IP40 Metal Garage Units (RCD Incomer) WMGU04/632
£32.15
£64.33
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
Secure Payments With
The IP40 Metal Garage Unit is a compact, all-metal enclosure designed for garages, sheds, and outbuildings. Each unit comes pre-assembled with a 63A / 30mA Type A RCD incomer and two B-curve MCBs, giving safe and compliant circuit protection under the 18th Edition wiring regulations. Built in the UK, this...
The IP40 Metal Garage Unit is a compact, all-metal enclosure designed for garages, sheds, and outbuildings. Each unit comes pre-assembled with a 63A / 30mA Type A RCD incomer and two B-curve MCBs, giving safe and compliant circuit protection under the 18th Edition wiring regulations.
Built in the UK, this unit includes integrated neutral and earth bars, an earthed drop-down lid, and an IP40 steel case. It’s an ideal choice for powering lighting and socket circuits in small outbuildings.
Available variants:
- WMGU04/616 – 63A RCD with 6A + 16A MCBs (B curve)
- WMGU04/620 – 63A RCD with 6A + 20A MCBs (B curve)
- WMGU04/632 – 63A RCD with 6A + 32A MCBs (B curve)
| Part Code | Incomer | MCBs | Typical Use |
|---|---|---|---|
| WMGU04/616 | 63A / 30mA Type A RCD | 6A + 16A | Lighting + light power/tool circuit |
| WMGU04/620 | 63A / 30mA Type A RCD | 6A + 20A | Lighting + heavier socket/radial circuit |
| WMGU04/632 | 63A / 30mA Type A RCD | 6A + 32A | Lighting + high-load equipment (e.g. welder, compressor) |
Which should I choose? Use the 6A way for lighting, then select 16A / 20A / 32A based on the demand of your socket or equipment circuit. Always confirm against circuit design and protective coordination.
- Supplied pre-wired and assembled for quick installation
- All-metal IP40 construction with earthed drop-down lid
- Neutral and earth bars included
- Fully compliant with BS EN 61439 and BS7671:2018 (Amendment 2)
- Built to order – dispatched within 3 working days
- Dimensions: 130(W) × 258(H) × 110(D) mm
Note: This is the RCD incomer version. If you only need a main switch incomer, see our Main Switch Garage Unit. For additional protection options, browse our RCBOs and Surge Protection Devices.
What’s included in this garage unit?
Each unit is supplied pre-wired with a 63A / 30mA Type A RCD incomer and two B-curve MCBs. Variants are available with 6A + 16A, 6A + 20A, or 6A + 32A MCBs. For alternative configurations, view our full garage consumer unit range.
Is this unit fully compliant with the 18th Edition?
Yes – it meets BS7671:2018 (Amendment 2) and BS EN 61439 standards for garage/outbuilding consumer units. For added compliance on EV or heat pump circuits, consider pairing with a PME Fault Detection Unit or SPD.
Can I use this outdoors?
No – the enclosure is IP40 and must be installed in a dry indoor location such as a garage or workshop. For outdoor installs, use an IP65+ rated weatherproof board.
How long is delivery?
These units are built to order and typically dispatched within 3 working days. UK-stocked with reliable turnaround.
- Incomer: 63A / 30mA Type A RCD
- MCB Variants:
- WMGU04/616 – 6A + 16A (B curve)
- WMGU04/620 – 6A + 20A (B curve)
- WMGU04/632 – 6A + 32A (B curve)
- MCB Curve: B curve (2 modules fitted)
- Construction: Steel enclosure, IP40 rated
- Lid: Earthed drop-down cover
- Bars: Integrated neutral and earth bars
- Dimensions: 130(W) × 258(H) × 110(D) mm
- Standards: BS EN 61439, 18th Edition compliant
Supplied pre-configured with RCD and MCBs for quick fit-out. Final wiring and testing must be carried out by a qualified electrician.
- Allow 3 working days for build and dispatch
- Mount indoors only – IP40 rating
- Confirm correct circuit design current before selecting variant
- Check RCD test button function on commissioning
