Heat Pump Consumer Unit 12 Way (WME12/HP40C)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping. The WME08/HP40C Heat Pump Consumer Unit is a dedicated protection board for inverter-driven heat pump systems. It comes pre-fitted with a 40A Type B RCD, a 40A Type C MCB, and a 2-pole...
Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.
The WME08/HP40C Heat Pump Consumer Unit is a dedicated protection board for inverter-driven heat pump systems. It comes pre-fitted with a 40A Type B RCD, a 40A Type C MCB, and a 2-pole Type 2 SPD, giving full compliance with BS 7671:2018+A2:2022. This ensures both surge protection and correct RCD specification for renewable installs.
Installer Tip: A Type B RCD is mandatory for inverter-driven heat pumps. Standard Type A devices may not detect smooth DC leakage and could leave the system unprotected.
Why Choose the 8-Way Version?
The WME08/HP40C offers all the required pre-fitted protection devices in a compact footprint. With 8 usable ways, it’s the ideal choice for smaller domestic installs or where board space is limited. For larger projects, see the 12-way version.
Key Features
- Factory-fitted devices: 40A Type B RCD, 40A Type C 10kA MCB, 2P Type 2 SPD
- Compact size: 232 × 240 × 112mm enclosure
- Expansion ready: spare DIN space for future RCBOs or MCBs
- Compliant: BS 7671:2018+A2:2022 renewable regulations
- Durable build: white powder-coated steel, surface mount with knockouts
Variant Comparison
| Variant | Configuration | Best For |
|---|---|---|
| WME08/HP40C (8-Way – This Product) | Pre-fitted with 40A Type B RCD, 40A Type C MCB, 2P Type 2 SPD 232 × 240 × 112mm enclosure |
Compact installs with limited circuits, small domestic setups |
| WME12/HP40C (12-Way) | Same pre-fitted devices with extra DIN space 304 × 240 × 112mm enclosure |
Larger installs or where spare ways are needed for future RCBOs/MCBs |
Is this board compliant for heat pump installs under the 18th Edition?
Yes. It includes a Type B RCD and a Type 2 SPD, both required for inverter-driven loads such as heat pumps. For standalone installs, see our Heat Pump RCD.
What’s the difference between the 8-way and 12-way versions?
The devices supplied are the same. The 12-way simply provides more DIN space for adding future RCBOs or MCBs.
Can I add RCBOs to this board?
Yes. Spare DIN ways are included for adding outgoing protection devices. For nuisance-trip resistance, see our High Immunity RCBOs.
How quickly can this be delivered?
Each unit is built to order and dispatched within 3 working days. For in-stock options, see our 6 Way Consumer Units.
| Product Code | WME08/HP40C |
| MCB | 40A, Type C, 10kA |
| RCD | 40A, Type B, High Immunity |
| SPD | Type 2, 2-Pole, 20kA/40kA |
| Enclosure | White steel, IP-rated, DIN rail with knockouts |
| Mounting | Surface-mounted |
| Standards | BS7671:2018+A2:2022, BS EN 61009, BS EN 61643-11 |
This board is supplied pre-wired and must be installed by a qualified electrician. It simplifies compliant protection for heat pump circuits requiring Type B RCD and SPD integration.
- Mount securely on a dry, internal surface using standard fixings
- Use rear or side knockouts for incoming and outgoing cables
- Ensure correct earthing and SPD bonding as per BS 7671
- Do not modify pre-wiring – contact us for custom builds if needed
