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Consumer units & fuse boards · W4
PEP provides consumer unit installation and replacement in Chiswick W4. We specify new boards for agreed refurbishment and rewiring projects, as well as replacements for existing fuse boxes, with the connected circuits, suitable protection, testing and certification considered together.
Before work begins, we explain what the board will supply, which circuits are retained and how the agreed installation will be tested and documented.
You do not need to be renovating the whole house. A standalone replacement receives the same attention to assessment, testing and a properly documented handover.
Assessment · Installation & replacement · Testing & certification
Domestic Installer SchemeExisting installation
assessed before replacement
Installation, testing
and documentation
New installation · Replacement · Planned alterations
A kitchen extension or wider refurbishment can change how a Chiswick home uses electricity. We assess the proposed circuits and the existing supply before deciding whether the work calls for a new main board, a replacement or a different distribution arrangement.
For a refurbishment or rewire, we specify the consumer unit alongside the proposed circuits, assessed demand and incoming supply. The board, protective devices and circuit schedule form part of the installation design.
Replacing an existing fuse box is a different scope from rewiring the property. We assess the circuits that will remain and explain any required remedial work; a new board does not renew hidden cables.
An additional board or a different position may be considered for the agreed project. Suitability depends on the supply, circuit design, access and installation conditions. It is assessed and quoted, not assumed to be necessary.
Perhaps the fuse box has remained untouched while the rooms around it have changed. You may have inherited an installation with little documentation, or an inspection report may have identified improvements to the protection.
The first decision is whether replacing the board addresses the actual requirement. Damage, unsuitable protective arrangements and planned circuit additions can justify a change. Repeated tripping, however, may originate in an appliance or wiring fault that needs its own investigation.
The appearance of an older board is not enough to settle the question. Age or a plastic enclosure alone does not establish that replacement is necessary. We consider the equipment and the installation together, then explain the work that follows from that assessment.
Replacement · repairs · additions
It helps to distinguish between work that is often grouped under the phrase “fuse board upgrade”.
covers the agreed enclosure, protective devices, reconnection of suitable existing circuits, circuit identification and verification of the completed work.
address defects or deficiencies that affect the replacement. These might concern an existing circuit, earthing or protective bonding. They are not the same thing as supplying a new board and should be identified in the proposed scope.
serve new requirements, such as equipment introduced during a kitchen refurbishment. They involve their own design and installation work rather than simply occupying an empty position in the consumer unit.
PEP sets out these distinctions so you can understand the proposal and compare it with the work you actually need. If further issues emerge during the job, we explain their implications and agree how they will be addressed.
An individual quotation
The quotation depends on whether this is a new consumer unit installation or a replacement, the circuit schedule, protection required and any agreed wiring or access work. These items are explained before installation; a board-only price should not be assumed to include new circuits or remedial work.
A useful quotation describes the completed installation, not just the price of the box.
The cost of a fuse box replacement depends on the number and condition of the circuits, the protective arrangement, access to the existing equipment and any associated repairs. Moving the board or adding supplies for new equipment changes the scope further.
When reviewing the proposal, you should be able to identify:
A photograph helps us prepare for the discussion, but it cannot establish the condition of concealed wiring. We explain what assessment is needed before confirming the work and price. Where something depends on further investigation, that should be stated rather than hidden within a general allowance.
Plan the board around the work
An induction hob, a second oven and a utility room may change the electrical requirements of a refurbishment. A later phase might introduce different heating equipment or a garden workspace.
Share the appliance information and any confirmed plans while the replacement is being considered. We can assess the proposed demand, circuit requirements and board arrangement together, including what can reasonably be accommodated for a known later phase.
Spare spaces in a consumer unit do not, by themselves, mean that the incoming supply or existing wiring can support another load. Nor does fitting a larger board automatically increase the power available to the property.
For work extending beyond the consumer unit, our electrical services in Chiswick can form part of the wider project discussion.
The specification should explain how the circuits will be protected, not simply describe the replacement as “modern”.
detects certain leakage currents and disconnects the supply to reduce the risk of electric shock. In some arrangements, one RCD serves several circuits.
combines residual-current and overcurrent protection for an individual circuit. Separating circuits in this way can limit the extent of an interruption when a fault occurs.
helps protect equipment against transient overvoltages. It performs a different function from the devices protecting against earth-leakage faults and overloads.
PEP considers the protective devices, circuit arrangement and applicable requirements of BS 7671 as a single specification. The choice should suit the installation being handed over, including any agreed new work.
Access · sequence · power interruption
A standalone fuse board replacement can be planned around access to the home. During a refurbishment, the timing also needs to fit the electrical work taking place elsewhere.
Changing the board before the new circuit requirements are settled can lead to avoidable alterations. Leaving the decision until joinery and finishes are complete may make access more difficult. We discuss the sequence before the appointment is fixed.
The work requires an interruption to the affected installation’s electricity supply. Let us know about home-working arrangements, refrigeration, heating controls or equipment that cannot be left without power without further planning.
Access is needed beyond the cupboard containing the board: inspection and testing can involve electrical points throughout the property. In a flat, access to meters or shared areas may also need to be arranged with the managing agent or freeholder.
Replacing a consumer unit does not automatically mean replacing the wiring throughout the house.
The assessment establishes which existing circuits can be retained and whether defects need attention before reconnection. If a circuit is unsuitable, installing a new protective device is not a substitute for addressing the problem.
Where the findings point towards selected circuit replacement or more extensive work, we explain that separately. Our house rewiring service in Chiswick covers the broader decision about renewing the installation.
The finished scope should leave no ambiguity about what has been replaced, what has been retained and what remains outside the agreed work.
If you are comparing a fuse box change with broader electrical work, our consumer unit replacement or full rewire guide explains how retained circuits and assessment findings shape that decision.
At completion, the new arrangement should be understandable as well as tested. Circuits are identified, the controls explained and the relevant results recorded.
Your Electrical Installation Certificate (EIC) records the work carried out, together with its inspection and test results. An Electrical Installation Condition Report (EICR) has a different purpose: reporting on the state of the existing installation within an agreed inspection scope.
For a domestic consumer unit replacement in England, Building Regulations notification is required. PEP arranges this for the work we carry out, alongside the relevant compliance documentation.
Keep the certificate, circuit information and compliance records together. They provide a useful reference for future electrical work and questions about what was completed.
Chiswick · W4 · nearby addresses
PEP welcomes enquiries from houses and flats throughout Chiswick’s W4 postcode district, including Bedford Park, Turnham Green, the Glebe Estate, Old Chiswick and Chiswick Mall.
We also cover Grove Park in Chiswick, Strand-on-the-Green, Gunnersbury, Chiswick Park and Acton Green. The starting point may be a board inside fitted joinery, a hallway cupboard or a separate utility space; the location and access are useful details to include with your enquiry.
For nearby addresses towards Stamford Brook and Hammersmith in W6, Acton in W3 or Brentford and Kew Bridge in TW8, send the full postcode so we can confirm arrangements for your property.
Our consumer unit replacement service in London explains the wider service and coverage.
Often, yes, provided the existing circuits are suitable for continued use with the proposed protection. The assessment determines whether the work can remain a board replacement or needs associated repairs. A new consumer unit should not be presented as a substitute for renewing defective wiring.
No. It changes the distribution and protection within the installation; it does not automatically increase the incoming supply capacity. Significant new loads need to be assessed against the supply and circuit arrangements, even if the replacement board has spare positions.
Yes. Provide the layout, equipment specifications and proposed timing. Those details help establish the circuit requirements and suitable board arrangement. We distinguish an agreed future phase from an idea that has not yet been designed, so the specification has a clear basis.
Electrical Safety First recommends an EICR ahead of a planned consumer unit replacement. A separate full report is not a universal legal prerequisite, but appropriate checks before the work remain essential. If you already have an EICR, send it with your enquiry so its findings can inform the scope.
We explain the finding and the work needed to address it. A circuit that cannot safely be reconnected may have to remain disconnected until repairs are completed. This is one reason to assess the installation before the changeover rather than assume that every circuit can simply be transferred.
Possibly, subject to a suitable position, sufficient space and safe access. The dimensions and layout of the new enclosure may differ from the old one. Send a photograph showing the surrounding cupboard or joinery, not just a close-up of the switches.
We discuss the anticipated interruption once the installation and scope have been assessed. Circuit count, access, testing and any necessary repairs affect the programme. Tell us in advance about equipment or household needs that require specific arrangements while the supply is isolated.
For the replacement, you receive an EIC with the relevant inspection and test records, circuit identification and the associated Building Regulations compliance documentation. These relate to the completed work; they do not mean that all existing wiring has been replaced or every unrelated inspection finding resolved.
Yes. PEP installs new consumer units within agreed residential refurbishment and rewiring projects, as well as replacing existing boards. We assess the supply, proposed circuits and any wiring to be retained before specifying the equipment. An additional board or relocation is considered separately where the project requires it.
Talk to PEP
Tell us your postcode and whether you need a new consumer unit, a replacement or board work within a refurbishment or rewire. If there is no existing board, send your project plans and the proposed position. For an existing installation, photographs of the closed board and its surroundings are helpful. Do not remove covers or expose electrical parts to take photographs.
We will explain the proposed scope, the practical arrangements and the testing and documentation included in the agreed work.
PEP will review the information and explain the assessment needed for a clear, property-specific quotation.