IP40 Metal Garage Unit – 100A Main Switch + 6A & 16A MCB (WMMS/616)
£25.50
£50.96
18th Ed. Compliant
2-Year Warranty
UK Stock
Free Delivery £30+
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The WMMS/616 is a compact IP40 metal garage consumer unit supplied with a 100A main switch incomer and pre-fitted 6A and 16A B-curve MCBs. It’s designed for garages, workshops and outbuildings where you want a dedicated lighting circuit alongside a light power or tool circuit, fully in line with BS...
The WMMS/616 is a compact IP40 metal garage consumer unit supplied with a 100A main switch incomer and pre-fitted 6A and 16A B-curve MCBs. It’s designed for garages, workshops and outbuildings where you want a dedicated lighting circuit alongside a light power or tool circuit, fully in line with BS 7671:2018 Amendment 2.
Use the 6A way for lighting and the 16A way for a small power radial or socket circuit, fed from a suitable sub-main. The steel enclosure, integrated neutral/earth bars and earthed drop-down lid make it a practical, installer-friendly choice for domestic and light commercial sites.
Installer Tip: Treat this unit as a small distribution board on a sub-main. Confirm design current, Zs and disconnection times for both MCBs, and ensure upstream protection is coordinated with the 100A main switch and cable size.
- IP40 all-metal garage unit with earthed drop-down lid
- 100A double-pole main switch for local isolation
- Pre-fitted 6A and 16A B-curve MCBs – ideal for lighting + light power/tool circuits
- Integrated neutral and earth bars for fast, tidy terminations
- Surface-mount steel enclosure – compact footprint for tight garage spaces
- Built to order in the UK – typically dispatched within 3 working days
- Suitable for use as a garage or outbuilding board on compliant sub-main circuits
| Part Code | Incomer | MCB Set | Typical Use |
|---|---|---|---|
| WMMS/616 | 100A Main Switch | 6A + 16A (B) | Lighting + light power/tool circuit |
| WMMS/620 | 100A Main Switch | 6A + 20A (B) | Lighting + heavier socket or radial circuit |
| WMMS/632 | 100A Main Switch | 6A + 32A (B) | Lighting + high-load circuit (e.g. compressor, welder) |
The WMMS/616 gives you a simple, regulation-ready way to split out garage lighting and light power circuits in one metal garage unit. For other MCB combinations or additional ways, view our wider consumer unit range or speak to your designer about alternative board options.
What’s the difference between WMMS/616, WMMS/620 and WMMS/632?
The main difference is the outgoing MCB ratings. WMMS/616 includes 6A + 16A B-curve MCBs, WMMS/620 includes 6A + 20A, and WMMS/632 includes 6A + 32A. All variants use the same IP40 metal enclosure and 100A main switch incomer. For other board sizes, view our wider consumer unit range.
Does this unit include RCD or RCBO protection?
No. This is the main switch version only. If earth leakage protection is required for your circuits, choose one of our RCD incomer garage units or provide protection with suitable RCBOs elsewhere in the system.
Is the WMMS/616 suitable for outdoor use?
No. The enclosure is rated IP40 and must be installed in a dry indoor environment such as inside a garage or outbuilding. For external locations, use our weatherproof IP65+ enclosures and accessories.
How quickly can I get it?
Units are built to order and typically dispatched within 3 working days, subject to stock. All products are held and assembled in the UK for reliable turnaround.
Can I change the MCB ratings later?
Yes, the outgoing MCBs can be replaced by a competent person if your circuit design changes, provided the new devices are compatible with the enclosure and installation design. Always re-check your calculations, fault levels and protective coordination when modifying circuits.
- Part Code: WMMS/616
- Incomer: 100A double-pole main switch (non-RCD)
- Outgoing Ways (fitted): 2
- MCBs Fitted: 6A B-curve + 16A B-curve
- MCB Curve: B curve (ideal for standard lighting and small power circuits)
- Enclosure: Steel, IP40, earthed drop-down cover
- Bars: Integrated neutral and earth bars
- Mounting: Surface mount
- Dimensions: 130 (W) × 258 (H) × 110 (D) mm
- Colour: White powder-coated finish
- Standards: BS EN 61439; installs to BS 7671:2018 (Amendment 2)
- Typical Applications: Garage lighting and light-duty socket/tool circuit via sub-main
This WMMS/616 garage unit is supplied pre-configured with a 6A and 16A B-curve MCB pair for fast fit-out. Final installation must always be completed by a qualified electrician in accordance with BS 7671.
- Allow 3 working days for build and dispatch from our UK warehouse
- Install in a dry, ventilated indoor location only (IP40 enclosure)
- Confirm sub-main cable size, protective device and fault levels before connection
- Verify circuit design current and that 6A/16A ratings suit the lighting and power circuits
- Use suitable trunking/knockouts and maintain CPC continuity throughout
- Label outgoing ways clearly and record details on your circuit charts and test sheets
