Consumer Unit Replacement: A Guide for Leicester Homeowners

A Litt • 13 August 2025

Updated Consumer Units are Vital for Electrical Safety

Your home's consumer unit, often still called a fuse box, is the heart of your electrical system. It's the central point that safely distributes electricity throughout your property and protects you from electric shocks and fires. But like all technology, consumer units have evolved significantly, and an older model may not meet today's rigorous safety standards.


If you’re looking to replace your consumer unit in Leicester, it’s a job that requires professional expertise. At 786 Electricals, we specialize in providing safe, certified, and compliant consumer unit upgrades across Leicester and Leicestershire.


Do You Need a New Consumer Unit? Key Signs to Look Out For

While there's no fixed expiry date, there are several key indicators that it's time to consider a replacement:

  • You still have an old fuse box: If your unit has rewireable fuses instead of modern circuit breakers, it's a clear sign it's outdated and provides a lower level of protection.
  • Frequent tripping: If your circuit breakers are constantly tripping, it could be a sign your unit can't handle your home's modern electrical load.
  • Visible damage or scorch marks: Any signs of wear and tear, such as burns, melted plastic, or rust, are a major safety concern and require immediate attention.
  • Lack of RCD protection: Residual Current Devices (RCDs) are crucial life-saving devices. If your consumer unit doesn't have RCD protection on all circuits, it doesn't meet the latest wiring regulations.
  • It’s made of plastic: Under the 18th Edition Wiring Regulations (BS 7671), all new consumer units installed in a domestic property must be made of non-combustible material, typically metal, to help contain fires.
  • You're having major renovation work: If you are adding an extension or making significant electrical changes, it's the perfect time to upgrade to ensure the entire system is up to current standards.


Why is Replacing Your Consumer Unit Not a DIY Job?

Replacing a consumer unit is not a DIY task. It's a complex, dangerous job that must be carried out by a fully qualified and certified electrician. This isn't just a recommendation; it's a legal and safety requirement under the Building Regulations, specifically Part P.

Here’s why you need a professional:

  1. Safety First: Working with live electricity is extremely dangerous. Professionals are trained to work safely and have the correct equipment to isolate the supply and perform the work without risk.
  2. Compliance with Regulations: All new consumer unit installations must adhere to the latest 18th Edition of the IET Wiring Regulations. A certified electrician, like those at 786 Electricals, will ensure your new unit is compliant, tested, and correctly certified.
  3. Proper Testing: After installation, a series of comprehensive tests are required on all circuits to ensure the new unit is functioning correctly and the existing wiring is safe. This can only be performed with specialist, calibrated equipment.
  4. Official Certification: Upon completion, you will receive an Electrical Installation Certificate (EIC) and a Building Regulations Compliance Certificate. This is vital for your home insurance and will be needed if you ever sell your property.


The Process of a Consumer Unit Upgrade with 786 Electricals

When you choose 786 Electricals for your consumer unit replacement, you can expect a smooth, professional, and transparent process.

  1. Initial Consultation & Quote: We'll discuss your needs and provide a free, no-obligation quote. Our pricing is clear and upfront, with no hidden costs.
  2. Pre-Installation Inspection: Before any work begins, we'll perform a thorough visual inspection of your existing electrical system to ensure it's suitable for the new unit.
  3. Safe Installation: Our NAPIT-certified electricians will safely remove your old unit and install a modern, metal-clad consumer unit equipped with RCBOs (Residual Current Breakers with Overcurrent protection) for maximum safety.
  4. Full Testing & Certification: After installation, we'll carry out all necessary testing and provide you with the required certification, including the EIC. We'll also notify your local building control on your behalf.
  5. Clean and Tidy Service: We pride ourselves on leaving your home clean and tidy, with minimal disruption.


What Will a Consumer Unit Replacement Cost?

The cost of replacing a consumer unit can vary depending on several factors, such as the size of your home and the number of circuits. While a precise quote requires a visit, the average cost for a standard replacement in the UK typically falls between £500 and £1,000, including parts, labor, and certification. Our fixed-price structure ensures you know exactly what you'll pay before any work begins.



For a reliable, expert, and fully certified consumer unit replacement in Leicester, trust the local specialists.

Contact 786 Electricals today for your free, no-obligation quote and take the first step towards a safer home. 📞

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