Main Switch Consumer Unit – WME04/MS100 (4 Module, 100A)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WME04/MS100 Main Switch Consumer Unit is a compact 4-module metal enclosure supplied with a 100A main switch incomer. Designed for small domestic installs, garages, and outbuildings, it provides 2 usable ways ready for population with MCBs or RCBOs. Finished in white powder-coated steel, with raised DIN rails and multiple...
The WME04/MS100 Main Switch Consumer Unit is a compact 4-module metal enclosure supplied with a 100A main switch incomer. Designed for small domestic installs, garages, and outbuildings, it provides 2 usable ways ready for population with MCBs or RCBOs. Finished in white powder-coated steel, with raised DIN rails and multiple knockouts for flexible cable entry, it’s a simple but fully compliant base board.
Installer Tip: For small outbuildings or garage installs where only a couple of circuits are needed, this 2-way board is the fastest and most cost-effective choice. If you need RCD or SPD protection, see our RCD boards or surge-protected units.
Key Features
- 4-module metal enclosure – 2 usable ways
- 100A main switch – double-pole isolator included
- Compliant: BS7671:2018 (Amendment 2) & BS EN 61439
- Flexible install: knockouts on top, bottom, sides, and rear
- Installer-friendly: raised DIN rail and earth/neutral bars pre-fitted
- Durable finish: powder-coated steel enclosure
Compare Main Switch Consumer Unit Variants
| Model | Modules | Usable Ways | Incomer | Dimensions (mm) |
|---|---|---|---|---|
| WME04/MS100 (This Product) | 4 | 2 | 100A Main Switch | 160 × 240 × 112 |
| WME06/MS100 | 6 | 4 | 100A Main Switch | 160 × 240 × 112 |
| WME08/MS100 | 8 | 6 | 100A Main Switch | 200 × 240 × 112 |
| WME10/MS100 | 10 | 8 | 100A Main Switch | 216 × 240 × 112 |
| WME12/MS100 | 12 | 10 | 100A Main Switch | 232 × 240 × 112 |
| WME14/MS100 | 14 | 12 | 100A Main Switch | 304 × 240 × 112 |
| WME16/MS100 | 16 | 14 | 100A Main Switch | 340 × 240 × 112 |
| WME18/MS100 | 18 | 16 | 100A Main Switch | 376 × 240 × 112 |
| WME22/MS100 | 22 | 20 | 100A Main Switch | 400 × 240 × 112 |
Does this board come with breakers?
No – it’s supplied with a 100A main switch incomer. Add MCBs or RCBOs based on your circuit design.
What’s the typical use case?
Smaller installs such as garages, sheds, or outbuildings where only a couple of circuits are required.
Are these boards compliant with UK regs?
Yes – they are Amendment 2 compliant (BS7671:2018+A2:2022) and built to BS EN 61439 standards.
Do they include earth and neutral bars?
Yes – each unit is supplied with neutral and earth terminal bars, plus a neutral cable and pin-style busbar.
- SKU: WME04/MS100
- Incomer: 100A main switch (non-RCD)
- Modules: 4
- Usable Ways: 2
- Construction: Steel, powder-coated finish
- Mounting: Surface mount with raised DIN rail
- Cable Entry: Multiple circular knockouts (25/32mm top/bottom, 40mm sides/rear)
- Earth & Neutral: Supplied with bars and cables
- Compliance: BS EN 61439; BS7671:2018 (Amendment 2)
- Dimensions (WxHxD): 160 × 240 × 112 mm
These units are supplied with a pre-fitted 100A main switch but no protective devices. Final circuit population must be completed by a qualified electrician.
- Mount securely on a flat surface with space for future inspection
- Use knockouts with glands/bushes to maintain enclosure integrity
- Fit MCBs or RCBOs according to your circuit design
- Verify bonding and earth continuity before energising
