Fuse Box / Consumer Unit Replacement Wood Green

Yes, on socket-outlet final circuits rated ≤32A — BS 7671:2018+A2:2022 §421.1.7 (September 2022 enforcement). For a typical Wood Green HMO on the Noel Park Estate or off the High Road, that's AFDD-RCBOs on every sockets ring, every kitchen sockets circuit, utility sockets, and communal sockets. Lighting circuits stay on standard RCBO. Where the property has been split into multiple let units, each unit gets its own AFDD-protected sockets ring rather than borrowing across a partition. EIC pack formatted for Haringey Council's HMO licensing.

Yes — Haringey Council's HMO licensing team accepts BS 7671-certified upgrades when the pack includes the Electrical Installation Certificate, the schedule of test results, and an in-date EICR. We issue the three as a single PDF formatted for the Haringey licensing portal. Note: Haringey's additional licensing scheme covers all of Wood Green N22 — we factor that into the certification format. If you're applying for a new licence alongside the upgrade, we sequence the work to land everything in one submission window.

Depends on the HMO setup. Single-household shared houses get one consumer unit. Properly converted flats — common across Wood Green's larger Victorian terraces split into 2-3 units off Lordship Lane or around Trinity Gardens — each get their own consumer unit on a segregated supply. Some pre-2010 conversions in N22 were done without supply re-segregation, with each flat tapped off a single CU; we check that at the cutout before quoting and involve UK Power Networks if a new segregated supply is needed.

Both protect against electric shock and electrical fire. The difference is granularity.

• RCD consumer unit (typically dual-RCD): Two big trip switches, each protecting a group of circuits. If one circuit faults, the whole RCD group trips — you lose the kitchen, lights, and sockets together.
• RCBO consumer unit (one RCBO per circuit): Each circuit has its own combined trip switch. If the kitchen socket faults, only that circuit goes off — the rest stay live.

Why we recommend RCBO for most Wood Green installs:

• Faster fault diagnosis — you know immediately which circuit is faulty
• Less disruption — one bad iron doesn't kill the whole upstairs lighting
• Better with modern electronics — RCBOs are more sensitive and reliable

When dual-RCD is fine: small flats with simple circuit layouts, properties on a tight budget, short-term landlord-let where cost beats convenience.

Cost difference: typically £150 between dual-RCD (£800) and full RCBO (£950). For most homeowners we recommend the RCBO upgrade — it pays for itself the first time a fault localises rather than killing half the house.

This is the most common scare we see in Wood Green — the fear-driven upsell to landlords.

Honest answer: plastic fuse boxes fitted before 1 January 2016 are still legal and don't automatically fail an EICR. They were the standard at the time of fitting. They become a problem only when:

• The plastic enclosure shows signs of overheating or burn marks (genuine C2)
• The board has no RCD protection on socket circuits (the fail reason isn't the plastic — it's the missing RCDs)
• The original installation was non-compliant when fitted

Since 1 January 2016, all new consumer units in domestic properties must be made of non-combustible material (typically metal). This is a forward-looking requirement — your existing plastic fuseboard doesn't get retrofitted just because the rules changed for new installs.

What you should worry about: not the colour of the box. Worry about RCD coverage, the age of the wiring, whether the existing fuse box has been properly maintained, and whether your EICR has C1/C2 codes against the consumer unit specifically. If an electrician quotes you for "a metal consumer unit because plastic fails EICR" without that nuance — get a second opinion.

Code-driven. C1 (danger present) must be remediated before re-energising — same-day fix on install. C2 (potentially dangerous) is folded into the fuse box upgrade scope; EICR re-test issued same day. C3 (improvement recommended) doesn't block Haringey licensing on its own. For a Wood Green HMO the typical flow is: EICR fail Monday → upgrade booked within the week → EIC + re-test EICR on install day → Haringey portal resubmission. Fast-track inside 14 days is achievable when Haringey's queue allows.

Almost always yes. The new consumer unit is the brain; your existing circuits are the nervous system. We connect to your existing circuit cables — they don't get rewired.

What we test before we commit:

• Insulation resistance on every circuit (must be at or above 1MΩ; healthy 1990s+ installs typically read above 200MΩ)
• Earth continuity — needed for RCD/RCBO to work safely
• Loop impedance — the circuit's ability to clear a fault

If a circuit fails any of these tests, we tell you before we commit. Options:

• Single circuit fix (£100-£300) — repair the fault and continue
• Targeted partial rewire of just that circuit (£300-£600)
• Hold the upgrade and discuss whether a partial or full rewire is now better value

Common Wood Green scenarios where wiring fails: 1950s-60s rubber-insulated cable in upstairs lighting circuits (Lordship Lane and Wolves Lane period properties), borrowed neutrals from DIY work, undersized cables on extension circuits.

We never "just power it back up" with a circuit that failed testing — that's how fires start. Honest tradeoffs only.

Honest answer: the £800 is fixed for the standard scope. Any extras are quoted upfront, never sprung on you mid-install.

What's covered in £800 (no surprise add-ons):

• The new consumer unit / fuse board (quality metal, 6-10 ways)
• RCD protection on socket and lighting circuits
• Re-terminating every existing circuit, properly labelled
• Full insulation, earth, and RCD testing on every circuit
• The Electrical Installation Certificate (EIC)
• Plaster patching with bonding plaster around the install

What CAN add to the price (we tell you before we start, with a fixed quote):

• Circuits failing insulation testing — we'll show you the readings, and you decide: targeted repair (£100-£300 per circuit) or hold the upgrade for a partial rewire conversation
• Incoming supply needs upgrading — rare; happens when adding heavy load like an EV charger or heat pump. We tell you upfront if your supply is borderline
• You opt for the premium tier — £950 (RCBO every circuit + surge protection) or £1,200+ (larger split-load board)

What we never do: discover a "problem" mid-install and charge you for it without your sign-off first. If we find something during testing, work pauses until you've decided. No scope creep.

Wood Green HMO supplies are largely TN-C-S across N22 — some pre-1970s council stock on Noel Park still has TT with degraded earth rods. Main bonding required to gas and water entry on both arrangements. Supplementary bonding in shower rooms unless every metallic service is bonded back to the main earthing terminal and the room sits on a 30 mA RCD. Per-flat gas or water entries bonded per-unit. Earth electrode resistance tested and recorded; new TT rod fitted where the existing reads over 200Ω.

Single-CU Wood Green HMOs: one 2-3 hour mid-morning isolation window — every let unit off during that window. Multi-CU HMOs (one per converted flat): sequenced swap one flat at a time so only one let unit is offline at any moment. Tenants notified 7 days ahead. Power back same evening — no overnight outages. Temporary kitchen-ring supply is available for the lunchtime window if you want to keep the kettle and microwave running.

Yes — and we set up Wood Green consumer units for it as standard. What we include:

• Spare 32A way on the fuseboard, labelled and ready for a 7kW or 22kW EV charger install
• Adequate supply headroom — we check your incoming supply and tell you upfront if a heat pump or EV charger needs a supply upgrade (often the headroom is fine, but worth confirming)
• SPD (surge protection) on the premium tier (£950) — protects every modern electronic in the house from voltage spikes
• Smart-home-ready circuits — neutrals to switch positions if you specify (most period houses don't have these, blocking smart switch installs later)

What gets retrofitted later costs more. Adding an EV charger circuit to an existing fuse box: £400-£600 extra labour because we need to chase walls, lift floor coverings, and isolate the supply again. Specifying it during the consumer unit upgrade: marginal cost only.

Tell us at the survey stage what you might add in the next 5 years — EV, heat pump, hot tub, garden room, second EV charger, home office. We size the board around your plans, not just your current circuits.

Almost never. Unlike a rewire, a consumer unit replacement is contained to the meter cupboard — usually under the stairs, in a hallway recess, or in a kitchen cupboard. The work stays in that one spot.

What we do during the install:

• Disconnect existing circuits at the old fuse box, label every cable
• Remove the old fuseboard from its mounting point
• Mount the new consumer unit in the same position (same screw holes where possible)
• Re-terminate every circuit into the new board
• Test, certify, and label every circuit on the new unit's chart

What we don't do:

• Chase walls
• Lift floorboards (unless an existing cable is too short to reach the new connection point — rare)
• Disturb skirting, sockets, or switches anywhere else in the house
• Affect any decoration outside the meter cupboard

The only plaster work: if the new board is a different physical size than the old one, we may need to patch a small area of bonding plaster around the mounting position. That's included; finishing coats and any decoration are a decorator's job.

Wood Green properties with the original fuse box in a tight under-stairs space sometimes need a little extra work to fit a wider modern board — we'll show you the position before we start so you can decide whether to keep it where it is or relocate.