Main Switch Consumer Unit – WME22/MS100 (22 Module, 100A)
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
Secure Payments With
The WME22/MS100 Main Switch Consumer Unit is the largest in the range — a 22-module metal enclosure with a 100A main switch incomer. With 20 usable ways, it provides maximum capacity for full domestic rewires, HMOs, or small commercial installations. Built in powder-coated steel and supplied with raised DIN rails,...
The WME22/MS100 Main Switch Consumer Unit is the largest in the range — a 22-module metal enclosure with a 100A main switch incomer. With 20 usable ways, it provides maximum capacity for full domestic rewires, HMOs, or small commercial installations. Built in powder-coated steel and supplied with raised DIN rails, pre-fitted earth/neutral bars, and multiple knockouts, it’s fully compliant and installer-ready.
Installer Tip: A 20-way board ensures future-proofing for even the largest homes or commercial sites, giving ample spare ways for EV chargers, solar PV, or additional circuits.
Key Features
- 22-module metal enclosure – 20 usable ways
- 100A main switch – double-pole isolator included
- Compliance: BS7671:2018 (Amendment 2) & BS EN 61439
- Flexible install: knockouts on top, bottom, sides, and rear
- Installer-friendly: raised DIN rail, earth & neutral bars pre-fitted
- Durable finish: powder-coated steel construction
Compare Main Switch Consumer Unit Variants
| Model | Modules | Usable Ways | Incomer | Dimensions (mm) |
|---|---|---|---|---|
| WME04/MS100 | 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 (This Product) | 22 | 20 | 100A Main Switch | 400 × 240 × 112 |
Does this unit come with breakers?
No – it comes with a 100A main switch incomer only. Add MCBs or RCBOs depending on your installation design.
Who typically uses a 20-way board?
Ideal for large domestic installs, HMOs, or commercial sites with high circuit demand and future expansion requirements.
Is it Amendment 2 compliant?
Yes – fully compliant with BS7671:2018+A2:2022 and built to BS EN 61439 standards.
Does it include earth and neutral bars?
Yes – supplied with pre-fitted earth and neutral bars, plus a busbar.
- SKU: WME22/MS100
- Incomer: 100A main switch (non-RCD)
- Modules: 22
- Usable Ways: 20
- Construction: Powder-coated steel enclosure
- Mounting: Surface mount with raised DIN rail
- Cable Entry: Multiple knockouts (25/32mm top/bottom, 40mm sides/rear)
- Earth & Neutral: Supplied with terminal bars and cables
- Compliance: BS EN 61439; BS7671:2018 (Amendment 2)
- Dimensions (WxHxD): 400 × 240 × 112 mm
The WME22/MS100 is supplied with a pre-fitted 100A main switch but no protective devices. Final population with MCBs/RCBOs must be carried out by a qualified electrician.
- Mount securely on a flat surface with access for future inspection
- Use knockouts with glands/bushes for cable entry
- Fit protective devices (MCBs/RCBOs) as required
- Verify bonding and earth continuity before energising
