Consumer Unit Replacement and Installation

Outdated fuse boards (also called consumer units) pose serious risks to your property and safety. At Lumiel, we specialise in replacing old, unsafe fuse boards with modern consumer units that meet the latest UK electrical regulations. Our certified electricians deliver fast, reliable, and fully compliant upgrades - ensuring your home or business in South West London remains safe, efficient, and future-proof.

Why Upgrade Your Consumer Unit?

Enhanced Safety

Modern consumer units (fuse boards) are designed with advanced safety features that provide reliable protection for your home and loved ones.

Key Safety Features:

  • RCDs (Residual Current Devices): Continuously monitor your electricity supply and instantly switch off the power if a fault occurs, such as a stray current or a malfunctioning appliance.
  • RCBOs (Residual Current Breaker with Overcurrent Protection): Protect individual circuits by combining RCD and overcurrent protection in one unit, offering high-integrity, reliable safety.
  • SPDs (Surge Protection Devices): Installed where recommended, these guard your appliances against sudden voltage spikes caused by lightning or power surges.

Benefits of Upgrading:

  • Prevent electric shocks
  • Reduce the risk of fires
  • Protect your valuable appliances
  • Keep your home safe automatically, giving you genuine peace of mind

Upgrading your consumer unit isn’t just about compliance—it’s about creating a safer, smarter home.

Legal Compliance

Upgrading your fuse board ensures your property meets current UK electrical regulations. This is especially important for landlords, who must pass EICR Testing & Inspections to comply with rental safety standards.

Reliable Power

New consumer units offer better circuit isolation, meaning fewer disruptions and safer operation for your appliances. They also accommodate modern electrical demands, such as EV chargers, smart home systems, and high-power devices.

Our Fuse Board Replacement Process

  1. Assessment

We begin with a thorough inspection of your current fuse board to identify safety risks and compatibility issues.

  1. Installation

Our certified electricians remove the old unit and install a modern, fully compliant consumer unit with RCD and RCBO protection.

  1. Testing & Certification

After installation, we conduct rigorous safety tests and provide an Electrical Installation Certificate, confirming compliance with UK standards.

  1. Clean-Up & Handover

We leave your property clean and tidy, explaining the new system and answering any questions you may have.

Why Choose Lumiel for Fuse Board Replacement?

TRUSTED AND CERTIFIED

Our electricians are NICEIC-approved, ensuring the highest standards of safety and workmanship.

TRANSPARENT PRICING

We provide fixed-price quotes with no hidden fees, so you know exactly what to expect.

SAFETY-FIRST APPROACH

Your safety is our priority. We follow strict safety protocols and use only high-quality, compliant materials.

LOCAL EXPERTISE

Based in Sutton, we serve South West London, Surrey, and surrounding areas, offering fast response times and local knowledge. For urgent issues, our Emergency Electricians in South West London are always available.

Areas We Serve

  • Sutton
  • South West London
  • Surrey
  • South London
  • London

Fuse Board Replacement Costs

The cost of replacing your fuse board depends on:

  • The type of board (e.g., RCBO, High-Integrity)
  • Labour and installation time
  • Any additional wiring or system upgrades

For a personalised quote, contact our team today.

Upgrade Your Fuse Board Today

Protect your home or business with a safe, modern fuse board upgrade. Our team is ready to provide a fast, professional, and hassle-free service.

Contact our electricians today — your safety is our priority.

Book a Service

Frequently Asked Questions

How long does it take to replace a fuse board?
Replacing a fuse board (consumer unit) typically takes 4 to 6 hours for a standard domestic property. The process involves isolating the power, removing the old unit, installing the new one, and testing all circuits to ensure safety. Larger properties or those with complex wiring may take longer. Your electrician will provide a fixed timeline during the initial assessment.
How much does it cost to replace a fuse board?
The cost to replace a fuse board (consumer unit) varies depending on the property size and complexity. For an average 3-bedroom home in Sutton or South London, prices typically range from £400 to £800, including labour and parts. Larger properties or those requiring additional safety devices (such as RCBOs) may cost more. Always request a fixed-price quote from your electrician to avoid unexpected costs.
Is replacing a fuse board necessary for safety?
Yes, replacing an outdated fuse board (consumer unit) is often necessary for safety. Older fuse boards may lack modern safety features, such as RCDs (Residual Current Devices), which protect against electric shocks and fires. If your fuse board is over 10 years old, shows signs of damage, or frequently trips, it’s advisable to upgrade to a modern consumer unit to ensure your home meets current safety standards.
What’s involved in replacing a fuse board?
Replacing a fuse board (consumer unit) involves:
  1. Isolating the power to ensure safety.
  2. Removing the old unit and disconnecting all circuits.
  3. Installing the new consumer unit, which may include RCDs or RCBOs for enhanced protection.
  4. Reconnecting and testing all circuits to ensure they are safe and functional.
  5. Issuing a certificate to confirm the installation meets UK safety standards.
The process typically takes 4 to 6 hours for an average home.
What’s the difference between a fuse box and a consumer unit?
A fuse box is an older term for the main electrical control panel in a property, which uses fuses to protect circuits. A consumer unit is the modern equivalent, featuring circuit breakers (MCBs) and Residual Current Devices (RCDs) for improved safety. Consumer units are designed to trip automatically in the event of a fault, reducing the risk of electric shocks and fires. Upgrading from a fuse box to a consumer unit is highly recommended for safety and compliance.
When should I replace my fuse board?
You should consider replacing your fuse board if:
  • It’s over 10 years old.
  • It’s made of plastic or outdated materials.
  • It lacks RCD protection.
  • You experience frequent tripping or power issues.
  • You’re upgrading your home’s electrical system (e.g. adding an EV charger or solar panels).
A modern consumer unit provides better safety and reliability for your property.
Will my power be off during the replacement?
Yes, your power will need to be turned off during the replacement of a fuse board or consumer unit. However, your electrician will work efficiently to minimise downtime, usually completing the job within 4 to 6 hours. If you require temporary power for essential appliances, discuss this with your electrician beforehand.

See some of our recent projects