The distribution board is the heart of any electrical installation. It controls and protects every circuit in the building, and when it is outdated, undersized, or no longer fit for purpose, everything that depends on it is affected. Whether you are a business dealing with a system that can no longer handle your electrical demands, a homeowner with an ageing fuse board, or an industrial operator whose distribution infrastructure needs upgrading to support growing loads, LC Electrical Installations provides professional distribution board and supply upgrade services across London and surrounding areas.
A distribution board (also known as a consumer unit in a domestic property, or a distribution board or panel in a commercial or industrial setting) is the central point at which the incoming electrical supply is divided into individual circuits, each protected by its own circuit breaker, fuse, or RCBO. It is the component responsible for distributing electricity safely throughout the building and for protecting circuits from overloads and faults.
A distribution board upgrade involves replacing an outdated or inadequate board with a modern unit that provides the protection, capacity, and compliance required by the current edition of BS 7671. This typically means replacing old rewireable fuse boards or early MCB boards with modern units equipped with RCDs or RCBOs on every circuit, providing the level of fault and shock protection required by current regulations.
A supply upgrade involves increasing or improving the incoming electrical supply to a property to meet higher power demands. As businesses grow and electrical usage increases, the original supply capacity can become a limiting factor. A supply upgrade, carried out in coordination with the relevant Distribution Network Operator, increases the capacity available to the building, allowing additional equipment, machinery, and circuits to be added safely.
In commercial and industrial environments, distribution infrastructure can be considerably more complex, involving multiple sub-boards, busbar chambers, motor control centres, and metering arrangements. We have the experience to assess, design, and carry out upgrades across all levels of complexity.
At LC Electrical Installations, we carry out distribution board and supply upgrades for commercial, residential, and industrial clients across London and the surrounding counties. All work is carried out by our qualified, NICEIC-approved electricians and fully certified on completion.
Modern distribution boards include updated RCD and RCBO protection designed to minimise the risk of electric shock, electrical faults, overloads, and fire hazards. An upgraded board provides a significantly higher level of protection than an older fuse board or early MCB unit.
A supply upgrade allows commercial and industrial premises to safely handle additional equipment, machinery, lighting systems, and growing electrical demands without overloading the existing supply infrastructure.
Upgraded electrical distribution systems reduce the likelihood of nuisance tripping, circuit failures, and unplanned downtime that can affect daily business operations and, in an industrial setting, production continuity.
Replacing outdated boards and upgrading supplies brings your electrical installation into compliance with the current edition of BS 7671 and the requirements of the Electricity at Work Regulations 1989, which is an important obligation for commercial and industrial operators.
A well-designed upgraded distribution system can be specified with spare capacity and additional ways, allowing new circuits and increased loads to be added as your business grows without the need for further major works.
Installing new machinery, air conditioning systems, EV charging infrastructure, or significant additional electrical loads almost always requires an assessment of the existing distribution capacity, and often an upgrade to accommodate the new demand safely.
Knowing when your distribution board or supply is no longer adequate is important. Here are the most common signs that an upgrade is likely to be needed:
If circuit breakers regularly trip or fuses blow without an obvious cause, this may indicate that the existing system is overloaded or that the protective devices are ageing and no longer operating correctly. Persistent tripping is not something to reset and ignore, it is a signal that the installation needs assessing.
Rewireable fuse boards and early MCB consumer units without RCD protection do not provide the level of protection required by current standards. If your property still has one of these, an upgrade is strongly recommended regardless of whether you are experiencing any specific problems.
Installing additional equipment, air conditioning, commercial catering equipment, EV chargers, new production machinery, or significant additional lighting, may require increased electrical capacity and an upgraded distribution system to accommodate the additional load safely.
A lack of spare circuits or an overloaded distribution board limits what can be added to the installation and creates reliability issues. If your board is full and you need additional circuits, an upgrade is the right solution.
Commercial renovations, industrial expansions, and residential extensions often require upgraded electrical supplies and distribution boards to support the new layout, additional space, and increased power requirements of the extended premises.
Both commercial and residential properties looking to install EV charging points often find that the existing supply and distribution infrastructure needs assessing and potentially upgrading to support the additional dedicated loads that EV charging requires.
A distribution board or supply upgrade is a significant piece of electrical work, and it is worth being properly informed before you proceed.
For commercial and industrial premises, the existing electrical infrastructure should be thoroughly assessed before any upgrade is specified. The upgrade needs to be designed around the actual and anticipated electrical loads of the site, with appropriate spare capacity built in. Undersizing a new distribution system is a common mistake that leads to further works being required sooner than expected.
For supply upgrades involving an increase in the incoming supply capacity, the process involves coordination with the relevant Distribution Network Operator as well as the internal works carried out by LC Electrical. Timescales for supply upgrades can be longer than for distribution board replacements alone, and this is worth factoring into project planning. We will advise clearly on the process and likely timescales when we carry out the initial assessment. For domestic properties, a consumer unit replacement is notifiable work under Part P of the Building Regulations. As NICEIC-registered contractors, we self-certify and handle all required notifications on your behalf.
During the upgrade works, there will be a period during which the electrical supply to the building is interrupted. For commercial and industrial clients, we plan the works carefully to minimise the duration and impact of any supply interruption, and where possible schedule the work outside of operational hours.
At LC Electrical Installations, we carry out a thorough assessment of your existing installation and electrical demands before specifying any upgrade, ensuring the solution we design is properly sized, compliant, and built to serve your needs for the long term.
At LC Electrical Installations, we approach distribution board and supply upgrades with the technical rigour and attention to detail these projects demand. A distribution upgrade that is incorrectly specified or poorly installed can create as many problems as it solves — we take the time to assess the existing installation properly, design a solution that genuinely meets the needs of the site, and carry out the work to the highest standard.
Our electricians are qualified, NICEIC-approved, and experienced across residential, commercial, and industrial distribution systems. We manage every project professionally from initial assessment through to final certification, keeping you informed throughout and minimising disruption to your property or business operations.
We carry out distribution board and supply upgrades across London, Hertfordshire, Buckinghamshire, Bedfordshire, and Middlesex. Whether you need a straightforward consumer unit replacement in a domestic property or a complex commercial distribution upgrade across a large site, LC Electrical Installations is ready to help.
1. Initial Enquiry & Site Assessment - Existing System Inspected & Loads Assessed
2. System Design & Upgrade Specification Sized for Current & Future Demands
3. Detailed Quote & Agreed Programme of Works
4. Coordination With Distribution Network Operator Where Supply Upgrade Required
5. Safe Isolation & Removal of Existing Board or Supply Equipment
6. Installation of New Distribution Board, Consumer Unit, or Supply Infrastructure
7. Full Testing & Inspection to BS 7671
8. Certification, Notification & Handover Documentation Issued
A distribution board controls and distributes electricity throughout a building, dividing the incoming supply into individual protected circuits. Each circuit is protected by a circuit breaker, fuse, or RCBO that disconnects the supply automatically in the event of a fault or overload, protecting both the wiring and the people using the installation.
Common indicators include frequent tripping of circuits or breakers, an older rewireable fuse board or early MCB unit without RCD protection, a board that is full with no spare ways, visible signs of wear or overheating, or a situation where you need to add new circuits or significant new loads. An assessment by a qualified electrician will confirm whether an upgrade is required and what the right solution is.
Yes. We carry out supply upgrades to increase the incoming electrical capacity for commercial and industrial premises where the existing supply is no longer sufficient to meet the demands of the business. This involves coordination with the relevant Distribution Network Operator, and we manage the full process on your behalf.
In most cases, yes. Modern distribution boards with RCD and RCBO protection are more reliable and provide better fault discrimination than older systems, reducing the likelihood of nuisance tripping and improving the overall reliability of the electrical installation.
Yes. Consumer unit replacements in domestic properties are notifiable work under Part P of the Building Regulations in England. As NICEIC-registered contractors, we self-certify the completed work and handle all required notifications on your behalf.
We plan all distribution upgrade works carefully to minimise the duration and impact of any necessary supply interruption. Where possible, we schedule works outside of normal operating hours. This is something we discuss and agree with you at the planning stage.
Yes. While our distribution upgrade work is primarily commercial and industrial, we also carry out consumer unit upgrades and replacements for homeowners and residential landlords across London and the Home Counties.
The cost depends on the type and size of the board being replaced, the complexity of the installation, and whether a supply upgrade is also required. We provide free, no-obligation site assessments and detailed quotes tailored to each project and get in touch to arrange a visit.
Whether you are a business whose electrical system needs upgrading to support growing demands, an industrial operator requiring a distribution infrastructure review, or a homeowner or landlord looking to replace an outdated consumer unit, LC Electrical is ready to help. We offer free, no-obligation site assessments and detailed quotes across London, Hertfordshire, Buckinghamshire, Bedfordshire, and Middlesex.
Our team is easy to deal with, technically experienced, and committed to delivering distribution upgrades that are properly specified, safely installed, and built to last. Get in touch today and tell us what you need and we'll take it from there.
