12 Way Heat Pump Consumer Unit with Type B HP RCD + RCBOs (WME12/HP40C)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £80+
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Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping. The WME12/HP40C 12 Way Heat Pump Consumer Unit is a dedicated protection board for inverter-driven heat pump systems. It is supplied in a 304 x 240 x 112mm metal enclosure with Type B...
Pre-wired in the UK and tested before dispatch – allow up to 3 working days for shipping.
The WME12/HP40C 12 Way Heat Pump Consumer Unit is a dedicated protection board for inverter-driven heat pump systems. It is supplied in a 304 x 240 x 112mm metal enclosure with Type B HP RCD protection, Type 2 surge protection, a 16A MCB and 2 x 16A RCBOs.
Installer Note: This 12 way model gives more enclosure space than the 8 way variants while keeping the heat pump-specific Type B HP RCD and Type 2 SPD protection in one pre-wired board.
Why Choose the 12-Way Version?
The WME12/HP40C offers the same pre-fitted protection devices as the 8-way but with extra DIN space. This makes it ideal for larger domestic or light commercial projects, or where spare capacity is required for future circuits. For compact installs, see the 8-way version.
Key Features
- Heat pump ready: built for inverter-driven heat pump installations
- Factory-fitted protection: Type B HP RCD, Type 2 SPD, 16A MCB and 2 x 16A RCBOs
- Larger enclosure: 304 x 240 x 112mm metal 12 way format
- Pre-wired build: assembled for quicker, cleaner site setup
- Part of the Whitecliffe heat pump range: available in compact and custom-build variants
Variant Comparison
| Variant | Configuration | Best For |
|---|---|---|
| WME08/HP40C (8-Way) | 8-way board with 40A Type B HP RCD, 16A C-curve MCBs and Type 2 SPD 232 × 240 × 112mm enclosure |
Standard dedicated heat pump protection in a compact 8-way format |
| WME08/HPR40C (8-Way RCBO Variant) | 8-way board with 40A Type B HP RCD, 1 x 16A C-curve MCB, 2 x 16A RCBOs and Type 2 SPD 232 × 240 × 112mm enclosure |
Installations needing extra outgoing circuit protection within the same compact enclosure |
| WME12/HP40C (12-Way – This Product) | 12-way board with 40A Type B HP RCD, 16A C-curve MCBs and Type 2 SPD 304 × 240 × 112mm enclosure |
Larger installs or where spare ways are needed for future expansion |
Is this board compliant for heat pump installs under the 18th Edition?
Yes – it includes a Type B RCD and Type 2 SPD, both required for inverter-driven loads such as air and ground source heat pumps.
Why choose the 12-way version?
It provides the same pre-fitted devices as the 8-way but with extra DIN space. This is ideal for future expansion with RCBOs or MCBs.
Does it come with spare ways ready to use?
Yes – the 12-way design allows you to add outgoing protection devices without replacing the board. This makes it suitable for larger domestic or light commercial projects.
How quickly can it be delivered?
Each board is built to order in the UK and normally dispatched within 3 working days. Supplied with a 2-year warranty.
| Product Code | WME12/HP40C |
| Product Type | Heat Pump Consumer Unit |
| Enclosure Size | 12 Way |
| Dimensions | 304 x 240 x 112mm |
| RCD | Type B HP RCD, 40A |
| MCB | 16A MCB |
| RCBOs | 2 x 16A RCBOs |
| SPD | Integrated Type 2 Surge Protection Device |
| Enclosure Material | Metal |
| Build Type | Factory Assembled & Pre-Wired |
This unit is pre-wired to order and must be installed by a qualified electrician. It is designed to simplify compliant protection for heat pump circuits requiring Type B RCD and SPD integration.
- Mount securely on a dry, internal wall using enclosure fixings
- Use rear or side knockouts for flexible cable entry
- Ensure correct earthing and SPD bonding as per BS 7671
- Leave spare ways for expansion circuits as planned
