Consumer Unit Upgrades
Modern Consumer Unit UpgradesFrom £750, Fitted CleanlyAcross Stirlingshire & The Central Belt.
A modern 18th Edition consumer unit with RCBO protection on every circuit — fitted in a day, tested, certified and left as tidy as we found it.
From £750 · SJIB approved · Installation certificate issued the same day
Service overview
What it is, who it's for,
and when to book it.
Your consumer unit — the fuse board — is the single most safety-critical component in the whole installation. If it's an old wooden-backed board, a rewireable-fuse board or a plastic-cased unit with a single RCD, it's very likely no longer compliant with the current wiring regulations, and almost certainly not giving each circuit its own protection.
What the service is
A consumer unit upgrade is the full replacement of your fuse board with an 18th Edition metal-cased unit, wired so every final circuit has its own RCBO (individual overcurrent + earth-leakage protection). Existing tails, meter connections and earthing arrangements are inspected and, where needed, brought up to current standards at the same time.
Who it's for
Homeowners in older properties, buyers whose survey has flagged an outdated board, landlords who've had an EICR come back with a C2 or C3 on the consumer unit, and anyone about to install an EV charger, heat pump or solar system that needs the board upgraded first.
When it's needed
If your board is any of the following: wooden-backed, part-metal-part-plastic, protected by rewireable fuses, has a single RCD covering the whole house, or has trip switches that don't clearly separate circuits. Also if an EICR has returned a code C1, C2 or FI against the consumer unit or main protective devices.
Why professional help matters
Old boards fail quietly. A rewireable-fuse board provides no earth-leakage (RCD) protection, meaning a fault to earth in a kitchen appliance or garden tool can be fatal before the fuse ever notices. A single-RCD board means one leaking freezer can trip half the house — including the fridge — while you're at work. Individual RCBOs solve both problems at once.
The cost of ignoring it
Small electrical issues
rarely stay small.
An outdated consumer unit isn't just a compliance box — it's an active risk sitting quietly in the hallway. Left long enough, the cost of doing nothing becomes higher than the cost of the upgrade.
What happens if it's left
- →Rewireable-fuse boards offer zero earth-leakage protection — the exact protection that stops a faulty garden strimmer, kettle or immersion killing someone.
- →A single-RCD board is a nuisance-tripping machine: one wet outdoor socket takes down freezers, alarms and heating, sometimes for days if it happens while you're away.
- →Insurers routinely refuse or reduce payouts on electrical fires where the installation was demonstrably out of date and had been flagged on a previous EICR.
- →Any future EV charger, heat pump, solar PV or battery install requires a compliant board first — pay once now or pay for it twice inside two years.
- →Selling a property with a wooden-backed board almost always triggers a price reduction request from the buyer's solicitor.
Common mistakes to avoid
- ×Adding a single RCD 'shower unit' next to an old board as a workaround — this doesn't bring the installation up to standard.
- ×Choosing the cheapest quote without checking whether tails, earthing and bonding are being upgraded at the same time.
- ×Buying a consumer unit online and asking an electrician to fit it — most refuse, and rightly, because they can't guarantee the manufacturer or the components.
- ×Assuming a board 'looks fine' because it hasn't tripped — a wooden-backed board can be seconds away from a fault and still test as working.
Our process
A predictable five-step
process — every job.
No surprises, no vague timelines. You'll know what's happening at each stage and what comes next.
-
Step 1
Inspection
On-site check of the existing board, tails, earthing arrangement, main bonding to gas and water, and the condition of the incoming supply. A fixed price is quoted before any work is agreed.
-
Step 2
Diagnosis
You get a clear breakdown of what needs upgrading and why: the board itself, and — separately, if applicable — bonding, earthing, tails or a suppressor to meet current regs.
-
Step 3
Service Execution
The board is swapped in a single day for most domestic properties. Power is isolated, existing circuits are labelled and re-terminated into RCBOs, and the new board is neatly cable-managed.
-
Step 4
Testing & Verification
Every circuit is dead-tested (continuity, insulation resistance, polarity) and live-tested (Zs, RCD trip times) to BS 7671. Any pre-existing faults are flagged before we leave.
-
Step 5
Completion & Guarantee
An Electrical Installation Certificate is issued the same day. Workmanship is guaranteed for 12 months; the board itself typically carries a manufacturer warranty of 2–10 years depending on brand.
Why customers stay with Electrust
Six practical benefits,
measured on real jobs.
Speed
Most domestic upgrades are completed in a single day with minimal power interruption.
Safety
Individual RCBO protection on every circuit — the highest practical level of protection for a domestic installation.
Longevity
Modern metal-clad units are rated for decades of service; RCBOs also protect the wiring, extending its life.
Cost Savings
One nuisance trip no longer defrosts a full freezer or knocks the router offline for eight hours.
Reliability
Circuits are cleanly separated and labelled, so future work — sockets, EV charging, solar — plugs into a compliant starting point.
Peace Of Mind
Certified, insured, guaranteed and issued with paperwork the same day. No loose ends.
The detail
Materials, methods
and the situations that shape them.
Consumer units are not all created equal. Below is what actually goes into an Electrust upgrade so you can compare quotes properly.
The Board Itself
A metal-cased 18th Edition Amendment 2 consumer unit — typically 8, 10, 12 or 14 way — sized to the number of circuits in the property plus reasonable spares. Brands used are mainstream UK manufacturers (Hager, Wylex, Fusebox, Contactum) with genuine RCBOs, not third-party clones.
RCBO On Every Circuit
Rather than one or two RCDs shared between half the house, every final circuit gets its own RCBO. This gives each circuit both overcurrent (MCB) and earth-leakage (RCD) protection, and means one faulty appliance only trips its own circuit — nothing else.
Surge Protection (SPD)
A Type 2 Surge Protective Device is fitted where appropriate, guarding sensitive electronics — routers, TVs, boilers, EV chargers, PV inverters — from transient overvoltages caused by nearby lightning strikes or switching on the grid.
Tails, Earthing & Bonding
Meter tails are checked for correct rating (usually 25mm²), the main earthing conductor is checked against the earthing arrangement (TN-S, TN-C-S or TT), and main protective bonding to incoming gas and water is verified. Anything sub-standard is flagged, priced and upgraded with your agreement.
Standard vs. Bigger Boards
Standard 8-circuit installs start at £750. Larger boards (10–14 way), TT-earthed properties, boards with a metering upgrade, and installs requiring extensive re-labelling or extra bonding are quoted individually after a look at the property.
Landlord & Renovation Scenarios
For letting properties the upgrade is timed around tenant changeovers where possible. For renovations the board is often relocated (e.g. from under the stairs into a utility) as part of the wider works — quoted alongside the rewire or refit.
FAQ
Straight answers before
you pick up the phone.
Still unsure? Call 07568 558466 — the phone's answered 7am–10pm, 7 days.
How much does a consumer unit upgrade cost?+
Standard 8-circuit boards start at £750 fully installed, certified and tested. Larger boards, TT installations, and jobs that need additional bonding or metering work are priced individually — always fixed before work begins.
How long does the work take?+
Most domestic upgrades are completed in a single working day with a couple of hours of total power interruption. Larger or more complex boards can extend into a second morning.
Will I lose power all day?+
No. The supply is isolated only when the board is being swapped over — typically 2–4 hours mid-day. Fridges, freezers and routers are back on the same day.
Do I get a certificate?+
Yes. An Electrical Installation Certificate (EIC) is issued and emailed the same day. This is the document insurers, buyers and future EICR inspectors will ask for.
How long will a new consumer unit last?+
A quality 18th Edition metal-clad board is expected to serve 25+ years in normal domestic use. RCBOs themselves typically carry manufacturer warranties of 2–10 years depending on brand.
Do you cover Edinburgh and Glasgow for board upgrades?+
Yes — regularly. Board upgrades are typically full-day jobs, so a run into Edinburgh, Glasgow, Livingston or the wider Central Belt is well within the working day.
Can you upgrade the board and fit an EV charger at the same time?+
Absolutely — and it's often cheaper to do both together. The charger circuit lands cleanly on a fresh board with dedicated RCBO protection.
Do I need to be home for the whole day?+
You need to be there for isolation and re-energising at the start and end. In between, most homeowners get on with their day as normal.
Recent consumer unit upgrades work
Real jobs. Real homes.












Related services
You might also need…
EICR Certificates
A proper Electrical Installation Condition Report — no ticked boxes, no scare-tactic upsells. £140–£200 based on the size of the installation, reports typically issued same day.
Learn moreHouse Rewiring
Full or partial rewires planned around the household — routed cleanly, chased minimally, tested rigorously and finished with a compliant modern consumer unit ready for the next 30 years.
Learn moreEV Charger Installation
Home charge points installed properly the first time — fixed quotes based on your actual cable run and consumer unit, no unrealistic 'from £' pricing that magically doubles on the day.
Learn moreGet a free quote
Old fuse board? Let's get you a straight price to modernise it.
Fixed prices from £750, installed and certified in a day. Call 07568 558466 or drop your postcode below.
