WME12/MSR40B

The WME12/MSR40B is a 12-module steel enclosure supplied pre-assembled with a 100A main switch and 2 x 40A B-Curve RCBOs. Built to order, it offers a ready-to-install solution for residential EV charging setups, renewable energy systems, or small commercial distribution needs.

With a durable non-combustible metal body and pre-wired internals, this enclosure saves installation time while ensuring full compliance with 18th Edition BS 7671. The 12-way design provides ample space for expansion, making it ideal where additional protective devices may be required in the future.

• Pre-fitted: Includes 100A main switch + 2 x 40A B-curve RCBOs
• 12 usable ways: Extra room for future RCBOs, MCBs, or SPDs
• Steel construction: Non-combustible enclosure, regulation compliant
• Applications: Residential EV chargers, renewables, small distribution boards
• Built to order: Please allow 3 working days for dispatch

• Enclosure: 12-module steel consumer unit
• Main Switch: 100A
• Protective Devices: 2 x 40A B-curve RCBOs
• Curve Type: B (suitable for general residential and light commercial loads)
• Dimensions: Approx. 270mm (W) x 240mm (H) x 112mm (D)
• Knockouts: Top, bottom, sides, and rear for flexible cable entry
• Mounting: Surface mount, keyhole slots
• Compliance: BS EN 61439-3, BS 7671 (18th Edition)
• SKU: WME12/MSR40B

This special-build board is supplied pre-fitted and pre-wired with main switch and RCBOs, reducing setup time on site. Final installation must be completed by a qualified electrician.

• Allow 3 working days build time before dispatch
• Ensure enclosure is mounted level and securely fixed
• Use spare module ways for additional protection devices if required

What does this unit include?

A 12-way steel enclosure with 100A main switch and 2 x 40A B-curve RCBOs, pre-installed and wired.

Is this enclosure expandable?

Yes — the 12 usable ways allow additional MCBs, RCBOs, or surge protection devices to be added if required.

What’s the lead time?

This is a built-to-order unit. Please allow 3 working days before dispatch.

Where is this enclosure typically used?

It’s ideal for EV charging circuits, renewable installations, or as a small distribution board in residential and commercial setups.

What curve type are the RCBOs?

The included RCBOs are B-curve, suited to standard residential and light commercial loads.