBO, built-in surge protection device and pre-installed internal busbar, providing a compact solution for EV charger circuit protection.
This C Curve EV consumer unit is suitable for installations where the charger or circuit design requires a higher inrush current tolerance than a standard B Curve device. Correct selection should always be confirmed by the installer based on the charger specification, circuit design, Zs values and installation conditions.
Live Electrical products are designed and quality controlled by the brand’s UK-based team, with manufacturing carried out under supplier-controlled processes. All electrical work should be carried out by a qualified electrician in accordance with current UK wiring regulations and manufacturer instructions.
Key Features
- Live Electrical MMGU40C-SP EV consumer unit
- 2 pole 40A C Curve Type A RCBO included
- Built-in 20/40kA 1P+N surge protection device
- 4 way configuration
- Pre-installed internal busbar
- Fully enclosed metal housing
- White powder-coated finish, RAL9010
- Drop-down cover with lockable lid
- Top and bottom knockouts for cable entry
- Compact dimensions: 125mm x 183mm x 110mm
- Raised keyholes for wall mounting
What Makes the C Curve RCBO Useful?
The included 40A C Curve Type A RCBO is designed to tolerate higher short-duration inrush currents than a B Curve device. This can be useful for certain EV charger installations where the charger design or load characteristics may otherwise cause unwanted tripping.
However, a C Curve device is not automatically suitable for every installation. The electrician should confirm earth fault loop impedance, cable size, protective device suitability and all relevant installation requirements before fitting the unit.
Best Suited For
- Domestic EV charger installations where C Curve protection is required
- Commercial or office EV charging points
- Dedicated 40A EV charger circuits
- Installations requiring RCBO and surge protection in one enclosure
- Installers looking for a compact Live Electrical EV consumer unit
B Curve or C Curve EV Protection?
Not sure whether a B Curve or C Curve RCBO is the better option for your installation? Read our guide: B Curve vs C Curve | 32A vs 40A Explained.
If you need an outdoor-rated option, see the Live Electrical LEV440SP-P IP65 EV consumer unit with 40A C Curve RCBO and SPD.
Complete the EV Charger Setup
When planning the full EV charging installation, this unit may be used alongside suitable cable, fixings and the charger itself. For charger options, browse our Ohme charger range, including Ohme Home Pro and Ohme ePod smart EV chargers.
For other board options, visit our main consumer units category. You may also need suitable EV cables, EV cable clips and EV circuit protection, depending on the installation design.
FAQs
Is the Live Electrical MMGU40C-SP suitable for EV charger installations?
Yes, the Live Electrical MMGU40C-SP is designed for dedicated EV charger circuit protection where a 40A C Curve Type A RCBO and surge protection are suitable for the installation design.
What is the difference between B Curve and C Curve?
A C Curve RCBO is designed to tolerate higher short-duration inrush current than a B Curve device. The correct curve should be selected by the installer based on the charger, circuit design and test results.
Does this EV consumer unit include an SPD?
Yes. The unit includes a built-in 20/40kA 1P+N surge protection device.
Does this unit include a busbar?
Yes. The Live Electrical MMGU40C-SP is supplied with a pre-installed internal busbar.
Can I use 6mm cable with this unit?
The correct cable size depends on the installation method, cable route, design current, protective device, voltage drop and other site conditions. Cable sizing should always be confirmed by a qualified electrician.
Who should install this EV consumer unit?
This EV consumer unit should be selected, installed and tested by a qualified electrician in accordance with current UK wiring regulations, the EV charger manufacturer’s instructions and the requirements of the property.
Installation Notes
The Live Electrical MMGU40C-SP EV Consumer Unit should be selected as part of the full EV charger installation design. The installer should confirm the correct RCBO rating, tripping curve, cable size, earthing arrangement, surge protection requirements and enclosure suitability before installation.
