PME Fault Detection Devices
Our PME fault detection units (also called PEN fault protection devices) are designed for EV chargers, outdoor supplies, and PME electrical systems. They monitor the supply and instantly disconnect if a PEN fault is detected, preventing dangerous touch voltages on exposed metalwork. Every unit is fully 18th Edition Amendment 2 compliant and trusted by installers across the UK.
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Whether you’re wiring a domestic EV charger, protecting a commercial car park installation, or setting up outdoor supplies like heat pumps and garden distribution boards, PME detection provides the required disconnection protection without needing a separate earth rod.
- EV ready – essential for car chargers on PME/TN-C-S supplies
- Single & three-phase devices – flexible options for all installs
- Built-in SPD protection – available on selected consumer units (e.g. 8-Way PME Metal Consumer Unit)
- Fast install – compact, pre-tested units designed for electricians
Browse our range of PME detection devices, or explore EV consumer units with integrated PEN fault protection. For delivery info see our shipping page or returns policy.
3 Phase PME Fault Detection Unit 40RSP (WARB5100C/PME40RSP)
£133.75
Pre-wired in the UK and built to order – allow up to 3 working days for dispatch. The WARB5100C/PME40RSP is the all-in-one 3 Phase PME Fault Detection Unit. It combines a 100A MCB main switch, integrated PME relay, a 40A Type A RCBO, and a...
PME Consumer Unit – 40A MCB, IP65 (WPKPME08/C40)
£88.40
The WPKPME08/C40 is an IP65-rated PME consumer unit pre-fitted with a 40A MCB and integrated PME fault detection relays. It removes the need for an earth rod in EV charger installations by isolating live, neutral, and earth conductors if a PME or PEN fault is...
PME Fault Detection Consumer Unit – 4 Pole 63A RCBO with SPD, Load Balancing & kWh Meter (WMEPME12/LBK)
£167.10
The WMEPME12/LBK PME Fault Detection Consumer Unit is the largest model in the range, a 12-module steel enclosure combining a 4 Pole 63A Type A RCBO, Type 2 SPD, PME load balancing relay, and an integrated kWh meter. It provides full PEN fault detection, surge...
PME Fault Detection Consumer Unit – 4 Pole 63A RCBO with SPD (WMEPME10/SP)
£131.75
The WMEPME10/SP PME Fault Detection Consumer Unit is a larger 10-module metal enclosure fitted with a 4 Pole 63A Type A RCBO and an integrated Type 2 Surge Protection Device (SPD). It provides full PME/PEN fault detection, automatically disconnecting Live, Neutral, and Earth within 5...
PME Fault Detection Consumer Unit – 4 Pole 63A RCBO with SPD (WMEPME08/SP)
£104.98
The WMEPME08/SP PME Fault Detection Consumer Unit is an 8-module metal board combining a 4 Pole 63A Type A RCBO with a Type 2 Surge Protection Device (SPD). It delivers full PME/PEN fault monitoring and automatic disconnection of Live, Neutral, and Earth within 5 seconds...
Why PME Fault Detection Matters
PME (Protective Multiple Earthing) systems are common in the UK, but they carry a unique risk: if the PEN conductor fails, exposed metal parts can become live. Standard RCDs and MCBs won’t detect this fault – which is why a dedicated PME fault detection device is now a requirement for EV charger installs under BS 7671.
Key Applications
- EV charging points – meets IET Wiring Regulations without an earth rod
- Outdoor circuits – protects supplies to garages, outbuildings, or garden lighting
- Heat pumps & renewables – ensures safe PME connection for inverter-driven loads
- Commercial sites – car parks, depots, and industrial PME-fed systems
Trusted Supply & Compliance
All PME detection devices supplied by Power & Data UK are UK-tested, BS EN certified, and backed by full manufacturer warranties. Many models combine PEN fault protection with Type 2 SPD surge protection, saving space and install time.
Example: IP65 PME Fault Detection Unit with Load Balancing.
FAQs
Do I need a separate earth rod with PME protection?
No – PME detection devices are designed to disconnect safely without additional earth rods, provided they are installed correctly under BS 7671.
What’s the difference between PME and PEN fault protection?
They refer to the same issue: detecting a broken PEN conductor on TN-C-S supplies. The device cuts off power to prevent dangerous voltages.
Are PME devices mandatory for EV chargers?
Yes – where the supply is PME and no earth rod is installed, a certified PEN fault detection device or consumer unit must be used.
Why Buy From Power & Data UK?
We stock a wide range of PME detection units – from compact standalone devices to EV-ready boards with integrated protection. All come with next-day delivery options, manufacturer warranties, and easy returns support.