Fuse Box Upgrade Process – Step-by-Step
| Stage | Action | What Happens? | Duration | Key Notes |
|---|---|---|---|---|
| 1. Pre-Upgrade Checks | Electrician inspects existing system EICR | Tests wiring, earthing, fuse types, and circuit load | 30–60 mins | Older wiring may need replacing first |
| 2. Quote & Legal Compliance | Receive written quote & discuss regulations | Covers unit type, labour, and any rewiring needed | – | Must comply with 18th Edition Wiring Regulations (BS 7671) |
| 3. Choosing a New Unit | Select modern consumer unit | Options: • High Integrity (Dual RCD) – Prevents total power loss • Metal-Clad – Required near escape routes | – | Metal-clad is safer and often required in London flats |
| 4. Power Disconnection | Mains turned off | No electricity during installation | 4–8 hrs | Plan for fridge/freezer storage if needed |
| 5. Old Fuse Box Removal | Outdated unit disconnected | Wires safely isolated before removal | 1–2 hrs | Watch for asbestos in pre-1980s homes |
| 6. New Unit Installation | Fitting & wiring new consumer unit | MCBs (mini circuit breakers) & RCDs installed | 2–4 hrs | Ensures surge protection & prevents shocks |
| 7. Circuit Testing | Full safety checks | Tests insulation, earthing, and fault detection | 1–2 hrs | Essential for certification |
| 8. Certification & Documentation | Receive legal paperwork | Includes: • Electrical Installation Certificate (EIC) • Building Regulations Compliance | – | Needed for insurance & selling your home |
| 9. Power Restored | Electricity switched back on | All circuits checked for functionality | Immediate | Test lights, sockets, and appliances |
| 10. Handover & Advice | Electrician explains new system | Labels circuits, provides manual | 15–30 mins | Ask about warranty & next inspection date |
Norm Electrical Engineering
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