Why Your Fuse Board Matters Your consumer unit — commonly called a fuse board — is the central hub of your home's electrical system. Every circuit in your house runs through it, and it's responsible for cutting the power if something goes wrong. A modern consumer unit with RCD protection can literally save your life by detecting faults and disconnecting in milliseconds. An old, outdated fuse board cannot. Many homes in Nottingham, particularly older properties in areas like Beeston, Mapperley, and Carlton, still have original fuse boards from the 1970s, 80s, or even earlier. If yours is one of them, here are the signs that it's time for a replacement. Key Warning Signs 1. You Still Have a Rewirable Fuse Board If your fuse board uses rewirable fuse carriers — the ones with a piece of fuse wire stretched between two screws — it's seriously outdated. These boards offer no RCD protection, meaning they won't trip if you touch a live wire or if a fault develops. They also can't handle the electrical demands of a modern home. Rewirable fuse boards should be replaced as a priority. 2. Frequent Tripping If your circuit breakers or fuses keep tripping or blowing, it could indicate that your circuits are overloaded or that there's a fault somewhere in the wiring. While occasional tripping is normal — an RCD doing its job — frequent or unexplained tripping suggests a deeper problem. A qualified electrician can diagnose whether the issue is with the fuse board itself or with a specific circuit. 3. Burning Smell or Scorch Marks Any burning smell coming from your fuse board is a serious warning sign. Scorch marks, discolouration, or melted plastic around the consumer unit indicate that connections are overheating. This is a potential fire risk and should be investigated immediately. Do not attempt to open or repair the board yourself — call a qualified electrician. 4. No RCD Protection RCDs (Residual Current Devices) are designed to protect against electric shock and reduce the risk of electrical fires. Current wiring regulations (BS 7671, 18th Edition) require RCD protection on virtually all circuits in a domestic installation. If your fuse board has no RCD protection — which is common on boards installed before the early 2000s — an upgrade is strongly recommended. 5. You're Adding New Circuits Planning a new kitchen, adding an electric shower, installing an EV charger, or building an extension? If your existing consumer unit doesn't have spare ways (available slots) for new circuits, or if it's too old to safely accommodate additional load, you'll need an upgrade. This is often the most practical time to replace the entire board. 6. Visible Damage or Deterioration Cracks in the casing, loose connections, buzzing sounds, or warm spots on the consumer unit all indicate deterioration. Older boards with metal casings (without proper insulation) are no longer compliant with current regulations, which require all new consumer units to be made from non-combustible material. 7. Your EICR Flagged Issues If you've recently had an Electrical Installation Condition Report (EICR) carried out — which is mandatory for rental properties — and it flagged issues with your consumer unit, replacement may be required. Common EICR findings related to fuse boards include lack of RCD protection, inadequate labelling, and missing main switch isolation. What Does a Consumer Unit Upgrade Involve? A consumer unit upgrade typically takes half a day to a full day, depending on the complexity. The process involves: • Isolating the electrical supply (the power will be off for several hours) • Removing the old fuse board • Installing the new consumer unit with RCDs or RCBOs • Reconnecting and testing all existing circuits • Issuing an Electrical Installation Certificate • Notification to Building Control (handled through NAPIT registration) How Much Does a Fuse Board Upgrade Cost in Nottingham? A standard consumer unit upgrade in Nottingham typically costs between £600 and £1,000, depending on the number of circuits and whether any additional work is needed (such as upgrading the earthing or bonding). A high-specification RCBO board, which provides individual protection for every circuit, will be at the higher end of this range. Choose Somo Electrical for Your Fuse Board Upgrade As a NAPIT-registered electrician in Nottingham, Somo Electrical carries out consumer unit upgrades to the highest standards. We use quality brands, test every circuit thoroughly, and provide full certification. All our work is notified to Building Control, giving you complete peace of mind. If you're unsure whether your fuse board needs replacing, we offer a free visual assessment — just get in touch to arrange a visit.