PME Consumer Unit with Load Balancing & kWh Meter, IP65 (WPEPME12/LBK)

The WPEPME12/LBK is an IP65-rated PME consumer unit combining PEN fault detection, adjustable load balancing, and an integrated kWh meter within a single enclosure. It is designed for consumer unit installations where supply capacity is limited and full compliance with BS 7671:2018 Amendment 2 is required.

By continuously monitoring supply voltage and current, the unit disconnects Live, Neutral, and Earth within 4–5 seconds if a PME or PEN fault is detected, removing the need for an earth rod. The integrated load management relay uses a split-core CT to prevent the EV charger overloading the incoming supply, making it particularly effective on properties running multiple high-demand electrical loads.

Key Features

• PME / PEN fault detection – disconnects Live, Neutral, and Earth within 4–5 seconds
• Integrated load balancing relay – adjustable from 10A to 110A via CT clamp
• Built-in kWh meter – allows monitoring of EV charging energy usage
• 40A Type A RCBO or 100A Main Switch variants – flexible protection options
• IP65-rated enclosure – weatherproof for outdoor installations
• No earth rod required – fully compliant with Amendment 2 PME rules
• Supplied pre-wired for fast, consistent installation
• Manufactured in compliance with BS EN 61439-3 and BS 7671:2018 A2

Compare PME Consumer Unit Variants

• Model: WPEPME12/LBK
• PME Protection: PEN fault detection with full pole disconnection
• Load Management: Adjustable relay, 10A–110A via CT clamp
• Metering: Integrated kWh energy meter
• Incomer Options: 40A Type A RCBO or 100A Main Switch
• Voltage Monitoring: 207V–253V AC
• Response Time: Disconnects within 4–5 seconds on fault
• Short Circuit Rating: 16kA
• Enclosure: IP65-rated plastic
• Modules: 12
• Standards: BS EN 61439-3, BS 7671:2018 Amendment 2
• Certifications: UKCA, CE

This PME consumer unit is supplied pre-wired and must be installed and commissioned by a qualified electrician.

• Mount securely to an external wall or suitable structure
• Fit the split-core CT clamp to the incoming supply cable
• Set load balancing threshold to suit site demand
• Verify PME fault detection and carry out functional testing on commissioning

What does load balancing do in this unit?

The load balancing relay monitors total supply current and limits EV charging when other high-demand appliances are running, preventing nuisance tripping or overload.

Do I still need an earth rod?

No. The unit provides full PME fault detection and disconnects Live, Neutral, and Earth automatically, removing the need for a separate earth electrode.

What is the benefit of the kWh meter?

The integrated meter allows tracking of EV charging energy usage, which is useful for cost monitoring or shared charging locations.

Is this suitable for domestic installations?

Yes. It is commonly used on residential EV charger installs where load management is required and incoming supply capacity is limited.

Can this be installed outdoors?

Yes. The IP65-rated enclosure is weatherproof and suitable for external wall mounting.

Is this unit suitable for EV charger installations?

Yes. This unit is commonly specified for EV charger installations where the charger does not include built-in PME protection and load management is required to prevent supply overload.