Old rewireable-fuse and early plastic boards no longer meet the wiring regulations. We test, maintain and replace consumer units and distribution boards with 18th Edition metal-clad RCBO enclosures and surge protection — inspected against BS 7671 and certified as notifiable work under Part P.
Every board we test, maintain or replace is specified and certified against the current wiring regulations and the statutory duties your property type is held to.
Amendment 2 requires non-combustible (metal) enclosures for consumer units in domestic premises and RCD/RCBO protection on final circuits.
The product standard for low-voltage consumer units and distribution boards — every board we fit is a compliant, type-tested assembly.
Sets when a surge protection device is required and how it is coordinated and installed within the consumer unit to protect against transient overvoltage.
Replacing a consumer unit is notifiable work — we self-certify under our registration and issue Building Regulations compliance.
A board that fails inspection triggers remedial action within 28 days at private rented properties in England — replacement is often the fix.
Requires distribution boards in any workplace to be maintained in a safe condition to prevent danger to persons.
Consumer units have moved through several generations. We identify what you have, explain how it protects (or doesn't), and specify the right replacement for your installation.
Rewireable-fuse board — obsolete, no RCD protection, replacement strongly advised
MCB board with a single RCD — dated, one fault trips the whole board
Dual-RCD split-load board — circuits split across two RCDs, still nuisance-prone
Full RCBO board — individual RCD+MCB per circuit, faults isolate to one circuit
Metal-clad 18th Edition enclosure — non-combustible, the current compliant standard
Metal-clad RCBO board with surge protection device fitted per BS 7671 §443
The right board and protection level depends on how the installation is used and by whom — we specify to the sector, not a generic minimum.
Metal-clad 18th Edition board with SPD as the standard upgrade
Replacement to clear C1/C2 findings under the PRS Regs 2020
Board upgrades tied to licence conditions and fire strategy
Landlord supply board plus individual flat consumer units
Three-phase distribution board replacement with SPD and metering
Heavy-duty distribution boards, sub-mains and switchgear
Board upgrades scheduled around term breaks and holidays
Resilient boards with surge protection for critical circuits
Guest-area and kitchen distribution boards upgraded out of hours
Block distribution and per-room boards on a whole-site programme
A consumer unit is the heart of the installation. Pick the level that matches the age of your board and how much of the wiring behind it needs bringing up to standard.
A like-for-like upgrade to a modern consumer unit with individual RCBO protection on every circuit.
The current compliant standard — non-combustible metal enclosure, full RCBO protection and a surge protection device.
Metal-clad board with SPD plus remedial work on the circuits that fail inspection when the board comes off.
Three-phase distribution boards, sub-mains and multi-site board replacement programmes.
A representative sample of recent consumer unit and distribution board work. Full case studies and references available on request.
Ageing plastic split-load unit replaced with a metal-clad 18th Edition board and Type 2 SPD.
Obsolete fuse-wire board removed and replaced with a fully RCBO-protected metal consumer unit.
Dual-RCD board upgraded to individual RCBOs, ending nuisance tripping across the whole property.
Main three-phase distribution board replaced out of hours with SPD and updated circuit schedule.
Loading-bay sub-distribution board replaced and re-fed with correctly rated protective devices.
Surge protection retrofitted and a failing board replaced to protect critical care circuits.
Commercial kitchen distribution board replaced overnight with a metal-clad RCBO board.
Communal landlord distribution board upgraded alongside individual flat consumer units.
Phased replacement of distribution boards across a 120-room block during the summer break.
Representative examples — site names withheld for client confidentiality. Ask for references relevant to your sector.
Accredited consumer unit and distribution board engineers across London and the South East, with every certificate logged to your compliance record wherever your properties are.
Every consumer unit and distribution board service is available as a one-off, fixed price agreed upfront before we start.
| Service | Standard | From |
|---|---|---|
| Testing & Inspection | ||
| Consumer unit / board condition inspection | BS 7671 | £95 |
| RCD / RCBO trip-time test (per device) | BS 7671 | £15 |
| Board thermal & connection check | BS 7671 | £75 |
| Replacement Boards | ||
| RCBO consumer unit (single-phase, fitted) | BS 7671 / Part P | £450 |
| Metal-clad 18th Edition board + SPD | BS 7671 / Part P | £595 |
| Board + circuit upgrades (typical scope) | BS 7671 / Part P | £1,150 |
| Commercial three-phase distribution board | BS EN 61439-3 | Custom quote |
| Add-ons | ||
| Surge protection device (SPD) retrofit | BS 7671 §443 | £120 |
| Additional way / circuit added to board | BS 7671 | £85 |
| Tails, meter connection & earthing upgrade | BS 7671 | £180 |
Domestic and single-property jobs — book a live slot instantly. HMO, commercial and portfolio work — send an enquiry and we'll come back with a fixed quote.
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Yes. Replacing a consumer unit is notifiable under Building Regulations Part P. As a registered installer we self-certify the work and issue the Building Regulations compliance certificate, so you don't need to notify Building Control separately.
The 18th Edition requires RCD protection on final circuits, and individual RCBOs are the recommended way to provide it. Unlike a shared RCD, an RCBO isolates only the faulty circuit — so a fault in the kitchen won't plunge the whole property into darkness.
A surge protection device (SPD) protects your wiring and appliances from transient overvoltage — for example from lightning or grid switching. BS 7671 §443 requires an SPD in most modern installations unless a documented risk assessment shows it isn't needed, so we fit one as standard.
A straightforward single-phase board swap is usually a same-day job of around four to six hours, including testing and certification. If failing circuits are found once the board is off, we'll agree any remedial work with you before continuing.
There's no law forcing an upgrade in an owner-occupied home, but a rewireable-fuse or early plastic board offers no RCD protection and will typically fail an inspection. For rented properties, a failing board must be remedied within 28 days under the Electrical Safety Standards (PRS) Regulations 2020.