FuseBox Consumer Units: The Trade Electrician's Buying Guide

If you've priced FuseBox boards recently, you'll know why they've taken significant market share from the established names. A FuseBox 7-way 100A main switch unit at under — with SPD options available — is a compelling spec for domestic rewires and CU upgrades. This guide covers the full FuseBox range stocked at APM, compares it against Axiom and MK Sentry, and helps you pick the right board for the job.

Why FuseBox Has Become the Go-To for UK Electricians

FuseBox entered the UK market with a simple pitch: 18th Edition compliant boards at prices that make the big-box retailers look expensive. They back it up with straightforward labelling, easy busbar connections, and a technical support line that actually picks up.

The key spec advantages over older ranges:

• Dual RCD protection as standard on their residential boards
• Type A RCDs on SPD-equipped boards (required for EV charger and heat pump circuits under the 18th Edition)
• Surge protection integrated in the same enclosure — no external device required
• Consistent physical dimensions that fit standard back-box cutouts

They're not the only good board on the market, but the combination of price, compliance, and availability has made them a firm favourite for domestic rewires where margin matters.

FuseBox Range: What We Stock at APM

FuseBox 7-Way Consumer Unit —

The workhorse of the domestic rewire market. 100A main switch, dual RCD protection. Seven ways gives you enough circuits for a standard 3–4 bedroom property: ring main, lighting x2, cooker/oven, shower, immersion, garage/outbuilding. At under ex-counter, it's well below comparable boards from Screwfix's house brands.

FuseBox F2004M Metal 4-Way —

The small-installation board — ideal for outbuildings, garages, extensions with limited circuits. Metal enclosure. 100A main switch. If you're wiring a garden room, workshop, or annexe, this is the clean spec at a tight price.

FuseBox Garage Unit (Pre-Populated) —

Pre-populated 2-way board with 63A RCD isolator and dual MCBs included. Designed for the standard outbuilding setup: lighting and sockets. Saves the time of populating MCBs separately. The board, RCD, and two breakers for under is hard to beat on a simple outbuilding job.

FuseBox SPD In-Line Surge Protection Unit —

The 18th Edition requires surge protection (SPD) for new installations and replacements in domestic premises under Amendment 2. FuseBox integrates Type 1+2 SPD in a 100A metal enclosure with main switch — no separate DIN rail device, no extra enclosure. The cleanest SPD solution for a CU upgrade or full rewire.

At , this undercuts the equivalent Axiom and Hager SPD board by a useful margin and complies fully with BS 7671:2018 + A2:2022.

Axiom: The Reliable Budget Option

Axiom boards are a solid mid-market choice. Well-made, familiar to most NICEIC inspectors, readily available. The build quality is slightly below FuseBox on the finer details (busbar locking, label quality), but for straightforward domestic work they do the job.

• Axiom 12-Way Consumer Unit 100A — — good for larger properties with more circuits
• Axiom Metal Consumer Unit 8-Way 100A — — metal enclosure, common for board upgrades where the client or inspector prefers metal

MK Sentry: The Premium All-Metal Spec

MK is the name most Part P inspectors and M&E engineers have known longest. The Sentry range uses high-quality bus connections and their metal-clad all-switch-disconnector board is the spec favoured by housing associations and larger contractors who need consistency across a lot of boards.

• MK Sentry Amendment 3 All-Metal 12-Way — — includes switch-disconnector isolator, Amendment 3 compliant, metal enclosure. The default specification for public-sector and commercial domestic work.

Comparison: FuseBox vs Axiom vs MK

What About Hager?

Hager boards aren't stocked by Screwfix or most nationals. They're a trade-only product from one of the most respected names in European electrical distribution. If you've specified Hager before, you'll know the build quality and the system fit with Hager MCBs and RCBOs is seamless.

We stock Hager consumer units at our Acton trade counter — call ahead to confirm availability and pricing on specific configurations: 020 8702 8080.

How to Choose the Right Board

• Standard domestic rewire (3–4 bed): FuseBox 7-way or Axiom 8-way. Specify FuseBox SPD board if SPD is in scope.
• Small outbuilding / extension: FuseBox 4-way or garage unit.
• Large property or upgrade with many circuits: MK Sentry 12-way or Axiom 12-way.
• Commercial domestic / housing association: MK Sentry Amendment 3 all-metal — most widely accepted by inspectors.
• EV charger or heat pump circuit: Specify a board with Type A RCDs on the relevant circuits. FuseBox SPD board covers this.
• Hager specified by client or M&E consultant: Call us at 020 8702 8080 — we have Hager boards available at the trade counter.

In Stock for Same-Day Collection

All boards listed above are in stock at our Acton trade counter. Walk in or order by 3pm for next-day delivery across London and the UK. If you're pricing a job and need to confirm stock on a specific configuration, call us.

APM Plumbing & Electrical | 24 Western Avenue, Acton, London W3 7TZ | 020 8702 8080 | apmi.uk